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Home >> Pontiac >> 2004 >> Aztek Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 129 (Theft Deterrent System) >> Diagnostic Information and Procedures >> DTC B2945: Security System Sensor Power Circuit >> Test Description
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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 B2945 is a current DTC.
  2. 3:  Tests for a short to ground in the Passlock™ sensor or the pigtail harness.
DTC B2945

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 B2945 as a current DTC?		 Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems
3 
  1. Disconnect the Passlock ™ sensor connector.
  2. Measure the voltage between the Passlock™ battery voltage circuit and the Passlock ground circuit.
Does the voltage measure approximately battery voltage?		 Go to Step 4  Go to Step 6 
4
IMPORTANT: The use of a DMM J 39200 is crucial in this step because voltage may be measured for 10 milliseconds.
  1. Connect a J 39200  between the Passlock ™ battery voltage circuit and a good ground.
  2. Set the "MIN MAX" mode to the 1 millisecond peak and start to record.
  3. Turn OFF the ignition.
  4. Stop recording and review the recorded "MIN" value.
Does the voltage measure near zero volts?		 Go to Step 9  Go to Step 5 
5 Test the Passlock battery voltage 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 13  Go to Step 6 
6 Test the Passlock™ battery voltage circuit for a short to ground or open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 7 
7 Test the Passlock™ ground circuit for a open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 13  Go to Step 8 
8 Inspect for poor connections at the body control module (BCM). 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 13  Go to Step 10 
9 Inspect for poor connections at the Passlock ™ sensor. 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 13  Go to Step 11 
10
IMPORTANT: When replacing the BCM refer to Body Control Module (BCM) Programming/RPO Configuration in Body Control System.
Replace the BCM. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?		 Go to Step 13  -
11 Replace the Passlock™ Sensor. Refer to Ignition Lock Cylinder Case Replacement in Steering Wheel and Column.
Did you complete the replacement?		 Go to Step 12  -
12 Perform the Passlock™ learn procedure. Refer to Programming Theft Deterrent System Components  .
Did you complete the procedure?		 Go to Step 13  -
13
  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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