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 Descriptors
DTC C0716 00: Left Rear Actuator 2 CircuitDTC C0717 00: Right Rear Actuator 2 Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Left Rear Actuator B+ | C0716 00, C0717 00 | C0716 00, C0717 00 | C0716 00, C0717 00 | -- |
Right Rear Actuator B+ | C0717 00 | C0717 00, C0716 00 | C0716 00, C0717 00 | -- |
Left Rear Actuator Control | C0716 00 | C0716 00 | C0716 00 | -- |
Right Rear Actuator Control | C0717 00 | C0717 00 | C0717 00 | -- |
Circuit Description
The air suspension adjusts the vehicle suspension ride height. The air suspension control module (ASCM) controls the left rear and right rear air pressure control valves based on input from the position sensors to keep the vehicle level from front to back and side to side.
Conditions for Running the DTC
| • | Battery voltage is between 9-16 volts. |
| • | The valve solenoid is commanded ON. |
Conditions for Setting the DTC
| • | The pressure control valve solenoid control circuit is shorted to voltage, ground, or open when solenoid activation is attempted 4 times. |
| • | The pressure control valve solenoid B+ circuit is shorted to voltage, ground, or open when solenoid activation is attempted 4 times. |
Action Taken When the DTC Sets
| • | The air suspension system will be inoperative. |
| • | The SERVICE SUSPENSION SYSTEM message will be displayed. |
Conditions for Clearing the MIL/DTC
| • | When the fault is no longer present, DTC C0716 and C0717 will change from a current DTC to a history DTC on the next ignition cycle. |
| • | DTC C0716 and C0717 will be cleared from history after 50 ignition cycles. |
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Air Suspension Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, command the air suspension LR/RR Control Valve Command ON and OFF with a scan tool. Verify the control valve solenoids turn ON and OFF with each command.
Circuit/System Testing
- Ignition OFF, disconnect the appropriate air suspension control valve solenoid.
- Ignition ON, verify that a test lamp does not illuminate between the solenoid control circuit terminal at the connector and ground.
- Verify that a test lamp illuminates between the B+ circuit terminal and ground.
- Connect a test lamp between the B+ circuit terminal and the control circuit terminal.
- Command the appropriate control valve ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states.
- If all circuits test normal, replace the air suspension compressor assembly.
| ⇒ | If the test lamp illuminates, test the control circuit for a short to voltage. |
| ⇒ | 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 air suspension compressor assembly. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to ground. If the circuit tests normal, replace the air suspension control module. |
| ⇒ | If the test lamp is always OFF, test the control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the air suspension control module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for air suspension control module replacement, setup and programming |
