GM Service Manual Online
For 1990-2009 cars only

Object Number: 594304  Size: MF
Shift Interlock Actuator
Body Rear End Components
CRUISE, DIS, and PCM (IGN) Fuses
CRUISE, DIS, and PCM (IGN) Fuses
Handling ESD Sensitive Parts Notice
Body Control System Connector End Views

Circuit Description

When the body control module (PZM) receives a serial data message from the powertrain control module (PCM) that the transaxle is in PARK, the PZM grounds the PARK relay control circuit. The PZM monitors this output and determines the actual voltage.

Conditions for Setting the DTC

The PZM determines that the PARK relay control circuit is shorted to ground.

Action Taken When the DTC Sets

The PZM will continue commanding the requested state until the state is achieved or until the request changes.

Conditions for Clearing the DTC

The PZM determines that the PARK relay control circuit is no longer shorted to ground.

Step

Action

Value(s)

Yes

No

1

Did you perform A Diagnostic System Check- Automatic Transmission Shift Lock Control?

--

Go to Step 2

Go to Diagnostic System Check - Automatic Transmission Shift Lock Control

2

  1. Disconnect the Body Control Module (PZM).
  2. Disconnect the PARK relay.
  3. Test the PARK relay control circuit for a short to battery positive voltage (B+). Refer to Circuit Testing and Wiring Repairs in Wiring Repairs.

Did you find and correct the condition?

--

Go to Step 5

Go to Step 3

3

Inspect for poor connections at the body control module. 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 5

Go to Step 4

4

Replace the body control module (PZM). Refer to Body Control Module Replacement in Body Control System.

Did you complete the repair?

--

Go to Step 5

--

5

  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 2

System OK