| Diagnosis and Testing Refer to Wiring Diagrams Section 412-03A, for schematic and connector information. Special Tool(s) | | Terminal Probe Kit 418-S035 | General Equipment Digital Multimeter (compatible with K-type thermocouple) Worldwide Diagnostic System (WDS) Refrigerant center Thermometer - Fluke 80 PK-8 (FSE number 260 4102 001 07) Inspection and Testing - VERIFY the customer concern.
- Visually CHECK for any obvious mechanical or electrical damage.
NOTE:Ensure correct locking of wiring harness connectors. Visual Inspection | Mechanical | Electrical | - Refrigerant lines
- Condenser
- Drive belt
- A/C compressor
| - Fuses
- Wiring harness
- Connector
| - RECTIFY any obvious causes for a concern found during the visual inspection before performing any further tests. CHECK the operation of the system.
- If the concern is still present after the visual inspection, perform fault diagnosis on the electronic engine management, the charging system, the generic electronic module (GEM), the instrument cluster, the electronic automatic temperature control (EATC) and the auxiliary climate control module using WDS and RECTIFY the fault(s) displayed in accordance with the fault description. CHECK the operation of the system.
- On a vehicle without stored fault(s), continue according to the Symptom Chart and the corresponding symptom.
- Following checking or elimination of the fault(s) and after completion of operations, the fault memories of all vehicle modules must be READ OUT and any stored faults must be DELETED. READ OUT all fault memories again following a road test.
Trouble code table - vehicles with auxiliary climate control Trouble code table - auxiliary climate control | Diagnostic trouble code. | Description | Action | | B10BA11 | Auxiliary climate control blower control module, short-circuited (short to ground) | GO to Pinpoint Test A. | | B10BA12 | Auxiliary climate control blower control module, short circuit to voltage | GO to Pinpoint Test A. | | B10BA13 | Auxiliary climate control blower control module, open circuit | GO to Pinpoint Test A. | | B10B012 | Auxiliary climate control blower relay circuit, short circuit to voltage | GO to Pinpoint Test A. | | B10B014 | Auxiliary climate control blower relay circuit, open circuit or short-circuited (short to ground) | GO to Pinpoint Test A. | | B10B711 | Auxiliary climate control air outlet temperature sensor circuit, short-circuited (short to ground) | GO to Pinpoint Test D. | | B10B715 | Auxiliary climate control air outlet temperature sensor circuit, open circuit or short to voltage | GO to Pinpoint Test D. | | B102D12 | Auxiliary climate control temperature control flap actuator circuit, short circuit to voltage | GO to Pinpoint Test C. | | B102D14 | Auxiliary climate control temperature control flap actuator circuit, open circuit or short-circuited (short to ground) | GO to Pinpoint Test C. | | B1B7A12 | Auxiliary climate control expansion/cut-out valve circuit, short circuit to voltage | GO to Pinpoint Test B. | | B1B7A14 | Auxiliary climate control expansion/cut-out valve circuit, open circuit or short-circuited (short to ground) | GO to Pinpoint Test B. | | B1B8111 | Auxiliary climate control evaporator temperature sensor circuit, short-circuited (short to ground) | GO to Pinpoint Test B. | | B1B8115 | Auxiliary climate control evaporator temperatures sensor circuit, open circuit or short to voltage | GO to Pinpoint Test B. | | P9B6916 | Power supply voltage below limit | GO to Pinpoint Test B. | | P9B6917 | Power supply voltage above limit | GO to Pinpoint Test B. | | U014000 | No communication possible with the generic electronic module (GEM) | REFER to: Kommunikations-Netzwerk (418-00, Diagnosis and Testing). | | U001000 | No communications possible via the MS CAN bus. | REFER to: Kommunikations-Netzwerk (418-00, Diagnosis and Testing). | Symptom chart Symptom chart | Symptom | Possible Sources | Action | | Auxiliary climate control blower motor inoperative/not operating correctly | * Fuse(s) * Circuit(s) * Auxiliary climate control blower relay * Auxiliary climate control blower motor * Blower switch * Auxiliary climate control blower control module * Auxiliary climate control module * CJB (Central Junction Box) * Rear junction box (RJB) | * | | Auxiliary climate control inoperative (blower OK) | * Fuse(s) * Circuit(s) * Quantity of refrigerant * Climate control assembly * Electronic automatic temperature control (EATC) module * Auxiliary climate control module * Refrigerant pressure transducer * A/C clutch relay * Air conditioning clutch * Generic Electronic Module (GEM) * Powertrain control module (PCM) * Ambient temperature sensor * Expansion/cut-out valve | * | | Malfunction - auxiliary climate control temperature control flap | * Circuit(s) * Auxiliary climate control temperature control flap actuator * Auxiliary climate control temperature control flap * Auxiliary climate control module | * | | Circuit of auxiliary climate control air outlet temperature sensor, faulty | * Circuit(s) * Auxiliary climate control air outlet temperature sensor * Auxiliary climate control module | * | System Checks | PINPOINT TEST A : AUXILIARY CLIMATE CONTROL BLOWER MOTOR INOPERATIVE/NOT OPERATING CORRECTLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK FUNCTION OF AUXILIARY CLIMATE CONTROL BLOWER MOTOR | | | 1 Ignition switch in position II. | | | 2 SWITCH ON auxiliary climate control. | | | 3 Check all speed settings of the auxiliary climate control blower motor. | | | Is the auxiliary climate control blower motor inoperative in all of the speed settings? Yes No | | A2: CHECK FUSE FC6 (20 A) (RJB). | | | 1 Ignition switch in position 0. | | | 2 Disconnect Fuse FC6 (20 A) (RJB).. | | | 3 CHECK Fuse FC6 (20 A) (RJB).. | | | Is the fuse OK? Yes No RENEW fuse FC6 (20 A) (RJB). CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY short using the Wiring Diagrams. CHECK the operation of the system. | | A3: CHECK VOLTAGE AT FUSE FC6 (20 A) (RJB). | | | 1 Connect Fuse FC6 (20 A) (RJB).. | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between fuse FC6 (20 A) (RJB) and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse FC6 (20 A) (RJB) using the Wiring Diagrams. CHECK the operation of the system. | | A4: CHECK FUSE FB6 (10 A) (RJB). | | | 1 Ignition switch in position 0. | | | 2 Disconnect Fuse FB6 (10 A) (RJB).. | | | 3 CHECK Fuse FB6 (10 A) (RJB).. | | | Is the fuse OK? Yes No RENEW fuse FB6 (10 A) (RJB). CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY short using the Wiring Diagrams. CHECK the operation of the system. | | A5: CHECK VOLTAGE AT FUSE FB6 (10 A) (RJB). | | | 1 Connect Fuse FB6 (10 A) (RJB).. | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between fuse FB6 (10 A) (RJB) and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse FB6 (10 A) (RJB) using the Wiring Diagrams. CHECK the operation of the system. | | A6: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL BLOWER MOTOR | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA19 from auxiliary climate control blower motor. | | | 3 Ignition switch in position II. | | | 4 Measure the voltage between the auxiliary climate control blower motor, connector C4HA19, pin 2, circuit B_CBR11D (BN), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | A7: CHECK THE VOLTAGE AT THE AUXILIARY CLIMATE CONTROL BLOWER RELAY (PIN 3) | | | 1 Ignition switch in position 0. | | | 2 Disconnect Auxiliary climate control blower relay from socket RC1. | | | 3 Ignition switch in position II. | | | 4 Measure the voltage between the auxiliary climate control blower relay, socket RC1, pin 3, circuit C_SBR06A (BN/RD), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the circuit between the auxiliary climate control blower relay and fuse FC6 (20 A) (RJB) using the Wiring Diagrams. CHECK the operation of the system. | | A8: CHECK THE VOLTAGE AT THE AUXILIARY CLIMATE CONTROL BLOWER RELAY (PIN 1) | | | 1 Measure the voltage between the auxiliary climate control blower relay, socket RC1, pin 1, circuit B_CBR06C (WH/BU), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the circuit between the auxiliary climate control blower relay and fuse FB6 (10 A) (RJB) using the Wiring Diagrams. CHECK the operation of the system. | | A9: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER RELAY AND THE AUXILIARY CLIMATE CONTROL BLOWER MOTOR FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control blower relay, socket RC1, pin 5, circuit C_CBR06A (WH/BU), wiring harness side and the auxiliary climate control blower motor, connector C4HA19, pin 2, circuit B_CBR11D (BN), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes No | | A10: CHECK THE CIRCUIT BETWEEN THE RJB AND THE AUXILIARY CLIMATE CONTROL BLOWER MOTOR FOR OPEN CIRCUIT | | | 1 Disconnect Connector C4BR02-B from RJB. | | | 2 Measure the resistance between the RJB, connector C4BR02-B, pin 312, circuit C_CBR06A (WH/BU), wiring harness side and the auxiliary climate control blower motor, connector C4HA19, pin 2, circuit B_CBR11D (BN), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK RJB and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the RJB and the auxiliary climate control blower motor using the Wiring Diagrams. CHECK the operation of the system. | | A11: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER RELAY AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect C3H101-A from auxiliary climate control module. | | | 2 Measure the resistance between the auxiliary climate control blower relay, socket RC1, pin 