Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Monte Carlo and 2004 Chevrolet Impala. However, it is still accessible from the selected car via links, so may be relevant.

The numbers below refer to the step numbers on the diagnostic table.

2: Tests for an open in the ground circuits of the body control module.
4: Verifies the proper operation of the charging system.
6: Determines whether the DTC resets.

DTC C1254

Step	Action	Yes	No
Schematic Reference: ABS Schematics
1	Did you perform the ABS Diagnostic System Check?	Go to Step 2	Go to Diagnostic System Check - ABS
2	Turn OFF the ignition. Disconnect the EBCM harness connector. Install the J 39700 universal breakout box using the. See Special Tools and Equipment .J 39700-99 breakout box adapter to the EBCM harness connector only. See Special Tools and Equipment . Test the module ground circuit of the EBCM for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 3
3	Has the battery been disconnected recently?	Go to Step 8	Go to Step 4
4	Test the charging system. Refer to Diagnostic System Check - Engine Electrical in Engine Electrical. Did you find and correct the condition?	Go to Step 8	Go to Step 5
5	Inspect for poor connections at the harness connector of the EBCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition?	Go to Step 8	Go to Step 6
6	Use the scan tool in order to clear the DTCs. With the scan tool, perform the Automated Test. Does the DTC reset?	Go to Step 7	Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
7	Replace the EBCM. Refer to Electronic Brake Control Module Replacement . Did you complete the repair?	Go to Step 8	-
8	Use the scan tool in order to clear the DTCs. With the scan tool, perform the Automated Test. Does the DTC reset?	Go to Step 2	System OK