For 1990-2009 cars

### Circuit Description

The DTC C1271 indicates that a failure has occurred within the EBCM/EBTCM.

### Conditions for Setting the DTC

The DTC C1271 may occur intermittently, due to interference. Therefore, clear the code and test drive the vehicle before replacing the EBCM/EBTCM.

### Action Taken When the DTC Sets

The following actions occur when the DTC sets:

• | DTC C1271 is stored.

• | The ABS/TCS is disabled.

• | The ANTILOCK indicator lamp is turned on.

### Conditions for Clearing the DTC

The DTC will clear under following conditions:

• | Conditions for the malfunction are no longer present. Use the scan tool Clear DTCs function.

• | 100 ignition switch key cycles have passed without detecting any malfunctions

### Diagnostic Aids

Perform a thorough inspection of the wiring and the connectors.

Failure to carefully inspect wiring may result in a misdiagnosis. A misdiagnosis may result in replacing parts without repairing the malfunction.

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the Diagnostic System Check performed? | -- | Go to Step 2 | Go to Diagnostic System Check
2 |

1. Use a scan tool to clear all DTCs.
2. Test drive the vehicle.

Did DTC C1271 reset during the test drive?

--

Go to Step 3

Go to Diagnostic System Check

3 | Replace the EBCM/EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the replacement complete? | -- | Go to Diagnostic System Check | --