DTC C0595, C0600, or C0605

 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 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 5V Reference

 C0870 03

 C0595 05

 C0870 07

 --
Right Front Body Acceleration Sensor 5V Reference

 C0870 03

 C0600 05

 C0870 07

 -
Rear Body Acceleration Sensor 5V Reference

 C0870 03

 C0605 05

 C0870 07

 -
Left Front Body Acceleration Sensor Signal

 C0595 02

 C0595 05

 C0595 05, C0870 07

 C0595 0A
Right Front Body Acceleration Sensor Signal

 C0600 02

 C0600 05

 C0600 05, C0870 07

 C0600 0A
Rear Body Acceleration Sensor Signal

 C0605 02

 C0605 05

 C0605 05, C0870 07

 C0605 0A
Left Front Body Acceleration Sensor Low Reference

 -

 C0595 05

 -

 -
Right Front Body Acceleration Sensor Low Reference

 -

 C0600 05

 -

 -
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 9-16 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. Ignition ON, verify that DTC C0870 is not present.
2. If the DTC is present, refer to DTC C0870 to diagnose that DTC prior to this diagnostic.
3. Ignition OFF, disconnect the harness connector at the appropriate vertical body acceleration sensor.
4. Test for less than 5 Ω between the low reference circuit terminal 3 and ground.
5. If greater than the specified value, test the low reference circuit for short to voltage or an open/high resistance. If the circuit tests normal, replace the K19 Suspension Control Module.
6. Ignition ON, test for 4.8-5.2 V between the 5 V reference circuit terminal 1 and ground.
7. If less than the specified value, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K19 Suspension Control Module.
8. If greater than the specified value, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K19 Suspension Control Module.
9. Verify the scan tool Vertical Body Acceleration parameter is less than -3 m/s2.
10. If greater than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, replace the K19 Suspension Control Module.
11. Install a fused jumper wire between the signal circuit terminal 2 and the low reference circuit terminal 3.
12. Verify the scan tool Vertical Body Acceleration parameter is greater than 3 m/s2.
13. If less than the specified value, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K19 Suspension Control Module.
14. If all circuits test normal, replace the vertical body acceleration sensor and verify the DTC does not reset. If the DTC resets, replace the K19 Suspension Control Module.
 Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.


• Electronic Suspension Front Vertical Accelerometer Replacement - Upper

• Electronic Suspension Rear Position Sensor Replacement

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