Grand Prix V6-3.1L VIN J (2000)
Body Control Module: Reading and Clearing Diagnostic Trouble Codes
Clearing Diagnostic Trouble Codes
In order to erase the DTCs stored in the BCM, press and hold the UNLOCK button on either power door lock switch for 4 seconds.
Entering Feature Customization Mode
When you perform BCM diagnostics, enter the feature customization mode. During this mode, the BCM identities itself. This ensures that the option
content of the vehicle matches the capabilities of the BCM. Complete the following steps in order to enter the feature customization mode:
1. Turn the ignition switch to the OFF position.
2. Remove the MALL PGM fuse.
3. Turn the ignition switch to the ACC position.
Upon entering the feature customization mode, the BCM flashes the fasten belts indicator and sounds the chime 2, 3 or 4 times. The number of chimes is
equal to the BCM type used on the vehicle. Ensure that the BCM installed on the vehicle is compatible with all the features on the vehicle. If an incorrect
BCM is installed, replace the BCM with the correct type. At this point, the following vehicle systems have features that can be customized:
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The interior lighting
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The automatic door lock
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The keyless entry
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The content theft deterrent
Entering the Diagnostics Mode
Complete the following steps in order to enter the diagnostics mode:
1. Ensure that the BCM is in the feature customization mode.
2. Turn the ignition switch from the ACC position to the OFF position, then back to the ACC position within 1 second.
Perform the following procedure in order to confirm the BCM has entered the diagnostics mode:
1. Ensure that all of the vehicle doors are closed.
2. Open and close any one of the doors.
3. Fasten and release the driver seat belt.
The BCM sounds the chime when it receives an input signal such as opening a door or fastening the drivers seat belt when the BCM is in the diagnostics
mode.
The following actions occur when the diagnostics mode is entered:
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The BCM flashes the fasten belts indicator.
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The BCM sounds the chime a number of times equal to the DTCs that are stored in the memory.
If no DTCs are stored the BCM does not flash the fasten belts indicator nor sounds the chime.
The BCM flashes and sounds the first DTC with the lowest number. The BCM pauses and continues with the next DTC until all the DTCs are read. Once
all the DTCs are read, the BCM repeats this sequence 3 times.
If there are DTCs in the memory, record the DTCs.
Entering the Input/Output Test
After the BCM reads all of the DTCs in the memory, the BCM enters the Input /Output test.
The BCM flashes the fasten belts indicator and sounds the chime once when operating one of the following inputs:
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All the reading courtesy lamp switches
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The door lock cylinders
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The drivers door lock ajar switch
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The drivers fasten seat belt switch
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The Driver Information Display (DID)
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The headlamps OFF switch
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The IP compartment lamp switch
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The keyless entry requests for door lock/unlock
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The passenger door lock ajar switch
^
The power door lock switches
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The rear compartment courtesy lamp switch
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The shock sensor
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The sunshade illuminated mirrors
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The trip calculator
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The turn signal switch
If the BCM does not provide a chime feedback, one of the following conditions exists:
