| Diagnosis and Testing Refer to Wiring Diagrams Section 417-01, for schematic and connector information. Special Tool(s) | | Terminal Probe Kit 29-011A | Inspection and Checking NOTE:The generic electronic module (GEM) forms part of the central junction box (CJB). NOTE:If the generic electronic module (GEM) is changed, the new one must be configured. For this purpose, the vehicle-specific data is read out of the module to be replaced using WDS and is transferred to the new module. REFER to: Kommunikations-Netzwerk - 3-Türer (418-00 Modul-Kommunikations-Netzwerk, Diagnosis and Testing), Kommunikations-Netzwerk (418-00 Modul-Kommunikations-Netzwerk, Diagnosis and Testing), Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Diagnosis and Testing). NOTE:Before reading out the vehicle-specific data, remake all the electrical connections which were separated in the vehicle, so that communication between the module and WDS is ensured. - Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
NOTE:Ensure correct engagement of the wiring harness connectors. Visual Inspection | Electrical | - Fuse(s)
- Lamp(s)
- Connector(s).
- Switches
- Relay
- Wiring harness
| - Resolve any obvious causes or concerns found during the visual inspection before carrying out any further tests.
- If the cause of the concern cannot be determined with a visual inspection, proceed to the Symptom Chart.
Symptom Chart Symptom Chart | Symptom | Possible Sources | Action | | Fog lamps inoperative | * Fuse * Circuit(s) * Headlight switch * Rear fog lamp cut-off relay * Central Junction Box (CJB) * Left/right-hand rear lamp assembly * Left/right-hand rear fog lamp | * | | One fog lamp is inoperative | * Circuit(s) * Left/right-hand front fog lamp * Left/right-hand rear lamp assembly * Left/right-hand tailgate lamp assembly | * | | Rear fog lamps or front fog lamps illuminate continuously | * Circuit(s) * Headlight switch * Instrument cluster | * | | The fog lamp warning lamp in the instrument cluster is inoperative. | * Circuit(s) * Instrument cluster | * | System Checks NOTE:Use a digital multimeter for all electrical measurements. | PINPOINT TEST A : FOG LAMPS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: DETERMINE THE FAULT CONDITION | | | 1 Ignition switch in position II. | | | 2 Switch on the front fog lamps. | | | 3 Switch on the REAR FOG LIGHT. | | | 4 CHECK the front and rear fog lamps. | | | Are all fog lamps inoperative? Yes No - Front fog lamps inoperative: GO to A9. | | A2: DETERMINE THE EQUIPMENT LEVEL OF THE CENTRAL JUNCTION BOX (CJB). | | | 1 Unfasten the CJB and fold it down. | | | Is the location for connector C100 on the top of the CJB? Yes No | | A3: CHECK FUSE F116 (20 A) (CJB) | | | 1 Ignition switch in position 0. | | | 2 Disconnect Fuse F116 (20 A) (CJB). | | | 3 CHECK Fuse F116 (20 A) (CJB). | | | Is the fuse OK.? Yes No RENEW fuse F116 (20 A) (CJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system. | | A4: CHECK THE VOLTAGE SUPPLY TO FUSE F116 (20 A) (CJB) FOR OPEN CIRCUIT | | | 1 Connect Fuse F116 (20 A) (CJB). | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between fuse F116 (20 A) (CJB) and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse F116 (20 A) (CJB) using the Wiring Diagrams. If necessary RENEW the CJB. CHECK the operation of the system. | | A5: CHECK FUSE F69 (20 A) (CJB). | | | 1 Ignition switch in position 0. | | | 2 Disconnect Fuse F169 (20 A) (CJB). | | | 3 CHECK fuse F69 (20 A) (CJB). | | | Is the fuse OK.? Yes No RENEW fuse F69 (20 A) (CJB) and CHECK the operation of the system. If the fuse blows again, LOCATE and RECTIFY the short to ground using the Wiring Diagrams. CHECK the operation of the system. | | A6: CHECK THE VOLTAGE SUPPLY TO FUSE F69 (20 A) (CJB) FOR OPEN CIRCUIT | | | 1 Connect fuse F69 (20 A) (CJB). | | | 2 Ignition switch in position II. | | | 3 Measure the voltage between fuse F69 (20 A) (CJB) and ground. | | | Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse F69 (20 A) (CJB) using the Wiring Diagrams. If necessary RENEW the CJB. CHECK the operation of the system. | | A7: CHECK THE VOLTAGE SUPPLY TO THE HEADLIGHT SWITCH FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Ignition switch in position II. | | | 4 Measure the voltage between the headlamp switch, connector C320, pin 7, circuit 15-LD16 (GN/RD), wiring harness side and ground. | | | Does the meter display battery voltage? Yes INSTALL A NEW headlight switch. CHECK the operation of the system. No | | A8: CHECK CIRCUIT 15-LD16 (GN/RD) BETWEEN THE CJB AND THE HEADLAMP SWITCH FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Measure the resistance between the CJB, connector C102, pin 30, circuit 15-LD16 (GN/RD), wiring harness side and the headlamp switch, connector C320, pin 7, circuit 15-LD16 (GN/RD), wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes RENEW THE CJB. