C0273

Circuit Description
The EBCM initializes a self-test when the ignition is turned to the RUN position. This internal self-test verifies that all ABS circuitry is operating correctly.

Conditions for Running the DTC
- Ignition switch in the RUN position.
- The ABS bulb check is completed

Conditions for Setting the DTC
Any condition within the EBCM which causes a memory error will set this DTC.

Action Taken When the DTC Sets
- The ABS indicator lamp turns on
- The ABS disables

Malfunction responses to DTC C0271-C0273 and C0284 vary' depending on the affected subsystem.
- ABS-C0271, C0272 Permanent latched. C0273, C0284-Ignition latched
- DRP-DRP critical

For a detailed explanation of DTC malfunction responses, refer to Self-Diagnostics

Conditions for Clearing the DTC
- Repair the conditions responsible for setting the DTC
- Use the Scan Tool Clear DTCs function

Diagnostic Aids
DTCs C0271 through C0273, and C0284 are EBCM internal diagnosis trouble codes. Replace the EBCM if these tests show that the EBCM circuitry has failed. Refer to Electronic Brake Control Module (EBCM) Replacement.

Test Description
The numbers below refer to the steps in the diagnostic table:
2. This step checks if the EBCM will Clear DTCs.
3. This step checks if the DTC was set previously.