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 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 is turned on |
| • | The ABS is disabled |
DTCs C0271 and C0272 are Permanent Latched DTCs, which indicates that the above actions remain true until the DTC is cleared using a Scan Tool . DTC C0273 Ignition latched, which indicates that the above actions remain true until the ignition switch is turned to OFF (even if the cause of the DTC is intermittent).
DTCs C0271 through C0273 are DRP critical DTCs, which means that DRP is disabled and the BRAKE indicator lamp will also light.
DTCs C0267/C0268 are DRP non critical malfunctions. If another DTC sets before this DTC is investigated and cleared, this will become a DRP Critical malfunction and the BRAKE indicator lamp will also turn on.
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 are EBCM internal diagnosis trouble codes. Replace the EBCM if these tests show that the EBCM circuitry has failed.
Test Description
The numbers below refer to the steps in the diagnostic table:
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | |
Install the Scan Tool and attempt to clear the DTCs. Did the DTCs clear? | -- | Go to Step 3 | Go to Step 4 | |
Check the history DTCs and the data. Was this the first time the DTC has set? | -- | Go to Step 4 | ||
4 | Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Is the repair complete? | -- | -- |