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the CJB and the headlamp switch with the aid of the Wiring Diagrams. CHECK the operation of the system. | | A9: CHECK THE HEADLIGHT SWITCH | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Using a fused bridging cable (20 A) at the headlight switch, connect between connector C320, pin 7, circuit 15-LD16 (GN/RD) and pin 3, circuit 15S-LD7A (GN/BU), wiring harness side. | | | 4 Ignition switch in position II. | | | 5 CHECK the front fog lamps and the front fog lamp warning lamp. | | | Do the front fog lamps illuminate? Yes INSTALL A NEW headlight switch. CHECK the operation of the system. No - Front fog lamps inoperative, front fog lamp warning lamp ON: GO to A10. - Front fog lamps and front fog lamp warning lamp inoperative. LOCATE and RECTIFY the break in circuit 15S-LD7A (GN/BU) between the headlamp switch and soldered connection S71 using the Wiring Diagrams. CHECK the operation of the system. | | A10: CHECK THE COMMON GROUND OF THE FOG LAMPS FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Left-hand front fog lamp from connector C302. | | | 3 Vehicles built before 01/2005: Measure the resistance between left-hand front fog lamp, connector C302, pin 2, circuit 31-LD11 (BK), wiring harness side and ground. | | | 4 Vehicles built from 01/2005: Measure the resistance between left-hand front fog lamp, connector C302, pin 2, circuit 31-LD11 (BK), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes LOCATE and RECTIFY the break in circuit 15S-LD1 (GN/YE) between soldered connection S71 and soldered connection S108 using the Wiring Diagrams. CHECK the operation of the system. No LOCATE and RECTIFY the break in circuit 31-DA3 (BK) between soldered connection S121 and ground connection G37 using the Wiring Diagrams. CHECK the operation of the system. | | A11: CHECK THE HEADLIGHT SWITCH | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Using a fused bridging cable (20 A) at the headlight switch, connect between connector C320, pin 7, circuit 15-LD16 (GN/RD) and pin 2, circuit 15S-LD13A (GN/OG), wiring harness side. | | | 4 Ignition switch in position II. | | | 5 CHECK the rear fog lamps and the rear fog lamp warning lamp. | | | Do the rear fog lamps illuminate? Yes INSTALL A NEW headlight switch. CHECK the operation of the system. No - 3-door and 5-door versions: Rear fog lamp inoperative, rear fog lamp warning lamp ON, vehicles without trailer coupling: GO to A16. - 4-door: Rear fog lamps inoperative, rear fog lamp warning lamp ON, vehicles without trailer coupling: LOCATE and RECTIFY the break in the circuit between soldered connection S72 and intermediate connector C112 using the Wiring Diagrams. CHECK the operation of the system. - Estate: Rear fog lamp inoperative, rear fog lamp warning lamp ON, vehicles without trailer coupling: GO to A14. - Vehicles with trailer hitch: Rear fog lamp(s) inoperative, rear fog lamp warning lamp ON: GO to A12. - All models: Rear fog lamp(s) and rear fog lamp warning lamp inoperative: LOCATE and RECTIFY the break in circuit 15S-LD13A (GN/OG) between the headlamp switch and soldered connection S72 using the Wiring Diagrams. CHECK the operation of the system. | | A12: CHECK THE VOLTAGE SUPPLY TO THE REAR FOG LAMP CUT-OFF RELAY FOR OPEN CIRCUIT | NOTE:The fused jumper lead used in the previous test step is still connected to the headlamp switch. | | | 1 Ignition switch in position 0. | | | 2 Disconnect Rear fog lamp cut-off relay from socket C2011. | | | 3 Ignition switch in position II. | | | 4 Measure the voltage between the rear fog lamp cut-off relay: - 3-door and 5-door versions: socket C2011, circuit (RD/WH), socket side and ground.
