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Home >> Cadillac >> 2005 >> DeVille Protection Series >> Repair and Diagnosis >> Brakes >> Antilock Brake System, Traction Control System & Stability Control System >> Diagnostic Information and Procedures >> DTC C1294 >> Test Description

Test Description

The number below refers to the step number on the diagnostic table.

  1. 2:  Test for the current state of the stop lamp switch parameter.
DTC C1294

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 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Stop Lamp Switch parameter in the DRP/ABS/TCS data list.
Does the scan tool display Released?		 Go to Step 3  Go to Step 4 
3
  1. Press the brake pedal.
  2. With a scan tool, observe the Stop Lamp Switch parameter.
Does the Stop Lamp Switch parameter change state?		 Go to Diagnostic Aids Go to Step 4 
4
  1. Turn OFF the ignition.
  2. Inspect the stop lamp switch and adjust and/or calibrate if needed. Refer to Stop Lamp Switch Replacement in Lighting Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 5 
5
  1. Turn OFF the ignition.
  2. Disconnect the stop lamp switch connector.
  3. Turn ON the ignition, with the engine OFF.
  4. With a scan tool, observe the Stop Lamp Switch parameter.
Does the scan tool display Released?		 Go to Step 8  Go to Step 6 
6 Test the stop lamp switch signal circuit for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 11  Go to Step 7 
7 Inspect for poor connections at the harness connector of the electronic brake control module (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 11  Go to Step 9 
8 Inspect for poor connections at the harness connector of the stop lamp switch. 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 11  Go to Step 10 
9 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 11  -
10 Replace the stop lamp switch. Refer to Stop Lamp Switch Replacement in Lighting Systems.
Did you complete the replacement?		 Go to Step 11  -
11
  1. Use the scan tool in order to clear the DTCs.
  2. Operate the vehicle within the Conditions for Running the DTC as specified in the supporting text.
Does the DTC reset?		 Go to Step 2  System OK
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