DTC 4 - Grounded Anti-Lock Pressure Valve Reset Switch: 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.
- Clear DTCs. See CLEARING CODES . Turn ignition off. Disconnect EBCM 4-pin connector. Turn ignition on. Measure voltage between Blue wire and Black wire terminals of EBCM 4-pin connector. If voltage is 4-15 volts, go to next step. If voltage is not 4-15 volts, go to step 3).
- Turn ignition off. Replace Anti-Lock Pressure Valve (APV). See ANTI-LOCK PRESSURE VALVE . After replacing APV, clear DTCs. See CLEARING CODES . Perform SYSTEM DIAGNOSTIC CHECK.
- Replace EBCM. See ELECTRONIC BRAKE CONTROL MODULE (EBCM) . After EBCM replacement, perform SYSTEM DIAGNOSTIC CHECK .