Self-Diagnostic System
NOTE:
For further information of self-diagnostic system, see
MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article.
- For preliminary testing, see TROUBLE SHOOTING
. If problem is not found, check Generic Electronic Module (GEM) for Diagnostic Trouble Codes (DTCs). Connect New Generation STAR (NGS) tester, or equivalent scan tool, to Data Link Connector (DLC) located below center of instrument panel. Using NGS tester, perform DATA LINK DIAGNOSTIC TEST. If NGS tester displays CKT914, CKT915 or CKT70 = ALL ECUS NO RESP/NOT EQUIP, see
MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER article to diagnosis network concern. If NGS tester displays NO RESP/NOT EQUIP for GEM, perform TEST J: NO SCAN TOOL COMMUNICATION WITH GEM
under SYSTEM TESTS.
- If NGS tester displays SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using NGS tester, perform GEM self-test. If GEM DTCs related to the concern are retrieved, see GEM DTC TEST INDEX
table to continue diagnosis. If no DTCs related to the concern are retrieved, perform appropriate test based on symptom. See SYMPTOM INDEX
table under SYSTEM TESTS. For GEM DTCs not covered in this article, see
MODULE COMMUNICATIONS NETWORK - EXPLORER & MOUNTAINEER.
GEM DTC TEST INDEX
| DTC |
Description |
Perform Test |
| B1302 |
Accessory Delay Relay Coil Circuit Failure |
A |
| B1304 |
Accessory Delay Relay Coil Circuit Open Or Short To Power |
A |
| B1313 |
Battery Saver Relay Coil Circuit Failure |
A |
| B1315 |
Battery Saver Relay Coil Circuit Short To Power |
A |
| B1342 |
GEM Defective |
|
| B1398 |
Power Window One-Touch Down Relay Circuit Failure |
|
| B1400 |
Power Window One-Touch Down Relay Coil Circuit Short To Power |
|
| B1404 |
Driver's Door Power Window Down Circuit Open |
|
| B1405 |
Driver's Door Power Window Down Circuit Short To Power |
|
| B1410 |
Driver's Door Power Window Motor Circuit Failure |
|
| B1475 |
Accessory Delay Relay Contacts Short To Power |
|