GM Service Manual Online
For 1990-2009 cars only

Circuit Description

The solenoid valves are part of the Brake Pressure Modulator Valve (BPMV). The BPMV turns ON and OFF the solenoid valves as deemed necessary to modulate hydraulic pressure to the wheel brakes during an ABS stop.

Conditions for Running the DTC

DTC's C0060 - C0090 can be set anytime the ignition switch is in the ON position.

Conditions for Setting the DTC

The Electronic Brake Control Module (EBCM) detects one of the following conditions in the solenoid circuitry:

    • An open
    • A short to ground
    • A short to voltage

Action Taken When the DTC Sets

    • The ABS is disabled.
    • The ABS warning indicator turns ON.

Conditions for Clearing the DTC

The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used.

Diagnostic Aids

Thoroughly inspect the wiring and the connectors. An incomplete inspection of the wiring and the connectors may result in a misdiagnosis, causing a part replacement with the reappearance of the malfunction.

The following are possible causes of the malfunction:

    • An open, high resistance, or a short to ground in the Battery Positive Voltage circuits
    • An open or high resistance in the Solenoid Ground circuit
    • An internal EBCM malfunction

If an intermittent malfunction exists, refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Test Description

The numbers below refer to step numbers on the Diagnostic Table.

  1. This step determines if the DTC is current.

Step

Action

Yes

No

Schematic Reference: Antilock Brake System Schematics

1

Did you perform A Diagnostic System Check - ABS?

Go to Step 2

Go to Diagnostic System Check - ABS

2

Is DTC C0125 also set?

Go to DTC C0125

Go to Step 3

3

  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Use the scan tool in order to clear the DTCs.
  4. Using the scan tool, cycle the appropriate solenoid in the Special Functions menu.
  5. Read the DTCs.

Does the DTC reset?

Go to Step 4

Go to Diagnostic Aids

4

  1. Test the Battery Positive Voltage circuits for an open, high resistance, or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
  2. Test the Solenoid Ground circuit for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.

Did you find and correct the condition?

Go to Step 6

Go to Step 5

5

Replace the Brake Pressure Modulator Valve (BPMV). Refer to Brake Pressure Modulator Valve Assembly Replacement .

Did you complete the replacement?

Go to Step 6

--

6

  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.

Does the DTC reset?

Go to Step 2

System OK