PINPOINT TEST A : REAR FOG LAMPS OR FRONT FOG LAMPS INOPERATIVE |
TEST CONDITIONS | DETAILS/RESULTS/ACTIONS |
A1: DETERMINE THE CONDITIONS UNDER WHICH THE FAULT OCCURS |
| 1 Ignition switch in position II. |
| 2 SWITCH ON dipped beam. |
| 3 SWITCH ON the front and rear fog lamps. |
| 4 CHECK fog lamps. |
| Are the front fog lamps inoperative? Yes No - The rear fog lamps are inoperative with dipped beam switched on: GO to A10. - Rear fog lamps inoperative, with switched-on parking lamps and switched-on front fog lamps: GO to A20. |
A2: CHECK FUSE F29 (20 A) (CJB) |
| 1 Ignition switch in position 0. |
| 2 Disconnect fuse F29 (20 A) (CJB). |
| 3 CHECK fuse F29 (20 A) (CJB). |
| Is the fuse OK? Yes No RENEW fuse F29 (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. |
A3: CHECK THE VOLTAGE SUPPLY TO FUSE F29 (20A) (CJB) FOR OPEN CIRCUIT |
| 1 Connect fuse F29 (20 A) (CJB). |
| 2 Ignition switch in position II. |
| 3 Measure the voltage between fuse F29 (20 A) (CJB) and ground. |
| Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse F29 (20A) (CJB) with the aid of the wiring diagrams. If necessary RENEW the CJB. CHECK the operation of the system. |
A4: CHECK THE VOLTAGE AT THE FRONT FOG LAMP SWITCH |
| 1 Ignition switch in position 0. |
| 2 Disconnect front fog lamp switch from connector C166. |
| 3 Ignition switch in position II. |
| 4 SWITCH ON dipped beam. |
| 5 Measure the voltage between the front fog lamp switch, connector C166, pin 2, circuit 29S-LD10 (OG/GN), wiring harness side and ground. |
| Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the front fog lamp switch and soldered connection S12 using the wiring diagrams. CHECK the operation of the system. |
A5: CHECK FRONT FOG LAMP SWITCH |
| 1 Ignition switch in position 0. |
| 2 SWITCH OFF the dipped beam. |
| 3 Using a fused bridging cable (10 A) at the front fog lamp switch, connect between connector C166, pin 2, circuit 29S-LD10 (OG/GN) and pin 1, circuit 29S-LD8 (OG), wiring harness side. |
| 4 Ignition switch in position II. |
| 5 SWITCH ON dipped beam. |
| 6 CHECK the front fog lamps. |
| Do the front fog lamps illuminate? Yes RENEW the front fog lamp switch. CHECK the operation of the system. No |
A6: CHECK CIRCUIT 29S-LD8 (OG) BETWEEN THE FRONT FOG LAMP SWITCH AND THE FRONT FOG LAMP RELAY FOR OPEN CIRCUIT (CONTROL CIRCUIT) |
| 1 Ignition switch in position 0. |
| 2 SWITCH OFF the dipped beam. |
| 3 Disconnect front fog lamp relay from socket C148. |
| 4 Measure the resistance between the front fog lamp switch, connector C166, pin 1, circuit 29S-LD8 (OG), wiring harness side and the front fog lamp relay, socket C148, pin 2 circuit 29S-LD8 (OG), CJB side. |
| Is a resistance of less than 2 Ohm registered? Yes No LOCATE and RECTIFY the break in the circuit between the front fog lamp switch and the front fog lamp relay using the wiring diagrams. CHECK the operation of the system. |
A7: CHECK GROUND CONNECTION OF FRONT FOG LAMP RELAY FOR OPEN CIRCUIT |
| 1 Measure the resistance between the front fog lamp relay, socket C148, pin 1, circuit 31-LD8 (BK), CJB side and ground. |
| Is a resistance of less than 2 Ohm registered? Yes No LOCATE and RECTIFY the break in the circuit between the front fog lamp relay and soldered connection S14 using the wiring diagrams. CHECK the operation of the system. |
A8: CHECK VOLTAGE SUPPLY TO THE FRONT FOG LAMP RELAY FOR OPEN CIRCUIT (POWER CIRCUIT) |
| 1 Ignition switch in position II. |
| 2 Measure the voltage between the front fog lamp relay, socket C148, pin 3, circuit 14-LD9 (VT/BK), CJB side and ground. |
| Does the meter display battery voltage? Yes No LOCATE and RECTIFY break in circuit between front fog lamp relay and fuse F29 (CJB) using the Wiring Diagrams. CHECK the operation of the system. |
A9: CHECK FRONT FOG LAMP RELAY |
| 1 Connect a fused jumper wire (20 A) to the front fog lamp relay, socket C148, pin 3, circuit 14-LD9 (VT/BK) and pin 5, circuit 14S-LD1 (VT/YE), CJB side. |
| 2 Ignition switch in position II. |
| 3 CHECK the front fog lamps. |
| Do the front fog lamps illuminate? Yes RENEW the front fog lamp relay. CHECK the operation of the system. No LOCATE and RECTIFY the break in circuit 14S-LD1 (VT/YE), between the front fog lamp relay and soldered connection S22 using the Wiring Diagrams. CHECK the operation of the system. |
A10: CHECK FUSE F21 (10 A) (CJB) |
| 1 Ignition switch in position 0. |
| 2 Disconnect fuse F21 (10 A) (CJB). |
| 3 CHECK fuse F21 (10 A) (CJB). |
| Is the fuse OK? Yes No RENEW fuse F21 (10 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. |
A11: CHECK THE VOLTAGE SUPPLY TO FUSE F21 (10A) (CJB) FOR OPEN CIRCUIT |
| 1 Connect fuse F21 (10 A) (CJB). |
| 2 Ignition switch in position II. |
| 3 SWITCH ON dipped beam. |
| 4 Measure the voltage between fuse F21 (10 A) (CJB) and ground. |
