Inspection and Verification
- Verify the customer concern by operating the system.
- Visually inspect for obvious signs of mechanical and electrical damage. VISUAL INSPECTION CHART Mechanical Electrical Damaged components Central junction box (CJB) fuse 27 (10A) Wiring harness Loose, damaged or corroded connectors Interior map lamp, dome lamp, cargo lamp
- If an obvious cause for an observed of reported concern is found, correct the cause (if possible) before proceeding to the next step.
- If the diagnostic tool does not power up, refer to the .
- Carry out the DATA LINK DIAGNOSTICS test. If the diagnostic tool responds with: CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, refer to «MODULE COMMUNICATIONS NETWORK»(ref-177213) . NO RESP/NOT EQUIP for GEM, Refer to «MULTIFUNCTION ELECTRONIC MODULE»(ref-204647) . SYSTEM PASSED, retrieve and record the continuous diagnostic trouble codes (DTCs), erase the continuous DTCs, and carry out the self-test diagnostics for the GEM.
- If the DTCs retrieved are related to the concern, go to the GEM Diagnostic Trouble Code (DTC) Index to continue diagnostics. See «GEM DIAGNOSTIC TROUBLE CODE INDEX»(ref-204641-S08394246912005111200000) .
- If no DTCs related to the concern are retrieved, proceed to the Symptom Chart to continue diagnostics.
- If the DTCs are retrieved that are not found in the following GEM Diagnostic Trouble Code (DTC) Index, refer to «MULTIFUNCTION ELECTRONIC MODULE»(ref-204647) .
GEM Diagnostic Trouble Code (DTC) Index
| DTC | Description | Source | Action |
|---|---|---|---|
| B1317 | Battery Voltage High | GEM | GO to PINPOINT TEST F . |
| B1318 | Battery Voltage Low | GEM | GO to PINPOINT TEST F . |
| B1319 | Driver Door Ajar Circuit Failure | GEM | GO to PINPOINT TEST B . |
| B1327 | Passenger Door Ajar Circuit Failure | GEM | GO to PINPOINT TEST B . |
| B1331 | Decklid Ajar Rear Door Circuit Failure | GEM | GO to PINPOINT TEST B . |
| B1335 | Door Ajar RR Circuit Failure | GEM | Go To PINPOINT TEST B . |
| B1371 | Illuminated Entry Relay Circuit Failure | GEM | If the interior lamps are inoperative, GO to PINPOINT TEST A . If the interior lamps stay on continuously/do not fade out, GO to PINPOINT TEST B . |
| B1571 | Door Ajar LR Circuit Failure | GEM | Go To PINPOINT TEST B . |
| All other DTCs | GEM | REFER to MULTIFUNCTION ELECTRONIC MODULE . |
GEM DIAGNOSTIC TROUBLE CODE (DTC) INDEX
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| No communication with the generic electronic module (GEM) | Central junction box (CJB) fuse 27 (10A). Circuitry. GEM. | REFER to MULTIFUNCTION ELECTRONIC MODULE . |
| The interior lamps are inoperative | Circuitry. Dome/cargo lamp. GEM. | GO to PINPOINT TEST A . |
| The interior lamps stay on continuously do not fade out | Circuit. Map/dome lamp switch. GEM. | GO to PINPOINT TEST B . |
| The interior lamps do not turn on with one door open | Circuit. Door/liftgate ajar switch. GEM. | GO to PINPOINT TEST C . |
| The illuminated entry is inoperative when using the remote transmitter | Remote transmitter. GEM. | GO to PINPOINT TEST D . |
| The demand lighting is inoperative | Circuitry. Dome/map lamp. GEM. | GO to PINPOINT TEST E . |
| An individual interior lamp is inoperative | Power supply. Ground. Bulb. | REPAIR as necessary. |
| An individual demand lamp is inoperative | Power supply. Ground. Bulb. | REPAIR as necessary. |
| Battery voltage out of range | Circuitry. GEM. Charging system. | GO to PINPOINT TEST F . |
SYMPTOM CHART
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Scheme 23
- Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-204629) .
- Remove the interior/map reading lamp lens.
- Remove the interior/map reading lamp assembly. Remove the screws. Remove the interior/map reading lamp. Disconnect the electrical connector.
- To install, reverse the removal procedure.
Scheme 24
Scheme 25
- Disconnect the battery ground cable. For additional information, refer to «BATTERY, MOUNTING AND CABLES»(ref-204629) .
- Remove the cargo lamp assembly from the headliner.
- Remove the cargo lamp assembly. Disconnect the electrical connectors. Remove the cargo lamp assembly.
- To install, reverse the removal procedure.