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

Voltage is supplied to the electronic suspension control (ESC) module in the battery positive voltage circuit and the ignition voltage circuit. The ESC module monitors the supplied voltage to determine if it is within a valid operating range.

The ignition is ON

Battery voltage is outside the normal range of 9-15.5 volts

All ESC functions are disabled

Schematic Reference

Suspension Controls Schematics

Connector End View Reference

Suspension Controls Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. Ignition OFF, disconnect the harness connector at the ESC module.
2. Test for less than 5 ohms of resistance between the ground circuit terminal 2 and ground.

⇒	If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, test for 9-15.5 volts between the B+ circuit temrinal 1 and ground.

⇒	If less than the specified range, test the B+ circuit for a short to ground or an open/high resistance.

⇒	If greater than the specified range, refer to Charging System Test.

4. Test for 9-15.5 volts between the ignition circuit temrinal 19 and ground.

⇒	If less than the specified range, test the ignition circuit for a short to ground or an open/high resistance.

⇒	If greater than the specified range, refer to Charging System Test.

5. If all circuit test normal, replace the ESC module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for ESC module replacement, setup, and programming