Test Description

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

2: This step tests for an open in the ground circuits of the EBCM.
4: This step verifies the proper operation of the charging system.
6: This step determines whether the DTC resets.

DTC C1254

Step	Action	Yes	No
Schematic Reference: ABS Schematics Connector End View Reference: ABS Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Turn OFF the ignition. Disconnect the electronic brake control module (EBCM) harness connector. Install the J 39700 Universal Pinout Box using the J 39700-300 Cable Adapter to the EBCM harness connector only. See Special Tools . Test both ground circuits of the EBCM including the EBCM ground 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 - Vehicle in Vehicle DTC Information. 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 Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	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