Test Description

WARNING: This page is about a different car, the 2004 Chevrolet Corvette. 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: This tests if a door switch for an internal short to voltage or ground.
3: This tests a door switch illumination circuits for a short to voltage or ground.

DTC B2278-B2279

Step	Action	Value(s)	Yes	No
Schematic Reference: Door Control Module Schematics Connector End View Reference: Power Door Systems Connector End Views
1	Did you perform the Power Door Systems Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Door Systems
2	Turn OFF the ignition. Disconnect the door switch connector of which the DTC was set for. Turn ON the ignition, with the engine OFF. Turn ON the headlamp switch. With a scan tool, clear all RH and LH DCM DTCs. Does the DTC reset?	-	Go to Step 3	Go to Step 5
3	Test the following appropriate door switch illumination control circuits, if they apply, for a short to ground or voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Door switch illumination lamps Memory 1 select indicator Memory 2 select indicator LH mirror select indicator RH mirror select indicator Did you find and correct the condition?	-	Go to Step 6	Go to Step 4
4	Replace the appropriate door module. Refer to Door Control Module Replacement . Did you complete the replacement?	-	Go to Step 6	-
5	Replace the appropriate door switch. Refer to Front Door Switch Replacement . Did you complete the replacement?	-	Go to Step 6	-
6	Use the scan tool in order to clear the DTCs. 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