Suspension Control Switch Malfunction (All Except ZR1)

Suspension Control Switch Malfunction (All Except ZR1)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

Diagnostic Fault Information






Circuit/System Description

When the driver selects the SPORT position on the suspension control switch, a ground signal is sent to the body control module (BCM). The BCM then sends a serial data signal to the ESC module requesting a firmer damper ride control rate for each damper allowing the driver to customize the ride and handling of the vehicle.

Reference Information

Schematic Reference

Electronic Suspension Control Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views 5 Bow Lowered Switch (CM7)

Description and Operation

Electronic Suspension Control Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

Ignition ON, with the scan tool, observe the Ride Handling Sw. data parameter in the BCM Chassis data list while toggling the suspension control switch between the SPORT and TOURING positions. The parameter should change state.

Circuit/System Testing

1. Ignition OFF, disconnect the suspension control switch.

2. Test for less than 30 ohms between the switch harness connector ground terminal 12 and ground.

• If greater than the specified range, test for an open/high resistance.

3. Ignition ON, momentarily connect a 5 A fused jumper between the switch harness connector signal circuit terminal 10 and ground while observing the Ride Handling Sw. data parameter in the BCM Chassis data list.

• If the parameter does not change between states, test the signal circuit for a short to voltage, short to ground, or an open/high resistance. If the circuit tests normal, replace the BCM.

4. Test or replace the suspension control switch.

Component Testing

Suspension Control Switch

1. Place the suspension control switch in the TOUR position.

2. Test for less than 2 ohms between terminal 10 and terminal 12.

• If greater than the specified range, replace the suspension control switch.

3. Place the suspension control switch in the SPORT position.

4. Test for infinite resistance between terminal 10 and terminal 12.

• If less than the specified value, replace the suspension control switch.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.

* Electronic Suspension Switch Replacement Service and Repair

* Control Module References Control Module References for BCM replacement, setup, and programming