For 1990-2009 cars

# Service Manual Update for all the 2000 S Series Brakes Service Manuals Regarding DTC B0005

Subject: | Service Manual Update for All the 2000 S-Series Brakes Service Manuals Regarding DTC B0005

Models: | 2000 Saturn S-Series Vehicles

Attention: | Please distribute this bulletin to: Fixed Operations Manager and all Technicians

### Purpose

The purpose of this bulletin is to provide diagnostic information for DTC B0005 - Park Brake Switch Circuit Low that was not provided in the 2000 S-Series Brakes Service Manual.

Obtain all the 2000 S-Series Brakes Service Manuals at your location and update as indicated below.

1. Remove staple from upper corner of this bulletin
2. Insert remaining page of this bulletin between pages 38 and 39 of the service manual.

### Park Brake Switch Circuit Low

### Circuit Description

When the park brake input circuit 1134 to body control module (BCM) is grounded, as when parking brake is applied, the BCM will turn on brake telltale lamp by sending a serial data message to the instrument panel cluster (IPC). If the vehicle is moving greater than 8 km/h (5 mph) and the park brake input to the BCM is grounded, the BCM will sound the warning chime to notify the driver the parking brake is applied. In addition, DTC B0005 will set in current status until ground on circuit 1134 to BCM is removed. Once ground on circuit 1134 is removed, DTC B0005 will transition from current status to history status.

### Conditions for Setting the DTC

• | Ignition switch in RUN position

• | Vehicle speed greater than 8 km/h (5 mph)

• | Circuit 1134 grounded (normal operation)

• | Park brake applied and vehicle speed greater than 8 km/h (5 mph)

### Diagnostic Aids

• | Inspect the wiring harness for damage. Check for broken or chafed insulation.

• | Check for a blockage preventing the parking brake from fully releasing.

• | If the fault is suspected to be intermittent, wiggling the harness wiring may help in locating the fault.