2, circuit CHA05A (BN/WH), socket side and the auxiliary climate control module, connector C3H101-A, pin 11, circuit CHA05A (BN/WH), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK auxiliary climate control blower relay in accordance with the Component Checks at the end of this section. If the auxiliary climate control blower relay is OK, CHECK RJB and RENEW if necessary. CHECK the operation of the system. No | | A12: CHECK THE CIRCUIT BETWEEN THE RJB AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect Connector C4BR02-C from RJB. | | | 2 Measure the resistance between the RJB, connector C4BR02-C, pin 313, circuit CHA05A (BN/WH), wiring harness side and the auxiliary climate control module, connector C3H101-A, pin 11, circuit CHA05A (BN/WH), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK RJB and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the RJB and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | A13: CHECK THE GROUND CONNECTION OF THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA25 from auxiliary climate control blower control module. | | | 3 Measure the resistance between the auxiliary climate control blower control module, connector C4HA25, pin 1, circuit GD150AH (BK/WH), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in the circuit between the auxiliary climate control blower control module and ground connection G4D149 using the Wiring Diagrams. CHECK the operation of the system. | | A14: CHECK THE VOLTAGE AT THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE | | | 1 Ignition switch in position II. | | | 2 Measure the voltage between the auxiliary climate control blower control module, connector C4HA25, pin 4, circuit B_CBR11C (BN), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | A15: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE AND THE RJB FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4BR02-B from RJB. | | | 3 Measure the resistance between the auxiliary climate control blower control module, connector C4HA25, pin 4, circuit B_CBR11C (BN), wiring harness side and RJB, connector C4BR02-B, pin 312, circuit C_CBR06A (WH/BU), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK RJB and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the auxiliary climate control blower control module and the RJB using the Wiring Diagrams. CHECK the operation of the system. | | A16: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER MOTOR AND THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA19 from auxiliary climate control blower motor. | | | 3 Measure the resistance between the auxiliary climate control blower motor, connector C4HA19, pin 1, circuit VHA19A (BN), wiring harness side and the auxiliary climate control blower control module, connector C4HA25, pin 3, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in circuit VHA19A (BN) between the auxiliary climate control blower motor and the auxiliary climate control blower control module using the Wiring Diagrams. CHECK the operation of the system. | | A17: CHECK AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE | | | 1 Connect Connector C4HA19 to auxiliary climate control blower motor. | | | 2 Using a fused test cable (40 A), bridge connector C4HA25 on the auxiliary climate control blower control module between pin 3, circuit VHA19A (BN), wiring harness side and pin 1, circuit GD150AH (BK/WH), wiring harness side. | | | 3 Ignition switch in position II. | | | Does the auxiliary climate control blower motor run at full speed? Yes No RENEW the auxiliary climate control blower motor. CHECK the operation of the system. | | A18: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA25 from auxiliary climate control blower control module. | | | 3 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 4 Measure the resistance between the auxiliary climate control blower control module, connector C4HA25, pin 2, circuit VHA25A (BN/VT), wiring harness side and the auxiliary climate control module, connector C3H101-R, pin 13, circuit VHA25A (BN/VT), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in circuit VHA25A (BN/VT) between the auxiliary climate control blower control module and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | A19: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR SHORT CIRCUIT TO VOLTAGE | | | 1 Ignition switch in position II. | | | 2 Measure the voltage between the auxiliary climate control module, connector C3H101-R, pin 13, circuit VHA25A (BN/VT), wiring harness side and ground. | | | Does the meter display battery voltage? Yes LOCATE and RECTIFY the short to voltage in circuit VHA25A (BN/VT) between the auxiliary climate control blower control module and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. No | | A20: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL BLOWER CONTROL MODULE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR SHORT CIRCUIT TO GROUND | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 13, circuit VHA25A (BN/VT), wiring harness side and ground. | | | Is a resistance of more than 10,000 Ohm measured? Yes RENEW auxiliary climate control blower control module. CHECK the operation of the system. If the system is still inoperative, CHECK the auxiliary climate control module using WDS and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the short to ground in circuit VHA25A (BN/VT) between the auxiliary climate control blower control module and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | PINPOINT TEST B : AUXILIARY CLIMATE CONTROL INOPERATIVE (BLOWER OK) | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK FUSE FC4 (10 A) (RJB). | | | 1 Ignition switch in position 0. | | | 2 CHECK Fuse FC4 (10 A) (RJB).. | | | Is the fuse OK? Yes No RENEW fuse FC4 (10 A) (RJB). CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY short using the Wiring Diagrams. CHECK the operation of the system. | | B2: CHECK VOLTAGE AT FUSE FC4 (10 A) (RJB). | | | 1 Connect Fuse FC4 (10 A) (RJB).. | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between fuse FC4 (10 A) (RJB) and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse FC4 (10 A) (RJB) using the Wiring Diagrams. CHECK the operation of the system. | | B3: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL MODULE, PIN 1 | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-A from auxiliary climate control module. | | | 3 Measure the voltage between the auxiliary climate control module, connector C3H101-A, pin 1, circuit C_SBR04A (GN/RD), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | B4: CHECK THE CIRCUIT BETWEEN THE RJB AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect Connector C4BR02-C from RJB. | | | 2 Measure the resistance between the RJB, connector C4BR02-C, pin 305, circuit C_SBR04A (GN/RD), wiring harness side and the auxiliary climate control module, connector C3H101-A, pin 1, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK RJB and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the RJB and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | B5: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL MODULE, PIN 6 | | | 1 Ignition switch in position II. | | | 2 SWITCH ON auxiliary climate control. | | | 3 Measure the voltage between the auxiliary climate control module, connector C3H101-A, pin 6, circuit B_CBR06B (WH/BU), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | B6: CHECK THE CIRCUIT BETWEEN THE RJB AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4BR02-B from RJB. | | | 3 Measure the resistance between the RJB, connector C4BR02-B, pin 221, circuit B_CBR06B (WH/BU), wiring harness side and the auxiliary climate control module, connector C3H101-A, pin 6, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK RJB and RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the RJB and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | B7: CHECK THE GROUND CONNECTION OF THE AUXILIARY CLIMATE CONTROL MODULE | | | 1 Measure the resistance between the auxiliary climate control module, connector C3H101-A, pin 10, circuit GD150L (BK/WH), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in the circuit between the auxiliary climate control module and ground connection G4D149 using the Wiring Diagrams. CHECK the operation of the system. | | B8: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL EVAPORATOR TEMPERATURE SENSOR | | | 1 Disconnect Connector C4HA30 from auxiliary climate control evaporator temperature sensor. | | | 2 Ignition switch in position II. | | | 3 SWITCH ON auxiliary climate control. | | | 4 Measure the voltage between the auxiliary climate control evaporator temperature sensor, connector C4HA30, pin 1, circuit VHA30A (BN/YE), wiring harness side and ground. | | | Is a voltage of approx. 5 volts measured? Yes No - The voltage measured is more than 6 Volts:LOCATE and RECTIFY the short to voltage in circuit VHA30A (BN/YE) between the auxiliary climate control module and the auxiliary climate control evaporator temperature sensor using the Wiring Diagrams. CHECK the operation of the system. | | B9: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL EVAPORATOR TEMPERATURE SENSOR AND THE AUXILIARY CLIMATE CONTROL MODULE FOR SHORT CIRCUIT TO GROUND | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 3 Measure the resistance between the auxiliary climate control evaporator temperature sensor, connector C4HA30, pin 1, circuit VHA30A (BN/YE), wiring harness side and ground. | | | Is a resistance of more than 10,000 Ohm measured? Yes No LOCATE and RECTIFY the short to ground in circuit