Circuit Description
The solenoid relay, located within the electronic brake control module (EBCM), supplies battery voltage to all of the valve solenoids.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0201 Antilock Brake System (ABS) Enable Relay Contact Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The EBCM detects that the solenoid relay is open for 200 milliseconds, when the relay is supposed to be closed.
Action Taken When the DTC Sets
| • | The EBCM disables the ABS/dynamic rear proportion (DRP). |
| • | The ABS indicator turns ON. |
| • | The ABS fault message turns ON. |
| • | The brake warning indicator turns ON. |
| • | The brakes message is displayed. |
Conditions for Clearing the DTC
The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Inspect for poor connections that may affect the battery positive voltage circuit to terminal 1 of the EBCM, if this DTC continues to set intermittently. Replace the EBCM, if no wiring concerns are found.
Step | Action | Yes | No |
|---|---|---|---|
Schematic Reference: Antilock Brake System Schematics Connector End View Reference: Antilock Brake System Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 | Use a scan tool to clear the DTCs. Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 |
Does the test lamp illuminate? | Go to Step 5 | Go to Step 4 |
4 | Repair the open in the battery positive voltage circuit. Refer to Wiring Repairs . Did you complete the repair? | Go to Step 7 | -- |
5 | Test for poor connections at the harness connector of the EBCM. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 7 | Go to Step 6 |
6 | Replace the EBCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 7 | -- |
7 |
Does the DTC reset? | Go to Step 3 | System OK |
