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Test Description

The number below refers to the step number on the diagnostic table.

  1. 3:  This step compares battery voltage with the voltage that the BCM calculates.
DTC B1327

Step Action Value(s) Yes No
Connector End View Reference: Inline Harness Connector End Views in Wiring Systems or Computer/Integrating Systems Connector End Views in Computer/Integrating Systems
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn ON the ignition, with the engine OFF.
  3. With a scan tool, observe the Battery Voltage Signal parameter in the Engine Electrical BCM data list.
Does the scan tool indicate the Battery Voltage Signal parameter is greater than the specified value?		 8.8 V Go to Step 5  Go to Step 3 
3 
  1. Measure the voltage across the battery terminals.
  2. Compare the battery voltage with the Battery Voltage Signal parameter.
Are the voltages within the specified value?		 1 V Go to Battery Inspection/Test  Go to Step 4 
4 Test the battery positive voltage and ground circuits of the body control module (BCM) for a high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 7  Go to Step 5 
5 Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections andConnector Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 7  Go to Step 6 
6
IMPORTANT: Perform the setup procedure for the BCM.
Replace the BCM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming.Did you complete the replacement?		 - Go to Step 7  -
7
  1. Use the scan tool in order to clear the DTC.
  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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