Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC 031: Exhaust Valve Circuit Short to GroundDTC 032: Exhaust Valve Circuit Short to Battery or Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Exhaust Inflator Valve Control | 031 | 032 | 032 | -- |
Exhaust Inflator Valve B+ | -- | 1 | -- | -- |
1. Exhaust Solenoid Valve Inoperative | ||||
Circuit/System Description
The automatic level control sensor monitors the exhaust valve control circuitry for a short to ground, short to battery, or an open/high resistance circuit.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
031
Short to ground in the control circuit of the exhaust valve
032
Open, or shorted to B+ in the control circuit of the exhaust valve
Action Taken When the DTC Sets
The automatic level control sensor disables leveling functions.
Conditions for Clearing the DTC
The conditions that caused the DTC to set have been removed.
Reference Information
Schematic Reference
Automatic Level Control Schematics
Connector End View Reference
Description and Operation
Automatic Level Control Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Verify that automatic level control functions are disabled.
Circuit/System Testing
- Ignition OFF, disconnect the exhaust valve harness connector at the automatic level control sensor.
- Ignition ON, verify that a test lamp illuminates between the exhaust valve B+ circuit and ground.
- Ignition ON, connect a test lamp between the exhaust valve control circuit and the B+ circuit of the exhaust valve. Command the exhaust valve ON and OFF.
- If all circuits test normal, test or replace the automatic level control sensor.
| ⇒ | If the test lamp does not illuminate, test the B+ circuit for a short to ground or an open/high resistance. If the circuit tests normal, test or replace the automatic level control sensor. |
| ⇒ | If the test lamp does not illuminate, test the control circuit for a short to ground or open. If the circuit tests normal, test or replace the automatic level control sensor. |
| ⇒ | If the test lamp illuminates, test or replace the exhaust valve. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Important: System untested codes will continue to flash until self test has been completed after automatic level control sensor replacement.
| • | Control Module References for automatic level control sensor replacement, setup, and programming |