| Does the meter display battery voltage? Yes No LOCATE AND RECTIFY the break in the voltage supply of fuse F21 (10A) (CJB) with the aid of the wiring diagrams. If necessary RENEW the CJB. CHECK the operation of the system. |
A12: TEST THE VOLTAGE AT THE HEATER CONTROL MODULE (POWER CIRCUIT) |
| 1 Ignition switch in position 0. |
| 2 Disconnect heater control module from connector C109. |
| 3 Ignition switch in position II. |
| 4 Measure the voltage between the heater control module, connector C109, pin 1, circuit 14S-LD16B (VT), wiring harness side and ground. |
| Does the meter display battery voltage? Yes No |
A13: CHECK CIRCUIT 14S-LD22 (VT/WH) FOR OPEN CIRCUIT |
| 1 Ignition switch in position 0. |
| 2 Disconnect Rear fog lamp blocking diode from connector C1002. |
| 3 Ignition switch in position II. |
| 4 SWITCH ON dipped beam. |
| 5 Measure the voltage between the rear fog lamp blocking diode, connector C1002, pin 1, circuit 14S-LD22 (VT/WH), wiring harness side and ground. |
| Does the meter display battery voltage? Yes No LOCATE and RECTIFY break in circuit between fuse F21 (CJB) and rear fog lamp blocking diode with the aid of the wiring diagrams. CHECK the operation of the system. |
A14: CHECK CIRCUIT 14S-LD16(A/B) (VT) FOR OPEN CIRCUIT |
| 1 Ignition switch in position 0. |
| 2 Measure the resistance between the rear fog lamp blocking diode, connector C1002, circuit 14S-LD16A (VT), wiring harness side and heater control module, connector C109, pin 1, circuit 14S-LD16B (VT), wiring harness side. |
| Is a resistance of less than 2 Ohm registered? Yes RENEW the rear fog lamp blocking diode CHECK the operation of the system. No LOCATE and REPAIR the open circuit between the rear fog lamp blocking diode and the heater control module using the Wiring Diagrams. CHECK the operation of the system. |
A15: CHECK VOLTAGE SUPPLY OF HEATER CONTROL MODULE FOR OPEN CIRCUIT |
| 1 Ignition switch in position II. |
| 2 Measure the voltage between the heater control module, connector C109, pin 8, circuit 14-CA83A (VT/OG), wiring harness side and ground. |
| Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the heater control module and soldered connection S13 using the Wiring Diagrams. CHECK the operation of the system. |
A16: CHECK VOLTAGE SUPPLY OF HEATER CONTROL MODULE FOR OPEN CIRCUIT |
| 1 Measure the voltage between the heater control module, connector C109, pin 9, circuit 29-CA83 (OG/GN), wiring harness side and ground. |
| Does the meter display battery voltage? Yes No LOCATE and RECTIFY the break in the circuit between the heater control module and soldered connection S16 using the Wiring Diagrams. CHECK the operation of the system. |
A17: CHECK GROUND CONNECTION OF HEATER CONTROL MODULE FOR OPEN CIRCUIT |
| 1 Ignition switch in position 0. |
| 2 Measure the resistance between the heater control module, connector C109, pin 2, circuit 91-CA83 (BK/RD), wiring harness side and ground. |
| Is less than 2 Ohm measured? Yes No LOCATE and RECTIFY the break in the circuit between the heater control module and soldered connection S76 using the Wiring Diagrams. CHECK the operation of the system. |
A18: CHECK HEATER CONTROL MODULE |
| 1 Connect a fused jumper wire (10 A) at the heater control module, connector C109, between pin 9, circuit 29-CA83 (OG/GN) and pin 7, circuit 14S-LD6 (VT/YE), wiring harness side. |
| Are all rear fog lamps lit? Yes RENEW the heater control module. CHECK the operation of the system. No |
A19: CHECK THE GROUND CONNECTION OF THE REAR FOG LAMPS |
| 1 Ignition switch in position 0. |
| 2 Disconnect left-hand rear fog lamp from connector C196. |
| 3 Measure the resistance between the left-hand rear fog lamp, connector C196, pin 2, circuit 31-LD6A (BK), wiring harness side and ground. |
| Is less than 2 Ohm measured? Yes LOCATE and RECTIFY the break in circuit 14S-LD6 (VT/YE), between the heater control module and soldered connection S122 using the Wiring Diagrams. CHECK the operation of the system. No LOCATE and REPAIR the break in the circuits 31-LF5 (BK) and 31-LD20 (BK), between soldered connection S120 and soldered connection S24, using the wiring diagrams. CHECK the operation of the system. |
A20: CHECK CIRCUIT 14S-LD21 (VT/YE) FOR OPEN CIRCUIT |
| 1 Ignition switch in position 0. |
| 2 Disconnect Front fog lamp blocking-diode from connector C1001. |
| 3 Measure the resistance between the front fog lamp blocking diode, connector C1001, circuit 14S-LD21 (VT/YE), wiring harness side and ground. |
| Is less than 10,000 Ohm measured? Yes RENEW the front fog lamp blocking diode. CHECK the operation of the system. No LOCATE and RECTIFY the break in the circuit between the front fog lamp blocking diode and soldered connection S22 using the Wiring Diagrams. CHECK the operation of the system. |