For 1990-2009 cars

### 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 Descriptor

DTC C0575 02: Left Front Actuator Circuit Short to Ground
DTC C0575 04: Left Front Wheel Speed Sensor Circuit Open
DTC C0575 0F: Left Front Wheel Speed Sensor Circuit Signal Erratic
DTC C0580 02: Right Front Actuator Circuit Short to Ground
DTC C0580 04: Right Front Actuator Circuit Open
DTC C0580 0F: Right Front Actuator Circuit Signal Erratic
DTC C0585 02: Left Rear Actuator Circuit Short to Ground
DTC C0585 04: Left Rear Actuator Circuit Open
DTC C0585 0F: Left Rear Actuator Circuit Signal Erratic
DTC C0590 02: Right Rear Actuator Circuit Short to Ground
DTC C0590 04: Right Rear Actuator Circuit Open
DTC C0590 0F: Right Rear Actuator Circuit Signal Erratic

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Left Front Actuator Control | C0575 02 | C0575 04 | -- | C0575 0F
Left Front Actuator Low Reference | C0575 02 | C0575 04 | -- | C0575 0F
Right Front Actuator Control | C0580 02 | C0580 04 | -- | C0580 0F
Right Front Actuator Low Reference | C0580 02 | C0580 04 | -- | C0580 0F
Left Rear Actuator Control | C0585 02 | C0585 04 | -- | C0585 0F
Left Rear Actuator Low Reference | C0585 02 | C0585 04 | -- | C0585 0F
Right Rear Actuator Control | C0590 02 | C0590 04 | -- | C0590 0F
Right Rear Actuator Low Reference | C0590 02 | C0590 04 | -- | C0590 0F

### 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 and 16 V

### Conditions for Setting the DTC

#### C0575 02, C0580 02, C0585 02, and C0590 02

A short to ground on the control or low reference circuit is detected.

#### C0575 04, C0580 04, C0585 04, and C0590 04

An open circuit on the control or low reference 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

#### Connector End View Reference

Component Connector End Views

#### Description and Operation

Electronic Suspension Control Description and Operation

#### Electrical Information Reference

• | Circuit Testing

• | Connector Repairs

• | Testing for Intermittent Conditions and Poor Connections

• | Wiring Repairs

#### Scan Tool Reference

Control Module References for scan tool information

### Circuit/System Verification

Ignition ON, command the Damper Actuator Increase and Decrease with a scan tool while observing the Damper Actuator Command parameter. The reading should vary between 100-300 mA.

### Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the K19 Electronic Suspension Control (ESC) Module and at the appropriate damper actuator.
2. Ignition ON, test for less than 0.3 V between the appropriate circuit terminal listed below and ground:

• | Front left damper actuator low reference circuit terminal 13 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator low reference circuit terminal 16 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator low reference circuit terminal 5 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator low reference circuit terminal 2 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If greater than the specified value, test the low reference circuit for a short to voltage.

3. Test for less than 0.3 V between the appropriate circuit terminal listed below and ground:

• | Front left damper actuator control circuit terminal 14 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator control circuit terminal 15 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator control circuit terminal 4 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator control circuit terminal 3 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If greater than the specified value, test the control circuit for a short to voltage.

4. Ignition OFF, test for infinite resistance between the appropriate circuit terminal listed below and ground:

• | Front left damper actuator low reference circuit terminal 13 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator low reference circuit terminal 16 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator low reference circuit terminal 5 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator low reference circuit terminal 2 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If less than the specified value, test the low reference circuit for a short to ground.

5. Test for infinite resistance between the appropriate circuit terminal listed below and ground:

• | Front left damper actuator control circuit terminal 14 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator control circuit terminal 15 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator control circuit terminal 4 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator control circuit terminal 3 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If less than the specified value, test the control circuit for a short to ground.

6. Test for infinite resistance between the appropriate circuit terminals listed below:

• | Front left damper actuator control circuit terminal 14 and low reference circuit terminal 13 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator control circuit terminal 15 and low reference circuit terminal 16 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator control circuit terminal 4 and low reference circuit terminal 5 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator control circuit terminal 3 and low reference circuit terminal 2 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If less than the specified value, test the control circuit and the low reference circuit for a short circuit.

7. Test for less than 5 Ω between the low reference circuit terminal 2 at the harness connector of the appropriate damper actuator and the circuit terminal listed below:

• | Front left damper actuator low reference circuit terminal 13 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator low reference circuit terminal 16 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator low reference circuit terminal 5 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator low reference circuit terminal 2 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If greater than the specified value, test the low reference circuit for a open/high resistance.

8. Test for less than 5 Ω between the control circuit terminal 1 at the harness connector of the appropriate damper actuator and the circuit terminal listed below:

• | Front left damper actuator control circuit terminal 14 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Front right damper actuator control circuit terminal 15 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear left damper actuator control circuit terminal 4 at the K19 Electronic Suspension Control (ESC) Module harness connector

• | Rear right damper actuator control circuit terminal 3 at the K19 Electronic Suspension Control (ESC) Module harness connector

⇒ | If greater than the specified value, test the control circuit for an open/high resistance.

9. If all circuits test normal, test or replace the appropriate damper actuator and verify the DTC does not reset.

⇒ | If the DTC resets, replace the K19 Electronic Suspension Control (ESC) Module.

### Component Testing

#### Static Test

1. Ignition OFF, connect the harness connector at the appropriate damper actuator.
2. Test for 2-3 Ω between the control terminal 1 and the low reference terminal 2.

⇒ | If not within the specified range, replace the damper actuator.

### Repair Instructions

• | Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

• | Strut, Strut Component, and Spring Replacement

• | Shock Absorber Replacement

• | Control Module References for suspension control module replacement, setup and programming