- All other models: socket C2011, pin 3, circuit 15S-LG6 (RD/WH), socket side and ground.
| | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between soldered connection S72 and the rear fog lamp shut-off relay using the Wiring Diagrams. CHECK the operation of the system. | | A13: CHECK THE REAR FOG LAMP CUT-OFF RELAY | NOTE:The fused jumper lead used in the previous test step is still connected to the headlamp switch. | | | 1 Ignition switch in position 0. | | | 2 Fused jumper lead (20A) at the rear fog lamp cut-off relay: - 3-door and 5-door versions: connect socket C2011, circuit (RD/WH), and circuit (VT/YE), socket side.
- All other models: connect socket C2011, pin 3, circuit 15S-LG6 (RD/WH) and pin 4, circuit 15S-LG6A (VT/YE), socket side.
| | | 3 Ignition switch in position II. | | | Do the rear fog lamps illuminate? Yes RENEW the rear fog lamp cut-off relay CHECK the operation of the system. No - 4-door versions: LOCATE and RECTIFY the break in circuit 15S-LG6A (VT/YE) between the rear fog lamp cut-off relay and the left-hand rear lamp assembly using the Wiring Diagrams. CHECK the operation of the system. | | A14: CHECK THE VOLTAGE SUPPLY TO THE REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (ESTATE) | NOTE:All models: The fused jumper lead used in the previous test step is still connected to the headlamp switch. | NOTE:Vehicles with trailer hitch: The fused jumper lead used in the previous step is still connected to the rear fog lamp cut-off relay. | | | 1 Ignition switch in position 0. | | | 2 Disconnect Rear lamp assembly. - LHD: Without trailer hitch: left from connector C476
- LHD: With trailer hitch: left from connector C2035
- RHD: Without trailer hitch: right from connector C477
- RHD: With trailer hitch: right from connector C2037
| | | 3 Ignition switch in position II. | | | | | | 4 Measure the voltage between the rear lamp cluster: - LHD: Without trailer hitch: left, connector C476, pin 2, circuit 15S-LD6 (GN/YE), wiring harness side and ground.
- LHD: With trailer hitch: left, connector C2035, pin 2, circuit 15S-LG6A (VT/YE), wiring harness side and ground.
- RHD: Without trailer hitch: right, connector C477, pin 2, circuit 15S-LD12 (GN/YE), wiring harness side and ground.
- RHD: With trailer hitch: right, connector C2037, pin 2, circuit 15S-LG6A (VT/YE), wiring harness side and ground.
| | | Does the meter display battery voltage? Yes No - Vehicles without trailer hitch: LOCATE and RECTIFY the break in the circuit between soldered connection S72 and the rear lamp assembly using the Wiring Diagrams. CHECK the operation of the system. - Vehicles with trailer hitch: LOCATE and RECTIFY the break in the circuit between the rear fog lamp cut-off relay and the rear lamp assembly using the Wiring Diagrams. CHECK the operation of the system. | | A15: CHECK THE GROUND CONNECTION TO THE REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (ESTATE) | | | 1 Ignition switch in position 0. | | | | | | 2 Measure the resistance between the rear lamp cluster: - LHD: Without trailer hitch: left, connector C476, pin 3, circuit 31-LF23 (F/G) (BK), wiring harness side and ground.
- LHD: With trailer hitch: left, connector C2035, pin 3, circuit 31-LF23 (F/G) (GN), wiring harness side and ground.
- RHD: Without trailer hitch: right, connector C477, pin 3, circuit 31-LF24A (BK), wiring harness side and ground.
