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 Circuit
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 Circuit
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 Circuit
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 Circuit
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
Left Front Suspension Damper Control Terminal A | C0575 02 | C0575 04 | C0575 01 | -- |
Left Front Suspension Damper Control Terminal B | -- | C0575 04 | -- | -- |
Right Front Suspension Damper Control Terminal A | C0580 02 | C0580 04 | C0580 01 | -- |
Right Front Suspension Damper Control Terminal B | -- | C0580 04 | -- | -- |
Left Rear Suspension Damper Control Terminal A | C0585 02 | C0585 04 | C0585 01 | -- |
Left Rear Suspension Damper Control Terminal B | -- | C0585 04 | -- | -- |
Right Rear Suspension Damper Control Terminal A | C0590 02 | C0590 04 | C0590 01 | -- |
Right Rear Suspension Damper Control Terminal B | -- | C0590 04 | -- | -- |
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 ESC module continuously compares each dampers command state with the state of their feedback circuits to ensure they agree.
Conditions for Running the DTC
| • | Battery voltage is between 9-16 volts. |
| • | Ignition 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. |
| • | The vehicle must be driven over 4.8 km/h (3 mph). |
Action Taken When the DTC Sets
| • | The driver information center (DIC) displays the SERVICE SUSPENSION SYSTEM message. |
| • | If the DTC symptom 01 is stored, the ESC system is disabled. |
| • | If the 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. |
Reference Information
Schematic Reference
Electronic Suspension Control Schematics
Connector End View Reference
Description and Operation
Electronic Suspension Control Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, with the scan tool command the damper actuators ON and OFF while jouncing the vehicle in the front and rear. The suspension should change stiffness when commanded between the ON and OFF state.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
- Perform this setup step in the following order:
- Command the damper 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, test or replace the suspension damper.
Important: Whenever repairing and/or replacing ALC system components, perform the Suspension Position Calibration procedure.
| 2.1. | Connect a test lamp between the damper connector control circuit terminal A and control circuit terminal B. |
| 2.2. | Ignition ON, with a scan tool, clear all ESC module DTCs. |
| ⇒ | If the test lamp is always ON, test the control circuit terminal A for a short to voltage. If the circuit tests normal, replace the ESC module. |
| ⇒ | If the test lamp is always OFF, test the control circuits listed below. If all circuits test normal, replace the ESC module. |
| • | Control circuit terminal A for a short to ground or open/high resistance. |
| • | Control circuit terminal B for an open/high resistance or short to voltage. |
Component Testing
- Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
- Test for 1.5-3.3 Ω between the control terminal A and the low control terminal B of the suspension damper.
| ⇒ | If not within the specified range, replace the suspension damper. |
Repair Instructions
| • | Control Module References for ESCM replacement, setup, and programming |
Repair Verification
- Install any components or connectors that have been removed or replaced during diagnosis.
- Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.
- Clear the DTCs.
- Use the scan tool Diagnostic Counter Reset output control function to bypass the 3 consecutive ignition cycle requirement for setting a DTC. This will ensure that if a DTC was to be reset during the repair verification process, it will be displayed on the scan tool.
- Turn OFF the ignition for 60 seconds.
- Turn ON the ignition.
- If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if appropriate, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to the Diagnostic Trouble Code (DTC) List - Vehicle and perform the appropriate diagnostic procedure
