Test Description

WARNING: This page is about a different car, the 2005 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

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

3: This step tests the inactive signal circuit for an open or a high resistance.

DTC B1372

Step	Action	Yes	No
Schematic Reference: Body Control System Schematics Connector End View Reference: Master Electrical Component List in Wiring 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	Turn ON the ignition, with the engine OFF. With a scan tool, observe the Ignition 1 Input parameter in body control module (BCM) security data display. Does the Ignition 1 Input parameter display High?	Go to Diagnostic Aids	Go to Step 3
3	Turn OFF the ignition. Disconnect the BCM connector C2. Turn ON the ignition, with the engine OFF. Connect a test lamp between the inactive ignition 1 voltage signal circuit and a ground. Does the test lamp illuminate?	Go to Step 4	Go to Step 5
4	Inspect for poor connections and terminal tension at the harness connector of the 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 7	Go to Step 6
5	Repair the inactive ignition 1 voltage signal circuit for an open, high resistance or a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair?	Go to Step 7	-
6	Replace the BCM. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 7	-
7	Use a 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