VHA30A (BN/YE) between the auxiliary climate control module and the auxiliary climate control evaporator temperature sensor using the Wiring Diagrams. CHECK the operation of the system. | | B10: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL EVAPORATOR TEMPERATURE SENSOR AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Measure the resistance between the auxiliary climate control evaporator temperature sensor, connector C4HA30, pin 1, circuit VHA30A (BN/YE), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 5, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK the auxiliary climate control module using WDS, RENEW if necessary. No LOCATE and RECTIFY the break in circuit VHA30A (BN/YE) between the auxiliary climate control evaporator temperature sensor and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | B11: CHECK GROUND CONNECTION FROM AUXILIARY CLIMATE CONTROL EVAPORATOR TEMPERATURE SENSOR | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control evaporator temperature sensor, connector C4HA30, pin 2, circuit RHA26A (BU/WH), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes RENEW auxiliary climate control evaporator temperature sensor. CHECK the operation of the system. No | | B12: CHECK THE CIRCUIT BETWEEN THE AUXILIARY CLIMATE CONTROL EVAPORATOR TEMPERATURE SENSOR AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 2 Measure the resistance between the auxiliary climate control evaporator temperature sensor, connector C4HA30, pin 2, circuit RHA26A (BU/WH), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 15, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in circuit RHA26A (BU/WH) between the auxiliary climate control evaporator temperature sensor and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | B13: CHECK VOLTAGE AT EXPANSION/CUT-OUT VALVE | | | 1 Ignition switch in position 0. | | | 2 Connect Connector C3H101-R from auxiliary climate control module. | | | 3 Disconnect Connector C4HA28 from expansion/cut-out valve. | | | 4 Ignition switch in position II. | | | 5 Measure the voltage between the expansion/cut-out valve, connector C4HA28, pin 2, circuit CHA28A (VT/OG), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | B14: CHECK THE CIRCUIT BETWEEN THE EXPANSION/CUT-OUT VALVE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR SHORT CIRCUIT TO GROUND | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 3 Measure the resistance between the expansion/cut-out valve, connector C4HA28, pin 2, circuit CHA28A (VT/OG), wiring harness side and ground. | | | Is a resistance of more than 10,000 Ohm measured? Yes No LOCATE and RECTIFY the short to ground in circuit CHA28A (VT/OG) between the auxiliary climate control module and the expansion/cut-out valve using the Wiring Diagrams. CHECK the operation of the system. | | B15: CHECK THE CIRCUIT BETWEEN THE EXPANSION/CUT-OUT VALVE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Measure the resistance between the expansion/cut-out valve, connector C4HA28, pin 2, circuit CHA28A (VT/OG), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 11, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK the auxiliary climate control module using WDS, RENEW if necessary. No LOCATE and RECTIFY the break in circuit CHA28A (VT/OG) between the expansion/cut-out valve and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | B16: CHECK GROUND CONNECTION FROM EXPANSION/CUT-OUT VALVE | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the expansion/cut-out valve, connector C4HA28, pin 1, circuit RHA29A (WH/VT), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes RENEW expansion/cut-out valve. CHECK the operation of the system. No | | B17: CHECK THE CIRCUIT BETWEEN THE EXPANSION/CUT-OUT VALVE AND THE AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 2 Measure the resistance between the expansion/cut-out valve, connector C4HA28, pin 1, circuit RHA29A (WH/VT), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 10, wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK the auxiliary climate control module using WDS, RENEW if necessary. No LOCATE and RECTIFY the break in circuit RHA29A (WH/VT) between the expansion/cut-out valve and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | PINPOINT TEST C : MALFUNCTION - AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP | NOTE:Ensure that the auxiliary climate control temperature control flap is mechanically OK. | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA20 from auxiliary climate control temperature control flap actuator. | | | 3 Ignition switch in position II. | | | 4 SWITCH ON auxiliary climate control. | | | 5 Measure the voltage between the auxiliary climate control temperature control flap actuator, connector C4HA20, pin 2, circuit CHA24A (WH/GN), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No | | C2: CHECK CIRCUIT BETWEEN AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR AND AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 3 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 1, circuit CHA24A (WH/GN), wiring harness side and auxiliary climate control temperature control flap actuator, connector C4HA20, pin 2, circuit CHA24A (WH/GN), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK the auxiliary climate control module using WDS, RENEW if necessary. CHECK the operation of the system. No LOCATE and RECTIFY the break in circuit CHA24A (WH/GN) between the auxiliary climate control module and the auxiliary climate control temperature control flap actuator using the Wiring Diagrams. CHECK the operation of the system. | | C3: CHECK CIRCUITS BETWEEN AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR AND AUXILIARY CLIMATE CONTROL MODULE FOR SHORT TO VOLTAGE | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 3 Ignition switch in position II. | | | 4 Measure the voltage between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and ground. | | | 5 Measure the voltage between the auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side and ground. | | | 6 Measure the voltage between the auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side and ground. | | | 7 Measure the voltage between the auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side and ground. | | | Is a voltage measured during one or more measurements? Yes LOCATE and REPAIR short to voltage in the relevant circuit(s) between the auxiliary climate control temperature control flap actuator and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. No | | C4: CHECK CIRCUITS BETWEEN AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR AND AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side and auxiliary climate control temperature control flap actuator, connector C4HA20, pin 6, circuit CHA23A (YE), wiring harness side. | | | 3 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side and auxiliary climate control temperature control flap actuator, connector C4HA20, pin 4, circuit CHA22A (VT), wiring harness side. | | | 4 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side and auxiliary climate control temperature control flap actuator, connector C4HA20, pin 3, circuit CHA21A (GY), wiring harness side. | | | 5 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and auxiliary climate control temperature control flap actuator, connector C4HA20, pin 1, circuit CHA20A (BU/GN), wiring harness side. | | | Is a resistance of less than 2 Ohms measured in all of the cases? Yes No LOCATE and REPAIR break in the relevant circuit between the auxiliary climate control temperature control flap actuator and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | C5: CHECK CIRCUITS BETWEEN AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR AND AUXILIARY CLIMATE CONTROL MODULE FOR SHORT TO GROUND | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and ground. | | | 3 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side and ground. | | | 4 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side and ground. | | | 5 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side and ground. | | | Is a resistance of more than 10,000 ohms measured in all of the measurements? Yes No LOCATE and REPAIR short to ground in the relevant circuit(s) between the auxiliary climate control temperature control flap actuator and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | C6: CHECK CIRCUITS BETWEEN AUXILIARY CLIMATE CONTROL TEMPERATURE CONTROL FLAP ACTUATOR AND AUXILIARY CLIMATE CONTROL MODULE FOR SHORT TO EACH OTHER | | | 1 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 1, circuit CHA24A (WH/GN), wiring harness side. | | | 2 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side. | | | 3 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side. | | | 4 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 6, circuit CHA20A (BU/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side. | | | 5 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 1, circuit CHA24A (WH/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side. | | | 6 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 1, circuit CHA24A (WH/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side. | | | 7 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 1, circuit CHA24A (WH/GN), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side. | | | 8 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side. | | | 9 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 7, circuit CHA21A (GY), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side. | | | 10 