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 C0575 01: Left Front Actuator Circuit Short to BatteryDTC C0575 02: Left Front Actuator Circuit Short to Ground
DTC C0575 04: Left Front Actuator Circuit Open
DTC C0580 01: Right Front Actuator Circuit Short to Battery
DTC C0580 02: Right Front Actuator Circuit Short to Ground
DTC C0580 04: Right Front Actuator Circuit Open
DTC C0585 01: Left Rear Actuator Circuit Short to Battery
DTC C0585 02: Left Rear Actuator Circuit Short to Ground
DTC C0585 04: Left Rear Actuator Circuit Open
DTC C0590 01: Right Rear Actuator Circuit Short to Battery
DTC C0590 02: Right Rear Actuator Circuit Short to Ground
DTC C0590 04: Right Rear Actuator Circuit Open
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Left Front Damper Control Circuit | C0575 02 | C0575 04 | C0575 01 | -- |
Left Front Damper Low Reference Circuit | C0575 02 | C0575 04 | C0575 01 | -- |
Right Front Damper Control Circuit | C0580 02 | C0580 04 | C0580 01 | -- |
Right Front Damper Low Reference Circuit | C0580 02 | C0580 04 | C0580 01 | -- |
Left Rear Damper Control Circuit | C0585 02 | C0585 04 | C0585 01 | -- |
Left Rear Damper Low Reference Circuit | C0585 02 | C0585 04 | C0585 01 | -- |
Right Rear Damper Control Circuit | C0590 02 | C0590 04 | C0590 01 | -- |
Right Rear Damper Low Reference Circuit | C0590 02 | C0590 04 | C0590 01 | -- |
Circuit/System Description
The electronic suspension control module (ESCM) commands variable levels of pulse width modulated current to each damper in response to rough road, or abrupt steering maneuver driving conditions. The ESCM continuously compares each dampers command state with the state of their feedback circuits to ensure they agree.
Conditions for Running the DTC
The ignition is ON for 30 seconds.
Conditions for Setting the DTC
The damper coil, or the circuits to the coil are shorted to ground, shorted to voltage, or open for 3 consecutive ignition ON cycles.
Action Taken When the DTC Sets
| • | A DTC is stored in memory. |
| • | The driver information center (DIC) displays the SERVICE SUSPENSION SYS message. |
| • | If DTC symptom 01 is stored the Electronic Suspension Control (ESC) System is disabled. |
| • | If DTC symptom 02, or 04 is stored the suspect damper is disabled. |
Conditions for Clearing the DTC
| • | A current DTC will clear on the next consecutive malfunction-free ignition cycle. |
| • | A history DTC will clear after 50 consecutive malfunction free ignition cycles. |
| • | Using a scan tool clears the DTC. |
Diagnostic Aids
| • | Before proceeding with the diagnostics, ensure the electrical harness connector at the suspect damper is fully engaged by pushing the harness connector toward the damper. If an audible click is heard, or substantial engagement travel is noted, ensure the remaining damper connectors are fully engaged as well. |
| • | When the scan tool is used to clear the DTC, the ESCM’s ignition cycle counter is disabled for the remainder of the ignition cycle. This allows the DTC to set upon initial malfunction detection. Once the ignition is cycled the counter resets to 3. |
| • | The scan tool can be used to command the suspect damper On and Off while actuating the suspension and noticing an increase and decrease in damping control. |
Reference Information
Schematic Reference
Electronic Suspension Control Schematics
Connector End View Reference
Electronic Suspension Control Connector End Views
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
With scan tool installed drive the vehicle and monitor the damper actuators respond to rough road, or abrupt steering maneuver driving conditions.
Circuit/System Testing
Note: It is Recommend that Component Testing is performed before Circuit Testing when diagnosing damper actuators.
- With the ignition OFF, disconnect the ESCM connector.
- With the ignition ON, measure for 0 volts between the damper control circuit or the low reference circuit and ground at the ESCM connector.
- With the ignition OFF, Measure for infinite ohms of resistance between the damper control circuit or the low reference circuit and ground at the ESCM connector.
- Measure for 0.5-2.0 ohms of resistance between the damper control circuit and low reference circuit at the ESCM connector with the damper actuator connected.
- If all circuits test normal replace the ESCM.
| ⇒ | If over 0 volts, repair short to voltage in damper control circuit or the low reference circuit. |
| ⇒ | If less than infinite ohms, repair short to ground in the damper control circuit or the low reference circuit. |
| ⇒ | If greater than 0.5-2.0 ohms check for an open/high resistance in the circuit or faulty damper actuator. |
| ⇒ | If less than 0.5-2.0 ohms check for a short between the circuits or faulty damper actuator. |
Component Testing
Disconnect the suspect damper actuator harness connector, with the ignition OFF, measure for 0.5-2.0 ohms from the male terminal in the center of the damper rod to the damper rod.
| ⇒ | If value is not in range replace damper. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for ESCM replacement, setup, and programming |
