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 C0595 02: Left Front Acceleration Sensor Circuit Short to Ground
DTC C0595 05: Left Front Acceleration Sensor Circuit High Voltage/Open
DTC C0595 0A: Left Front Acceleration Sensor Circuit Too Slow Transitions
DTC C0600 02: Right Front Acceleration Sensor Circuit Short to Ground
DTC C0600 05: Right Front Acceleration Sensor Circuit High Voltage/Open
DTC C0600 0A: Right Front Acceleration Sensor Circuit Too Slow Transitions
DTC C0605 02: Left Rear Acceleration Sensor Circuit Short to Ground
DTC C0605 05: Left Rear Acceleration Sensor Circuit High Voltage/Open
DTC C0605 0A: Left Rear Acceleration Sensor Circuit Too Slow Transitions

### Diagnostic Fault Information

Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance
--- | --- | --- | --- | ---
Left Front Body Acceleration Sensor 5 V Reference | C0870 03 | C0595 05 | C0870 07 | --
Left Front Body Acceleration Sensor Signal | C0595 02 | C0595 05 | C0595 05 | C0595 0A
Left Front Body Acceleration Sensor Low Reference | -- | C0595 05 | -- | --
Right Front Body Acceleration Sensor 5 V Reference | C0870 03 | C0600 05 | C0870 07 | --
Right Front Body Acceleration Sensor Signal | C0600 02 | C0600 05 | C0600 05 | C0600 0A
Right Front Body Acceleration Sensor Low Reference | -- | C0600 05 | -- | --
Rear Body Acceleration Sensor 5 V Reference | C0870 03 | C0605 05 | C0870 07 | --
Rear Body Acceleration Sensor Signal | C0605 02 | C0605 05 | C0605 05 | C0605 0A
Rear Body Acceleration Sensor Low Reference | -- | C0605 05 | -- | --

### Circuit/System Description

The suspension control module supplies a 5 V reference voltage and a low reference to each body acceleration sensor. The body acceleration sensors supply a signal of 0.5-4.5 V to the suspension control module.

### Conditions for Running the DTC

System voltage is between 9 and 16 V

### Conditions for Setting the DTC

#### C0595 02, C0600 02, and C0605 02

The signal voltage is less than 0.5 V for 1.5 s

#### C0595 05, C0600 05, and C0605 05

The signal voltage is greater than 4.5 V for 1.5 s

#### C0595 0A, C0600 0A, and C0605 0A

• | The number of signal changes is less than specified value for 2.5 s.

• | Vehicle speed is greater than 30 km/h (19 MPH)

### 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, observe the scan tool Vertical Body Acceleration parameters. The readings should be 0 m/s².

### Circuit/System Testing

1. Verify that DTC C0870 is not set.

⇒ | If the DTC is set, refer to DTC C0870 to diagnose that DTC prior to this diagnostic.

2. Ignition OFF, disconnect the harness connector at the appropriate body acceleration sensor.
3. Test for less than 5 Ω between the low reference circuit terminal 3 and ground.

⇒ | If greater than the specified value, test the low reference circuit for a an open/high resistance. If circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module.

4. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.

⇒ | If not within the specified range, test the 5 V reference circuit for an open/high resistance. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module.

5. Test for 4.8-5.2 V between the signal circuit terminal 2 and ground.

⇒ | If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module.

⇒ | If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module.

6. Install a 3 A fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3. Verify the scan tool Vertical Body Acceleration parameter is less than -13 m/s².

⇒ | If greater than the specified value, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the K19 Electronic Suspension Control (ESC) Module.

7. If all circuits test normal, replace the body acceleration sensor and verify the DTC does not reset. If the DTC resets, replace the K19 Electronic Suspension Control (ESC) Module.

### Repair Instructions

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

• | Electronic Suspension Rear Position Sensor Replacement

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