- RHD: With trailer hitch: right, connector C2037, pin 3, circuit 31-LF24A (GN), wiring harness side and ground.
| | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary INSTALL A NEW rear lamp assembly. CHECK the operation of the system. No - LHD: LOCATE and RECTIFY the break in the circuit between the rear lamp assembly and ground connection G77 using the Wiring Diagrams. CHECK the operation of the system. - RHD: LOCATE and RECTIFY the break in the circuit between the rear lamp assembly and soldered connection S199 using the Wiring Diagrams. CHECK the operation of the system. | | A16: CHECK THE VOLTAGE SUPPLY TO THE REAR FOG LAMPS FOR OPEN CIRCUIT (3 DOOR AND 5-DOOR VERSIONS) | NOTE:All models: The fused jumper lead used in the previous test step is still connected to the headlamp switch. | NOTE:Vehicles with trailer hitch: The fused jumper lead used in the previous step is still connected to the rear fog lamp cut-off relay. | | | 1 Ignition switch in position 0. | | | 2 Disconnect Rear fog lamp. - LHD: Without trailer hitch: left from connector C434
- LHD: With trailer hitch: left from connector C2012
- RHD: Without trailer hitch: right from connector C430
- RHD: With trailer hitch: right from connector C2013
| | | 3 Ignition switch in position II. | | | | | | 4 Measure the voltage between rear fog lamps: - LHD: Without trailer hitch: left, connector C434, pin 1, circuit 15S-LD6(A) (GN/YE), wiring harness side and ground.
- LHD: With trailer hitch: left, connector C2012, pin 1, circuit (VT/YE), wiring harness side and ground.
- RHD: Without trailer hitch: right, connector C430, pin 1, circuit 15S-LG16(A) (GN/OG), wiring harness side and ground.
- RHD: With trailer hitch: right, connector C2013, pin 1, circuit (VT/YE), wiring harness side and ground.
| | | Is battery voltage measured? Yes No - Vehicles without trailer hitch: LOCATE and RECTIFY the break in the circuit(s) between soldered connection S72 and the rear fog lamp using the wiring diagrams. CHECK the operation of the system. - Vehicles with trailer hitch: LOCATE and RECTIFY the break in the circuit(s) between the rear fog lamp cut-off relay and the rear fog lamps using the Wiring Diagrams. CHECK the operation of the system. | | A17: CHECK THE GROUND CONNECTION TO THE REAR FOG LAMPS FOR OPEN CIRCUIT (3 DOOR AND 5-DOOR VERSIONS) | | | 1 Ignition switch in position 0. | | | | | | 2 Measure the resistance between rear fog lamps: - LHD: Without trailer hitch: left, connector C434, pin 2, circuit 31-LG16 (BK), wiring harness side and ground.
- LHD: With trailer hitch: left, connector C2012, pin 2, circuit (GN), wiring harness side and ground.
- RHD: Without trailer hitch: right, connector C430, pin 2, circuit 31-LD6 (BK), wiring harness side and ground.
- RHD: With trailer hitch: right, connector C2013, pin 2, circuit (GN), wiring harness side and ground.
