C0580
DTC C0575, C0580, C0585, or C0590
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.
DTC Descriptors
DTC C0575 02
- Left Front Damper Actuator Circuit Short to Ground
DTC C0575 04
- Left Front Damper Actuator Circuit Open
DTC C0575 0F
- Left Front Damper Actuator Circuit Signal Erratic
DTC C0580 02
- Right Front Damper Actuator Circuit Short to Ground
DTC C0580 04
- Right Front Damper Actuator Circuit Open
DTC C0580 0F
- Right Front Damper Actuator Circuit Signal Erratic
DTC C0585 02
- Left Rear Damper Actuator Circuit Short to Ground
DTC C0585 04
- Left Rear Damper Actuator Circuit Open
DTC C0585 0F
- Left Rear Damper Actuator Circuit Signal Erratic
DTC C0590 02
- Right Rear Damper Actuator Circuit Short to Ground
DTC C0590 04
- Right Rear Damper Actuator Circuit Open
DTC C0590 0F
- Right Rear Damper Actuator Circuit Signal Erratic
Diagnostic Fault Information
Circuit/System Description
The suspension control module commands variable levels of current to each shock absorber actuator in response to rough road, braking or abrupt steering maneuver driving conditions. The current variation is performed by pulse width modulation (PWM) of the system voltage. The suspension control module continuously measures the actual current of each actuator. When a deviation between commanded and actual current is detected, a DTC is set.
Conditions for Running the DTC
System voltage is between 9-16 V.
Conditions for Setting the DTC
C0575 02, C0580 02, C0585 02, and C0590 02
* A short to voltage or short to ground on the control high circuit is detected.
* A short to ground on the control low circuit is detected.
C0575 04, C0580 04, C0585 04, and C0590 04
* An open circuit on the control high or control low circuit is detected.
* A short to voltage on the control low circuit is detected.
C0575 0F, C0580 0F, C0585 0F, and C0590 0F
An erratic current on the actuator circuit is detected.
Action Taken When the DTC Sets
* The electronic suspension control is disabled for the duration of the ignition cycle.
* The driver information center displays the SERVICE SUSPENSION SYSTEM message.
Conditions for Clearing the DTC
* A present DTC will clear on the next consecutive malfunction-free ignition cycle.
* A history DTC will clear after 41 consecutive malfunction-free ignition cycles.
Reference Information
Schematic Reference
Electronic Suspension Control Schematics (Electrical Diagrams)
Connector End View Reference
Component Connector End Views (Connector End Views By Name)
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 (Programming and Relearning) for scan tool information
Circuit/System Verification
Ignition ON, with a scan tool, command the Damper Actuator Increase and Decrease while observing the Damper Actuator Command parameter. The parameter should vary between 0-1000 mA. Listen/feel the Q37 shock absorber actuator. The component should activate when changing between the commanded states.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.
2. Perform this setup step in the following order:
1. Connect a test lamp and ammeter in series between both Q37 shock absorber actuator harness connector control circuit terminals.
2. Ignition ON, with a scan tool, attempt to clear all K19 suspension control module DTC's (codes may not clear).
3. With a scan tool, command the Damper Actuator to Increase the amperage to approximately 400 mA and Decrease to 0 mA while comparing the ammeter displayed values and scan tool Damper Actuator Command parameter displayed values. Verify the following:
* The test lamp is illuminated.
* The ammeter displayed values and scan tool Damper Actuator Command parameter displayed values change and are simultaneously within 15 mA of each other.
• If the test lamp is not illuminated and/or the values are not within the specified range, test both control circuits for a short to voltage, short to ground, or open/high resistance. If all circuits test normal, replace the K19 suspension control module.
4. If all circuits test normal, test or replace the Q37 shock absorber actuator.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.
2. Test for 2-3 ohm between the Q37 shock absorber actuator control terminals.
• If not within the specified range, replace the Q37 shock absorber actuator.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Strut, Strut Component, or Spring Replacement (Front Suspension Coil Spring)
* Shock Absorber Replacement (Rear Suspension Shock Absorber)
* Control Module References (Programming and Relearning) for suspension control module replacement, setup, and programming