DTC 2 - Open Isolation Solenoid Or EBCM Fault: Notes
WARNING: This page is about a different car, the 1995 GMC Sonoma. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Perform SYSTEM DIAGNOSTIC CHECK
before performing trouble shooting procedure.
- Turn ignition off. Disconnect EBCM 4-pin connector. Measure resistance between Green wire and Black wire terminals of EBCM 4-pin connector. If resistance is 3-6 ohms, go to step 5). If resistance is not 3-6 ohms, go to next step.
- Check for poor connection at EBCM 4-pin connector. If connection is okay, go to next step. If connection is not okay, go to step 4).
- Replace Anti-Lock Pressure Valve (APV). See removal procedures for ANTI-LOCK PRESSURE VALVE . After replacement of APV, perform SYSTEM DIAGNOSTIC CHECK .
- Repair EBCM 4-pin connector as necessary. Measure resistance between Green wire and Black wire terminals of EBCM 4-pin connector. If resistance is 3-6 ohms, perform SYSTEM DIAGNOSTIC CHECK . If resistance is not 3-6 ohms, go to step 3).
- Connect the EBCM 4-pin connector. Clear the DTCs. See CLEARING CODES . Turn ignition on. If BRAKE light comes on and stays on, go to next step. If BRAKE light does not come on, go to step 2).
- Turn ignition off. Check for stored trouble codes. See RETRIEVING CODES . If DTC 7 is present, go to DTC 7. If DTC 7 is not present and DTC 2 is still present, go to next step. If no DTCs are present, go to step 8).
- Turn ignition off. Replace EBCM. See removal procedures for ELECTRONIC BRAKE CONTROL MODULE (EBCM) . After EBCM replacement, perform SYSTEM DIAGNOSTIC CHECK .
- The cause for DTC 2 was a poor connection at EBCM 4-pin connector. Ensure EBCM 4-pin connector is fully seated. Perform SYSTEM DIAGNOSTIC CHECK .