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Test Description

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

  1. 2:  Verifies that DTC B2947 is a current DTC.
  2. 3:  Tests for a short to ground in the Passlock(tm) sensor or the pigtail harness.
DTC B2947

Step Action Yes No
1 Did you perform the Theft Deterrent Diagnostic System Check? Go to Step 2  Go to Diagnostic System Check - Theft Deterrent 
2 
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. Select the body control module display DTCs function on the scan tool.
Does the scan tool display DTC B2947 as a current DTC?		 Go to Step 3  Go to TESTING FOR INTERMITTENT AND POOR CONNECTIONS
3 
  1. Disconnect the Passlock(tm) sensor connector.
  2. Measure the voltage between the Passlock(tm) battery voltage circuit and a good ground.
Does the voltage measure approximately battery voltage?		 Go to Step 6  Go to Step 4 
4 Test the Passlock(tm) battery voltage circuit for a short to ground. Refer to CIRCUIT TESTING and WIRING REPAIRS .
Did you find and correct the condition?		 Go to Step 10  Go to Step 5 
5 Inspect for poor connections at the body control module (BCM). Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Did you find and correct the condition?		 Go to Step 10  Go to Step 7 
6 Inspect for poor connections at the Passlock(tm) sensor. Refer to TESTING FOR INTERMITTENT AND POOR CONNECTIONS and CONNECTOR REPAIRS .
Did you find and correct the condition?		 Go to Step 10  Go to Step 8 
7
IMPORTANT: When replacing the BCM refer to BODY CONTROL MODULE (BCM) PROGRAMMING/RPO CONFIGURATION .
Replace the BCM. Refer to BODY CONTROL MODULE REPLACEMENT .Did you complete the replacement?		 Go to Step 10  -
8 Replace the Passlock(tm) Sensor. Refer to ELECTRONIC COLUMN LOCK MODULE - DISASSEMBLE - OFF VEHICLE and ELECTRONIC COLUMN LOCK MODULE - ASSEMBLE - OFF VEHICLE .
Did you complete the replacement?		 Go to Step 9  -
9 Perform the Passlock(tm) learn procedure. Refer to Programming Theft Deterrent System Components  .
Did you complete the procedure?		 Go to Step 10  -
10
  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 3  System OK
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