| Diagnosis and Testing Refer to Wiring Diagrams Section 417-02, for schematic and connector information. Inspection and Verification - Verify the customer concern.
- Visually inspect for obvious signs of electrical damage.
Visual Inspection Chart | Electrical | | Fuse(s) | | Transportation fuse pack | | Wiring harness | | Electrical connector(s) | | Bulb(s) | | Lamp(s) | | Switch(es) | | Generic Electronic Module (GEM) | - 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 Chart | Symptom | Possible Sources | Action | | The interior lamp is inoperative | * Bulb. * Circuit(s). * Interior lamp switch. * Interior lamp. * GEM. | * | | The interior lamp does not automatically turn off after 10 minutes when the lamp is in the ILLUMINATED ENTRY position | * GEM. * Circuit. | * CHECK circuit 31S-LC7 (BK/BU) for short to ground. If the circuit is OK, INSTALL a new GEM.
REFER to: Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Removal and Installation).
TEST the system for normal operation. | | The interior lamp does not automatically turn off after 30 minutes when the lamp is in the ON position | * GEM. | * INSTALL a new GEM.
REFER to: Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Removal and Installation).
TEST the system for normal operation. | | The luggage compartment lamp is inoperative | * Fuse. * Bulb. * Circuit(s). * Liftgate switch. * Luggage compartment lamp. * GEM. | * | Pinpoint Tests NOTE:Use a digital multimeter for all electrical measurements. | PINPOINT TEST A : THE INTERIOR LAMP IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | A1: CHECK THE OPERATION OF THE INTERIOR LAMP | | | 1 Check the operation of the interior lamp in both ON and ILLUMINATED ENTRY positions. | | | Is the interior lamp inoperative in both positions? Yes No If inoperative in the ON position, GO to A3. If inoperative in the ILLUMINATED ENTRY position, GO to A4. | | A2: CHECK THE INTERIOR LAMP FOR POWER | | | 1 Disconnect Lamp C104A. | | | 2 Ignition switch in position II. | | | 3 Ignition switch in position 0. | | | 4 Measure the voltage between the interior lamp C104A pin 1, circuit 29-LC7 (OG/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes INSTALL a new interior lamp. TEST the system for normal operation. No REPAIR the circuit. TEST the system for normal operation. | | A3: CHECK THE INTERIOR LAMP CIRCUIT FOR GROUND | | | 1 Disconnect Lamp C104. | | | 2 Measure the resistance between the interior lamp C104 pin 3, 31-LC7 (BK), harness side and ground. | | | Is the resistance less than 5 ohms? Yes INSTALL a new interior lamp. TEST the system for normal operation. No REPAIR circuit 31-LC7 (BK). TEST the system for normal operation. | | A4: CHECK THE INTERIOR LAMP FOR GROUND WITH THE DRIVER DOOR OPEN | | | 1 Disconnect Lamp C104. | | | 2 Open the driver door. | | | 3 Measure the resistance between the interior lamp C104 pin 1, 31S-LC7 (BK/BU), harness side and ground. | | | Is the resistance less than 5 ohms? Yes INSTALL a new interior lamp. TEST the system for normal operation. No | | A5: CHECK CIRCUIT 31S-LC7 (BK/BU) FOR OPEN | | | 1 Disconnect GEM C170. | | | 2 Measure the resistance between the interior lamp C104 pin 1, 31S-LC7 (BK/BU), harness side and the GEM C170 pin 3, circuit 31S-LC7 (BK/BU), harness side. | | | Is the resistance less than 5 ohms? Yes No REPAIR circuit 31S-LC7 (BK/BU). TEST the system for normal operation. | | A6: CHECK THE DRIVER SIDE INTERIOR LAMP SWITCH CIRCUIT FOR OPEN | | | 1 Disconnect Driver Side Interior Lamp Switch C124 (LHD) or C125 (RHD). | | | 2 Measure the resistance between: - (LHD) the GEM C170 pin 18, circuit 31S-LC9 (BK/RD) and the driver side interior lamp switch C124 pin 1, harness side.
- (RHD) the GEM C170 pin 19, circuit 31S-LC21 (BK/GN) and the driver side interior lamp switch C125 pin 1, harness side.
| | | Is the resistance less than 5 ohms? Yes INSTALL a new GEM.
REFER to: Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Removal and Installation).
No REPAIR circuit 31S-LC9 (BK/RD) or circuit 31S-LC21 (BK/GN). TEST the system for normal operation. | | PINPOINT TEST B : THE LUGGAGE COMPARTMENT LAMP IS INOPERATIVE | | TEST CONDITIONS | DETAILS/RESULTS/ACTIONS | | B1: CHECK THE LUGGAGE COMPARTMENT LAMP FOR POWER | | | 1 Disconnect Luggage Compartment Lamp C130. | | | 2 Ignition switch in position II. | | | 3 Ignition switch in position 0. | | | 4 Measure the voltage between the luggage compartment lamp C130 pin 1, circuit 29-LB25 (OG/BU), harness side and ground. | | | Is the voltage greater than 10 volts? Yes No REPAIR circuit 29-LB25 (OG/BU). TEST the system for normal operation. | | B2: CHECK THE LUGGAGE COMPARTMENT LAMP FOR GROUND | | | 1 Open the liftgate. | | | 2 Measure the resistance between the luggage compartment lamp C130 pin 2, circuit 31-LB25 (BK), harness side and ground. | | | Is the resistance less than 5 ohms? Yes INSTALL a new luggage compartment lamp. TEST the system for normal operation. No | | B3: CHECK CIRCUIT 31S-LB26 (BK/OG) FOR OPEN | | | 1 Disconnect Liftgate Switch C180. | | | 2 Disconnect GEM C170. | | | 3 Measure the resistance between the luggage compartment lamp C180 pin 3, circuit 31S-LB26 (BK/OG), harness side and the GEM C170 pin 20, circuit 31S-LB26 (BK/OG), harness side. | | | Is the resistance less than 5 ohms? Yes No REPAIR circuit 31S-LB26 (BK/OG). TEST the system for normal operation. | | B4: CHECK CIRCUIT 31-LB26 (BK) FOR OPEN | | | 1 Measure the resistance between the luggage compartment lamp C180 pin 2, circuit 31-LB26 (BK) and ground. | | | Is the resistance less than 5 ohms? Yes INSTALL a new liftgate switch. If the concern persists, INSTALL a new GEM.
REFER to: Generic Electronic Module (GEM) (419-10 Multifunction Electronic Modules, Removal and Installation).
TEST the system for normal operation. No REPAIR circuit 31-LB26 (BK). TEST the system for normal operation. | |