| | | Is a resistance of less than 2 Ohms registered? Yes CHECK rear fog lamp and if necessary RENEW. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the rear fog lamp and soldered connection S199 using the Wiring Diagrams. CHECK the operation of the system. | | PINPOINT TEST B : ONE FOG LAMP IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: DETERMINE THE FAULT CONDITION | | | 1 Ignition switch in position II. | | | 2 Switch on the front fog lamps. | | | 3 Switch on the REAR FOG LIGHT. | | | 4 DETERMINE the fault conditions. | | | Is one front fog lamp inoperative? Yes - Left-hand front fog lamp inoperative: GO to B2. - Right-hand front fog lamp inoperative: GO to B4. No - Vehicles without trailer hitch: Left-hand rear fog lamp inoperative, 4-door versions: GO to B6. - Left-hand rear fog lamp inoperative, Cabriolet: GO to B10. - Vehicles with trailer hitch: Left-hand rear fog lamp inoperative, 4-door versions: GO to B7. - Right-hand rear fog lamp inoperative, 4-door versions: GO to B8. - Right-hand rear fog lamp inoperative, Cabriolet: GO to B12. | | B2: CHECK VOLTAGE SUPPLY OF LEFT-HAND FRONT FOG LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect left-hand front fog lamp from connector C302. | | | 3 Ignition switch in position II. | | | 4 Switch on the front fog lamps. | | | 5 Vehicles built before 01/2005: Measure the voltage between left-hand front fog lamp, connector C302, pin 1, circuit 15S-LD11 (GN/WH), wiring harness side and ground. | | | 6 Vehicles built from 01/2005: Measure the voltage between left-hand front fog lamp, connector C302, pin 1, circuit 15S-LD11 (GN/WH), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between soldered connection S108 and the front fog lamps using the Wiring Diagrams. CHECK the operation of the system. | | B3: CHECK GROUND CONNECTION OF LEFT-HAND FRONT FOG LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the front fog lamps. | | | 3 Vehicles built before 01/2005: Measure the resistance between left-hand front fog lamp, connector C302, pin 2, circuit 31-LD11 (BK), wiring harness side and ground. | | | 4 Vehicles built from 01/2005: Measure the resistance between left-hand front fog lamp, connector C302, pin 2, circuit 31-LD11 (BK), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the front fog lamp. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the front fog lamps and soldered connection S121 using the Wiring Diagrams. CHECK the operation of the system. | | B4: CHECK VOLTAGE SUPPLY OF RIGHT-HAND FRONT FOG LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect right-hand front fog lamp from connector C304. | | | 3 Ignition switch in position II. | | | 4 Switch on the front fog lamps. | | | 5 Vehicles built before 01/2005: Measure the voltage between right-hand front fog lamp, connector C304, pin 1, circuit 15S-LD17 (GN/WH), wiring harness side and ground. | | | 6 Vehicles built from 01/2005: Measure the voltage between right-hand front fog lamp, connector C304, pin 1, circuit 15S-LD17 (GN/WH), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between soldered connection S108 and the front fog lamps using the Wiring Diagrams. CHECK the operation of the system. | | B5: CHECK THE GROUND CONNECTION TO THE RIGHT-HAND FRONT FOG LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the front fog lamps. | | | 3 Vehicles built before 01/2005: Measure the resistance between right-hand front fog lamp, connector C304, pin 2, circuit 31-LD17 (BK), wiring harness side and ground. | | | 4 Vehicles built from 01/2005: Measure the resistance between right-hand front fog lamp, connector C304, pin 2, circuit 31-LD17 (BK), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the front fog lamp. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the front fog lamps and soldered connection S121 using the Wiring Diagrams. CHECK the operation of the system. | | B6: CHECK THE VOLTAGE SUPPLY TO THE LEFT-HAND REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (4-DOOR VERSIONS) | | | 1 Ignition switch in position 0. | | | 2 Disconnect left-hand rear lamp assembly from connector C476. | | | 3 Ignition switch in position II. | | | 4 SWITCH ON the rear fog lamps. | | | 5 Measure the voltage between the left-hand rear lamp assembly, connector C476, pin 7, circuit 15S-LD6C (GN/YE), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the left-hand rear lamp assembly and intermediate connector C112 using the Wiring Diagrams. CHECK the operation of the system. | | B7: CHECK THE GROUND CONNECTOIN TO THE LEFT-HAND REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (4-DOOR VERSIONS) | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the rear fog lamps. | | | 3 Disconnect Only vehicles with trailer hitch: left-hand rear lamp assembly from connector C2035. | | | 4 Measure the resistance between the left-hand rear lamp assembly: - Without trailer hitch: connector C476, pin 4, circuit 31-LF23 (C/D/E) (BK), wiring harness side and ground.
- With trailer hitch: connector C2035, pin 4, circuit 31-LF23 (GN), wiring harness side and ground.
| | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the left-hand rear lamp assembly. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the left-hand rear lamp assembly and ground connection G77 using the Wiring Diagrams. CHECK the operation of the system. | | B8: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (4-DOOR VERSIONS) | | | 1 Ignition switch in position 0. | | | 2 Disconnect Right-hand rear lamp assembly from connector. - Vehicles without trailer hitch: C477
- Vehicles with trailer hitch: C2037
| | | 3 Ignition switch in position II. | | | 4 SWITCH ON the rear fog lamps. | | | 5 Measure the voltage between the right-hand rear lamp assembly: - Vehicles without trailer hitch: connector C477, pin 2, circuit 15S-LD12 (GN/YE), wiring harness side and ground.
