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Test Description

WARNING: This page is about a different car, the 2002 Oldsmobile Bravada, 2002 GMC Envoy XL, 2002 GMC Envoy, and 2002 Chevrolet TrailBlazer. 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.

  1. 2:  This step test determines by process of elimination which, if any, dimmable component is causing the DTC to set.
  2. 3:  This step test determines if the problem exists in the wiring or the BCM.
  3. 5:  After replacement of the BCM you must calibrate the new module for proper operation.
DTC B2610

Step Action Yes No
Schematic Reference:  Interior Lights Dimming Schematics  
1 Did you perform the Lighting System Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Lighting Systems 
2 
  1. Clear the DTC B2610 with the scan tool.
  2. Turn the park lamps ON.
  3. Adjust the IP dimmer switch to a mid range dimming position.
  4. Disconnect each dimmable component from the instrument panel lamps dimming control circuit, one at a time, while monitoring the scan tool current codes.
Does DTC B2610 not reset after a particular dimmable component was disconnected?		 Go to Step 4  Go to Step 3 
3  Test the instrument panel lamps dimming control circuit for an open, high resistance, short to voltage or short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS in Wiring Systems.
Did you find and correct the condition?		 Go to Step 6  Go to Step 5 
4 Replace the dimmable component associated with when the code did not reset. Refer to the proper replacement procedure for that particular component.
Did you complete the repair?		 Go to Step 6  -
5 
IMPORTANT: Perform the setup procedure for the BCM.
Replace the body control module (BCM). Refer to BODY CONTROL MODULE REPLACEMENT in Body Control System.Did you complete the replacement?		 Go to Step 6  -
6
  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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