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 | C0585 04 | C0580 01 | -- |
Right Front Damper Low Reference Circuit | C0580 02 | C0585 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 Control Circuit | C0590 02 | C0590 04 | C0590 01 | -- |
Circuit/System Description
The electronic suspension control module (ESCM) commands the damper solenoid ON and OFF. When the solenoid is initially energized, the supply voltage is then pulse width modulated (PWM). The amount the solenoid is activated is based on inputs from the driver tow/haul switch, road inputs, position sensor inputs, and the powertrain control module (PCM). 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 in the RUN position for 30 seconds.
Conditions for Setting the DTC
C0575-C0590 01
| • | Upon detection of the damper solenoid or the circuits to the solenoid are shorted to voltage when at 0-91 percent PWM. |
| • | Allow 30 seconds for redetection after clearing codes. |
C0575-C0590 02
| • | Upon detection of the damper solenoid or the circuits to the solenoid are shorted to ground when at 5-100 percent PWM for 3 consecutive ignition RUN cycles. |
| • | Cycle the dampers for 30 seconds after clearing codes. |
C0575-C0590 04
| • | The damper solenoid or the circuits to the solenoid are open when at 0-91 percent PWM for 3 consecutive ignition RUN cycles. |
| • | Command the damper to the OFF state for 30 seconds after clearing codes. |
Action Taken When the DTC Sets
C0575-C0590 01
| • | The DTC is stored in memory. |
| • | The driver information center (DIC) displays the SERVICE SUSPENSION SYSTEM and SPEED LIMITED message. |
| • | All dampers are disabled. |
C0575-C0590 02 and 04
| • | The suspect damper is disabled. |
| • | The DIC displays the SERVICE SUSPENSION SYSTEM. |
| • | If any combination of 2 damper acutators short to ground or open circuit failures are simultaneously present, SPEED LIMITED will also be displayed in the DIC. |
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.
Reference Information
Schematic Reference
Electronic Suspension Control Schematics
Connector End View Reference
Electronic Suspension Control Connector End Views
Description and Operation
Electronic Suspension Control Description and Operation
Electrical Information Reference
Scan Tool Reference
Circuit/System Verification
Engine running, command the suspect damper solenoid On and Off with a scan tool while jouncing the suspension, verify an increase, and decrease in damping.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the applicable suspension damper.
- Test for less than 1.0 ohm between the low reference circuit terminal and ground.
- Ignition OFF, perform this setup step in the following order:
- Engine running, command the applicable 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 applicable suspension damper.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. |
| 3.1. | Connect a test lamp between the control circuit terminal A and the low reference circuit terminal B. |
| 3.2. | Ignition ON, with a scan tool, clear all ESC module DTCs. |
| ⇒ | If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the ESC module. |
| ⇒ | If the test lamp is always OFF, test for a short to ground or an open/high resistance on the control circuit. If the circuit tests normal, replace the ESC module. |
Component Testing
- Ignition OFF, disconnect the harness connector at the suspect damper solenoid.
- Test for 1.5-3.3 ohms between the control circuit terminal and the low reference circuit terminal.
| ⇒ | If not within the specified range, replace 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 applicable, 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