- Vehicles with trailer hitch: connector C2037, pin 2, circuit 15S-LG6B (VT/YE), wiring harness side and ground.
| | | Is battery voltage measured? Yes No - Vehicles without trailer hitch: LOCATE and RECTIFY the break in the circuit between the right-hand rear lamp assembly and intermediate connector C112 using the Wiring Diagrams. CHECK the operation of the system. - Vehicles with trailer hitch: LOCATE and RECTIFY the break in the circuit between the left-hand rear lamp assembly and the right-hand rear lamp assembly using the Wiring Diagrams. CHECK the operation of the system. | | B9: CHECK THE GROUND CONNECTION TO THE RIGHT-HAND REAR LAMP ASSEMBLY FOR OPEN CIRCUIT (4-DOOR VERSIONS) | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the rear fog lamps. | | | 3 Measure the resistance between the right-hand rear lamp assembly: - Vehicles without trailer hitch: connector C477, pin 4, circuit 31-LF24B (BK), wiring harness side and ground.
- Vehicles with trailer hitch: connector C2037, pin 4, circuit 31-LF24A (GN), wiring harness side and ground.
| | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the right-hand rear lamp assembly. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the right-hand rear lamp assembly and ground connection G70 using the Wiring Diagrams. CHECK the operation of the system. | | B10: CHECK THE VOLTAGE SUPPLY TO THE LEFT-HAND REAR LAMP ASSEMBLY (TAILGATE) FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Left-hand rear lamp assembly (tailgate) from connector C2320. | | | 3 Ignition switch in position II. | | | 4 SWITCH ON the rear fog lamps. | | | 5 Measure the voltage between the left-hand rear lamp assembly (tailgate), connector C2320, pin 1, circuit (GN/YE), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the left-hand rear lamp assembly (tailgate) and soldered connection S2010 using the Wiring Diagrams. CHECK the operation of the system. | | B11: CHECK THE GROUND SUPPLY TO THE LEFT-HAND REAR LAMP ASSEMBLY (TAILGATE) FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the rear fog lamps. | | | 3 Measure the resistance between the left-hand rear lamp assembly (tailgate), connector C2320, pin 3, circuit (BK), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the left-hand rear lamp assembly (tailgate). CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the left-hand rear lamp assembly (tailgate) and soldered connection S196 using the Wiring Diagrams. CHECK the operation of the system. | | B12: CHECK THE VOLTAGE SUPPLY TO THE RIGHT-HAND REAR LAMP ASSEMBLY (TAILGATE) FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Right-hand rear lamp assembly (tailgate) from connector C2321. | | | 3 Ignition switch in position II. | | | 4 SWITCH ON the rear fog lamps. | | | 5 Measure the voltage between the right-hand rear lamp assembly (tailgate), connector C2321, pin 1, circuit (GN/YE), wiring harness side and ground. | | | Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the right-hand rear lamp assembly (tailgate) and soldered connection S2010 using the Wiring Diagrams. CHECK the operation of the system. | | B13: CHECK THE GROUND SUPPLY TO THE RIGHT-HAND REAR LAMP ASSEMBLY (TAILGATE) FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 SWITCH OFF the rear fog lamps. | | | 3 Measure the resistance between the right-hand rear lamp assembly (tailgate), connector C2321, pin 3, circuit (BK), wiring harness side and ground. | | | Is a resistance of less than 2 Ohms registered? Yes CHECK and if necessary RENEW the right-hand rear lamp assembly (tailgate). CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the right-hand rear lamp assembly (tailgate) and soldered connection S196 using the Wiring Diagrams. CHECK the operation of the system. | | PINPOINT TEST C : REAR FOG LAMPS OR FRONT FOG LAMPS ILLUMINATE CONTINUOUSLY | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK THE HEADLIGHT SWITCH | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Ignition switch in position II. | | | 4 CHECK fog lamps. | | | Are