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 8, circuit CHA22A (VT), wiring harness side and auxiliary climate control module, connector C3H101-R, pin 9, circuit CHA23A (YE), wiring harness side. | | | Is a resistance of more than 10,000 ohms measured in all of the measurements? Yes RENEW auxiliary climate control temperature control flap actuator. CHECK the operation of the system.If the concern persists, CHECK the auxiliary climate control module using WDS and RENEW if necessary. No LOCATE and REPAIR short circuit in the relevant circuits between the auxiliary climate control temperature control flap actuator and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | PINPOINT TEST D : CIRCUIT OF AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR FAULTY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK VOLTAGE AT AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C4HA09-A from auxiliary climate control air outlet temperature sensor. | | | 3 Ignition switch in position II. | | | 4 SWITCH ON auxiliary climate control. | | | 5 Measure the voltage between the auxiliary climate control air outlet temperature sensor, connector C4HA09-A, pin 1, circuit VHA31A (GN/BN), wiring harness side and ground. | | | Is a voltage of approx. 5 V measured? Yes No | | D2: CHECK CIRCUIT BETWEEN AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR AND AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 3 Measure the resistance between the auxiliary climate control air outlet temperature sensor, C4HA09-A, pin 1, circuit VHA31A (GN/BN), wiring harness side and the auxiliary climate control module, connector C3H101-R, pin 4, circuit VHA31A (GN/BN), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK the auxiliary climate control module using WDS, RENEW if necessary. No LOCATE and RECTIFY the break in circuit VHA31A (GN/BN) between the auxiliary climate control air outlet temperature sensor and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | D3: CHECK GROUND CONNECTION FROM AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the auxiliary climate control air outlet temperature sensor, connector C4HA09-A, pin 2, circuit RHA27A (GY/BU), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes No | | D4: CHECK CIRCUIT BETWEEN AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR AND AUXILIARY CLIMATE CONTROL MODULE FOR OPEN CIRCUIT | | | 1 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 2 Measure the resistance between the auxiliary climate control air outlet temperature sensor, connector C4HA09-A, pin 2, circuit RHA27A (GY/BU), wiring harness side and the auxiliary climate control module, connector C3H101-R, pin 14, circuit RHA27A (GY/BU), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes No LOCATE and RECTIFY the break in circuit RHA27A (GY/BU) between the auxiliary climate control air outlet temperature sensor and the auxiliary climate control module using the Wiring Diagrams. CHECK the operation of the system. | | D5: CHECK CIRCUIT BETWEEN AUXILIARY CLIMATE CONTROL AIR OUTLET TEMPERATURE SENSOR AND AUXILIARY CLIMATE CONTROL MODULE FOR SHORT TO GROUND | | | 1 Disconnect Connector C3H101-R from auxiliary climate control module. | | | 2 Measure the resistance between the auxiliary climate control module, connector C3H101-R, pin 14, circuit RHA27A (GY/BU), wiring harness side and ground. | | | Is a resistance of more than 10,000 Ohm measured? Yes RENEW the auxiliary climate control air outlet temperature sensor. CHECK the operation of the system. No LOCATE and RECTIFY the short to ground in circuit RHA27A (GY/BU) between the auxiliary climate control module and the auxiliary climate control air outlet temperature sensor using the Wiring Diagrams. CHECK the operation of the system. | Component Tests Blower relay, auxiliary climate control - Check the normally open contact in the unswitched state:
- Measure the resistance at the auxiliary climate control blower relay, between pin 3 and pin 5, component side.
- Is a resistance of more than 10,000 Ohm measured?
- If yes, goto 2.
- If no, RENEW the auxiliary climate control blower relay.
- Check the normally open contact in the switched state:
- Using a fused test cable (1 A), connect pin 1 of the auxiliary climate control blower relay, component side, to the battery positive terminal.
- Using a test cable, connect pin 2 of the auxiliary climate control blower relay, component side, with the battery negative pole.
- Measure the resistance at the auxiliary climate control blower relay, between pin 3 and pin 5, component side.
- Is a resistance of less than 2 Ohms registered?
- If yes, then the auxiliary climate control blower relay is OK.
- If no, RENEW the auxiliary climate control blower relay.
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