Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2004 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.

The DTC will clear current status when the voltage is less than 15.5 volts for 1.2 seconds.
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
Use a scan tool.

DTC B1327

Step	Action	Value(s)	Yes	No
Schematic Reference: Power Distribution Schematics in Wiring Systems Connector End View Reference: Power and Grounding Connector End Views in Wiring Systems
1	Did you perform the Engine Electrical Diagnostic System Check?	-	Go to Step 2	Go to Diagnostic System Check - Engine Electrical
2	Install a scan tool. Operate the vehicle within the conditions for running DTC B1327. Does the scan tool indicate that DTC B1327 is current in more than 1 module?	-	Go to Step 3	Go to Step 6
3	Turn ON the ignition, with the engine OFF. With a scan tool, observe the Battery Voltage Signal parameter in the BCM data list. Does the voltage measure greater than the specified value?	9.4 V	Go to Step 11	Go to Step 4
4	Turn OFF the ignition. Disconnect the BCM. Turn ON the ignition, with the engine OFF. Measure the voltage between the battery positive voltage circuit of the BCM and the ground circuit of the BCM. Does the voltage measure greater than the specified value?	9.4 V	Go to Step 5	Go to Battery Electrical Drain/Parasitic Load Test
5	Measure the voltage between the battery positive voltage circuit of the BCM and a good ground. Does the voltage measure greater than the specified value?	9.4 V	Go to Step 9	Go to Step 8
6	Turn OFF the ignition. Disconnect the harness connector of the module setting the DTC B1327. Measure the voltage between the battery positive voltage circuit of the module setting the DTC B1327 and the ground circuit of the module setting the DTC B1327. Does the voltage measure greater than the specified value?	9.4 V	Go to Step 10	Go to Step 7
7	Measure the voltage between the battery positive voltage circuit of the BCM or module setting DTC B1327 and a good ground. Does the voltage measure greater than the specified value?	9.4 V	Go to Step 9	Go to Step 8
8	Test the batter positive voltage circuit of the BCM or module setting DTC B1327 for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 10
9	Test the ground circuit of the BCM or module setting DTC B1327 for a high resistance or an open. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition?	-	Go to Step 12	Go to Step 10
10	Inspect for poor connections at the harness connector of the BCM or module setting DTC B1327. 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 12	Go to Step 11
11	IMPORTANT: Perform the setup procedure for the BCM or module setting DTC B1327, if necessary. Replace the BCM or module setting DTC B1327. Refer to Body Control Module Replacement in Body Control System.Did you complete the replacement?	-	Go to Step 12	-
12	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