Circuit Description
The pump motor is an integral part of the Brake Pressure Modulator Valve (BPMV). The EBCM relay supplies power to the solenoid valves and pump motor. The EBCM relay activates when the ignition is turned to the ON position. The EBCM relay remains engaged until the ignition is turned to the OFF position or until the system detects a malfunction.
Conditions for Running the DTC
| • | The pump motor has been commanded OFF for 1 second. |
| • | The switched system battery voltage is greater than 9 volts. |
Conditions for Setting the DTC
One of the following conditions occur:
| • | Voltage across the pump motor is greater than 10.16 volts for 0.2 seconds. |
| • | The pump motor low side voltage is less than 2.7 volts for 0.2 seconds. |
Action Taken When the DTC Sets
The following actions occur:
| • | The EBCM disables the ABS for the duration of the ignition cycle. |
| • | The ABS warning indicator turns ON. |
| • | A malfunction DTC is stored. |
Conditions for Clearing the DTC
| • | The condition for setting the DTC is no longer present and the scan tool Clear DTCs function is used. |
| • | The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles. |
Diagnostic Aids
| • | Possible causes for DTC C1217 to set are: |
| - | The Pump motor is shorted to ground. |
| - | An internal EBCM malfunction exists. |
| • | The pump motor is an integral part of the BPMV and is not serviced separately. |
| • | The EBCM relay is an integral part of the EBCM and is not serviced separately. |
| • | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect the wiring and connectors may result in a misdiagnosis, causing part replacement with a reappearance of the malfunction. |
| • | If an intermittent malfunction exists, refer to Testing for Intermittent and Poor Connections in Wiring Systems. |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the ABS Diagnostic System Check? | -- | Go to Step 2 | Go to ABS Diagnostic System Check |
2 |
Did you find and correct the condition? | -- | Go to Step 6 | Go to Step 3 |
Does the resistance measure less than the specified value? | OL (Infinite) | Go to Step 4 | Go to Step 5 | |
4 | Replace the BPMV. Refer to Brake Pressure Modulator Valve Replacement. Did you complete the repair? | -- | Go to Step 6 | -- |
5 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement. Did you complete the repair? | -- | Go to Step 6 | -- |
6 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