the front fog lamps or the rear fog lamp(s) lit up? Yes - Front fog lamps permanently lit: GO to C3. - Vehicles without trailer hitch: Rear fog lamp(s) permanently lit: GO to C3. - Vehicles with trailer hitch: Rear fog lamp(s) permanently lit: GO to C2. No INSTALL A NEW headlight switch. CHECK the operation of the system. | | C2: NARROW DOWN THE FAULT CONDITION | | | 1 Ignition switch in position 0. | | | 2 Disconnect Rear fog lamp cut-off relay from socket C2011. | | | 3 Ignition switch in position II. | | | Do the rear fog lamps illuminate? Yes - LHD: 3-door and 5-door versions: LOCATE and RECTIFY the short to battery voltage in the circuits connected to the left-hand rear fog lamp, connector C2012, pin 1 using the Wiring Diagrams. CHECK the operation of the system. - RHD: 3-door and 5-door versions: LOCATE and RECTIFY the short to battery voltage in the circuits connected to the right-hand rear fog lamp, connector C2013, pin 1 using the Wiring Diagrams. CHECK the operation of the system. - All other models: LOCATE and RECTIFY the short to battery voltage in the circuits connected to the rear fog lamp cut-off relay, connector C2011, pin 4 using the Wiring Diagrams. CHECK the operation of the system. No | | C3: EXCLUDE THE INSTRUMENT CLUSTER AS THE CAUSE OF THE FAULT | | | 1 Ignition switch in position 0. | | | 2 Connect Only vehicles with trailer hitch: Rear fog lamp cut-off relay to socket C2011. | | | 3 Disconnect fuse F67 (10 A) (CJB). | | | 4 Disconnect fuse F46 (10 A) (CJB). | | | 5 Ignition switch in position II. | | | 6 CHECK fog lamps. | | | Are the front fog lamps or the rear fog lamp(s) lit up? Yes - Front fog lamp permanently lit: LOCATE and RECTIFY the short to battery voltage in the circuits connected to soldered connection S71 using the Wiring Diagrams. CHECK the operation of the system. - Rear fog lamp(s) permanently lit: LOCATE and RECTIFY the short to battery voltage in the circuits connected to soldered connection S72 using the Wiring Diagrams. CHECK the operation of the system. No Install a new instrument cluster. CHECK the operation of the system. | | PINPOINT TEST D : FOG LAMP WARNING LAMP IN THE INSTRUMENT CLUSTER INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: DETERMINE THE FAULT CONDITION | | | 1 Ignition switch in position II. | | | 2 Switch on the front fog lamps. | | | 3 Switch on the REAR FOG LIGHT. | | | 4 CHECK the operation of the warning lamp in both switch positions. | | | Are both telltales inoperative? Yes Install a new instrument cluster. CHECK the operation of the system. No - The front fog lamp warning lamp is inoperative: GO to D2. - Rear fog lamp warning lamp is inoperative: GO to D3. | | D2: CHECK THE SIGNAL LINE FOR THE FRONT FOG LAMP WARNING LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Disconnect Instrument cluster from connector C809. | | | 4 Measure resistance between headlamp switch, connector C320, pin 3, circuit 15S-LD7A (GN/BU), wiring harness side and instrument cluster, connector C809, pin 16, circuit 15S-LD7 (GN/BU) wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes Install a new instrument cluster. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between soldered connection S71 and the instrument cluster using the Wiring Diagrams. CHECK the operation of the system. | | D3: CHECK THE SIGNAL LINE FOR THE REAR FOG LAMP WARNING LAMP FOR OPEN CIRCUIT | | | 1 Ignition switch in position 0. | | | 2 Disconnect Headlight switch from connector C320. | | | 3 Disconnect Instrument cluster from connector C809. | | | 4 Measure resistance between headlamp switch, connector C320, pin 2, circuit 15S-LD13A (GN/OG), wiring harness side and instrument cluster, connector C809, pin 1, circuit 15S-LD13 (GN/OG) wiring harness side. | | | Is a resistance of less than 2 Ohms registered? Yes Install a new instrument cluster. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between soldered connection S72 and the instrument cluster using the Wiring Diagrams. CHECK the operation of the system. | |
