Circuit Description
The pump motor is an integral part of the Brake Pressure Modulator Valve (BPMV). The electronic brake control relay supplies voltage to the solenoid valves and pump motor. This voltage is referred to as the system voltage. The electronic brake control relay, located in the EBCM, is activated whenever the ignition switch is in the RUN position and no faults are present. The electronic brake control relay remains engaged until the ignition switch is turned off or a failure is detected.
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The pump motor has been commanded OFF for 1 second. |
| • | The system voltage is greater than 9.36 volts. |
Conditions for Setting the DTC
Either of the following conditions are present for greater than 0.20 seconds.
| • | The voltage across the pump motor is greater than 10.16 volts |
| • | The pump motor low side voltage is no more than 2.70 volts. |
Action Taken When the DTC Sets
| • | ABS/TCS is disabled. |
| • | ABS/TCS indicators are turned on. |
Conditions for Clearing the DTC
| • | Condition for DTC is no longer present and scan tool clear DTC function is used. |
| • | 100 ignition cycles have passed with no DTCs detected. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | ||
2 |
Is connector OK and cavity free of brake fluid? | -- | ||
3 |
Did you complete the repair? | -- | -- | |
4 | With the EBCM removed, measure for continuity between the pump motor terminals and the pump motor case using the J 35616 Connector Test Kit. Is continuity present between either of the pump motor terminals and the pump motor case? | -- | ||
5 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair? | -- | -- | |
6 | Replace the BPMV. Refer to Brake Pressure Modulator Valve Replacement . Did you complete the repair? | -- | -- | |
7 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
