GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2006 🢒 Rendezvous - FWD 🢒 Accessories 🢒 Navigation Systems 🢒 DTC B0008

Circuit Description

The body control module (BCM) monitors the park/neutral position (PNP) switch position. The BCM uses the position of the switch to determine when to perform certain body control functions.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B0008 In Park Switch Circuit High

Conditions for Setting the DTC

The BCM detects a short to battery in the PNP circuit while IGN 1 is not active.

Action Taken When the DTC Sets

The BCM stores DTC B0008 in memory.

Conditions for Clearing the DTC
    • A current DTC clears when the malfunction is no longer present.
    • A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

Step

Action

Yes

No

Schematic Reference: Body Control System Schematics

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. Place shift lever in the PARK position.
  3. Turn the ignition switch to OFF.
  4. With a scan tool, monitor the following in body control module (BCM), Data Display, Inputs:
    5. • Ignition 1
    • Park/Neutral Switch

Does the scan tool indicate that both inputs are inactive?

Go to Step 3

Go to Step 4

3
  1. Turn the ignition switch ON, with the engine OFF.
  2. With a scan tool, monitor the following in Body Control Module, Data Display, Inputs:
    3. • Ignition 1
    • Park/Neutral Switch

Does the scan tool indicate that both inputs are active?

Go to Step 6

Go to Step 8

4

Probe the park/neutral position (PNP) switch circuit of the BCM with a test lamp that is connected to a good ground.

Does the test lamp illuminate?

Go to Step 5

Go to Step 6

5

Repair the short to voltage in the PNP switch circuit.

Did you complete the repair?

Go to Step 8

--

6

Inspect for poor connections at the BCM harness connectors. 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 8

Go to Step 7

7

Replace the BCM. Refer to Control Module References for replacement, setup, and programming.

Did you complete the replacement?

Go to Step 8

--

8
  1. Use the scan tool in order to clear 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 2

System OK