Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Self-Diagnostic System
Connect Worldwide Diagnostic System (WDS) tester or New Generation Star (NGS) tester to Data Link Connector (DLC), DLC is located below instrument panel. See Fig 1. Using WDS or NGS tester, perform data link diagnostics test. See DATA LINK DIAGNOSTIC TEST under SELF-DIAGNOSTIC SYSTEM in appropriate MODULE COMMUNICATIONS NETWORK article. If WDS or NGS tester responds with CKT914, CKT915 or CKT70=ALL ECUS NO RESP/NOT EQUIP, repair module communications concern. See appropriate MODULE COMMUNICATIONS NETWORK article. If WDS or NGS tester displays NO RESP/NOT EQUIP for Generic Electronic Module (GEM), perform TEST X: NO COMMUNICATION WITH GENERIC ELECTRONIC MODULE under SYSTEM TESTS.
If WDS or NGS tester responds with SYSTEM PASSED, retrieve and record continuous DTCs. Erase continuous DTCs. Using WDS or NGS tester, perform GEM self-test. Perform appropriate test in accordance with DTC retrieved. See GENERIC ELECTRONIC MODULE DTC INDEX table. DTC listed in this table are only for testing covered in this article. For complete DTC listing, see appropriate MODULE COMMUNICATIONS NETWORK article. If no DTCs are retrieved, repair by symptom. See SYMPTOM INDEX table under SYSTEM TESTS.
| DTC | Description | Perform Test | ||
|---|---|---|---|---|
| B1323 | Door Ajar Indicator Circuit Failure | N | ||
| B1325 | Door Ajar Indicator Circuit Short To Voltage | N | ||
| B1342 | GEM Is Defective | (1) | ||
| B1426 | Seat Belt Indicator Circuit Short To Voltage | N/A | ||
| B1428 | Lamp Safety Belt Circuit Failure | M | ||
| B2211 | Low Coolant Lamp Output Circuit Short To Voltage | U | ||
| C1167 | Park Brake Actuator Assembly Switch Released Circuit Short To Ground | J | ||
| C1189 | Brake Fluid Level Sensor Input Short To Ground | J | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.