| Diagnosis and Testing Refer to Wiring Diagrams Section 417-02, for schematic and connector information. Worldwide Diagnostic System (WDS) Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart | Electrical | - Fuse(s)
- Bulb(s)
- Switch(es)
- Relay(s)
- Wiring harness
- Central junction box (CJB)
- Instrument cluster
- Lamp(s)
| - If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step
- If the cause is not visually evident, verify the symptom and refer to the Symptom Chart.
Symptom Chart | Symptom | Possible Sources | Action | | The interior lamps are inoperative | * Circuit(s). * Battery saver relay. * Interior lamp. * CJB. * Instrument cluster. | * | | The centre interior lamp is inoperative | * Circuit(s). * Centre interior lamp. | * | | The rear interior lamp is inoperative | * Circuit(s). * Rear interior lamp. | * | | The interior lamps do not turn on with one door open | * Door ajar switch(es). * Instrument cluster. | * REFER to the WDS. | | * Circuit(s). * Front interior lamp. * Interior lamp relay. * CJB. * Instrument cluster. | * | | The battery saver does not operate correctly | * Instrument cluster. | * REFER to the WDS. | Pinpoint Test | PINPOINT TEST A : THE INTERIOR LAMPS ARE INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK CIRCUIT 29-LC7B (OG/BU) FOR VOLTAGE | | | 1 Disconnect Interior Lamp C899. | | | 2 Measure the voltage between the front interior lamp C899 pin 1, circuit 29-LC7B (OG/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes INSTALL a new front interior lamp. TEST the system for normal operation. No | | A2: CHECK CIRCUIT 29-LC7B (OG/BU) FOR OPEN CIRCUIT | CAUTION:Take care not to damage the CJB electrical connector when back-probing the pin. | | | 1 Measure the resistance between the front interior lamp C899 pin 1, circuit 29-LC7B (OG/BU), harness side and the CJB C14 pin 9, circuit 29-LC7 (OG/BU), harness side. | | | Is the resistance less than 1 ohm? Yes No REPAIR the circuit. TEST the system for normal operation. | | A3: CJB INPUT AND TIMER FUNCTION TESTS | | | 1 Using the WDS, carry out a CJB test. | | | Does the CJB pass the WDS test? Yes No INSTALL a new CJB. TEST the system for normal operation. | | A4: CHECK CIRCUIT 31S-LC22 FOR OPEN CIRCUIT | CAUTION:Take care not to damage the CJB electrical connector when back-probing the pin. | | | 1 Disconnect Instrument Cluster C809. | | | 2 Measure the resistance between the CJB C11 pin 9, circuit 31S-LC22 (BK/OG), harness side and the instrument cluster C809 pin 9, circuit 31S-LC22 (BK/OG), harness side. | | | Is the resistance less than 1 ohm? Yes INSTALL a new instrument cluster.
REFER to: Instrument Cluster (413-01 Instrument Cluster, Removal and Installation).
TEST the system for normal operation. If the concern persists, INSTALL a new CJB. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST B : THE CENTRE INTERIOR LAMP IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK CIRCUIT 29-LB25A (OG/BU) FOR VOLTAGE | | | 1 Disconnect Centre Interior Lamp C820. | | | 2 Measure the voltage between the centre interior lamp C820 pin 2, circuit 29-LB25A (OG/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR the circuit. TEST the system for normal operation. | | B2: CHECK CIRCUIT 31S-LB25A (BK/BU) FOR OPEN CIRCUIT | | | 1 Disconnect Centre Interior Lamp C819. | | | 2 Disconnect Front Interior Lamp C892. | | | 3 Measure the resistance between the centre interior lamp C819 pin 1, circuit 31S-LB25A (BK/BU), harness side and the front interior lamp C892 pin 1, circuit 31S-LB25A (BK/BU), harness side. | | | Is the resistance less than 1 ohm? Yes INSTALL a new centre interior lamp. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST C : THE INTERIOR REAR LAMP IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | C1: CHECK CIRCUIT 29-LB25B (OG/BU) FOR VOLTAGE | | | 1 Disconnect Rear Interior Lamp C822. | | | 2 Measure the voltage between the rear interior lamp C822 pin 2, circuit 29-LB25B (OG/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR the circuit. TEST the system for normal operation. | | C2: CHECK CIRCUIT 31S-LB25B (BK/BU) FOR OPEN CIRCUIT | | | 1 Disconnect Rear Interior Lamp C821. | | | 2 Disconnect Front Interior Lamp C892. | | | 3 Measure the resistance between the rear interior lamp C821 pin 1, circuit 31S-LB25B (BK/BU), harness side and the front interior lamp C892 pin 1, circuit 31S-LB25B (BK/BU), harness side. | | | Is the resistance less than 1 ohm? Yes INSTALL a new rear interior lamp. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | PINPOINT TEST D : THE INTERIOR LAMPS DO NOT TURN ON WITH ONE DOOR OPEN | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | D1: CHECK CIRCUIT 31S-LC7 FOR GROUND | | | 1 Disconnect Front Interior Lamp C890. | | | 2 Open the driver side door. | | | 3 Measure the resistance between the front interior lamp C890 pin 1, circuit 31S-LC7 (BK/BU), harness side and ground. | | | Is the resistance less than 1 ohm? Yes INSTALL a new front interior lamp. TEST the system for normal operation. No | | D2: CHECK CIRCUIT 31S-LC7 FOR OPEN CIRCUIT | CAUTION:Take care not to damage the CJB electrical connector when back-probing the pin. | | | 1 Measure the resistance between the front interior lamp C890 pin 1, circuit 31S-LC7 (BK/BU), harness side and the CJB C14 pin 5, circuit 31S-LC7 (BK/BU) harness side. | | | Is the resistance less than 1 ohm? Yes No REPAIR the circuit. TEST the system for normal operation. | | D3: CHECK CIRCUIT 31-DA1 FOR OPEN CIRCUIT | CAUTION:Take care not to damage the CJB electrical connector when back-probing the pin. | | | 1 Measure the resistance between the CJB C14 pin 1, circuit 31-DA1 (BK) harness side and ground. | | | Is the resistance less than 1 ohm? Yes No REPAIR the circuit. TEST the system for normal operation. | | D4: CJB INPUT AND TIMER FUNCTION TESTS | | | 1 Using the WDS, carry out a CJB test. | | | Does the CJB pass the WDS test? Yes No INSTALL a new CJB. TEST the system for normal operation. | | D5: CHECK CIRCUIT 31S-LC18 (BK/BU) FOR OPEN CIRCUIT | CAUTION:Take care not to damage the CJB electrical connector when back-probing the pin. | | | 1 Disconnect Instrument Cluster C809. | | | 2 Measure the resistance between the instrument cluster C809 pin 12, circuit 31S-LC18 (BK/BU), harness side and the CJB C11 pin 11, circuit 31S-LC18 (BK/BU), harness side. | | | Is the resistance less than 1 ohm? Yes INSTALL a new CJB. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | |
