Electronic Suspension Control

DTC C0800

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC C0800
- Control Module Power Circuit

For symptom byte information, refer to Symptom Byte List Symptom Byte List.

Circuit/System Description

The suspension control module monitors continuous the battery voltage.

Conditions for Running the DTC

System voltage is not between 9-16 V.

Conditions for Setting the DTC

C0800 03

The suspension control module detects that the supply voltage is less then 9 V.

C0800 07

The suspension control module detects that the supply voltage is greater then 16.3 V.

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.

Reference Information

Schematic Reference

Electronic Suspension Control Schematics Electrical Diagrams

Connector End View Reference

Component Connector End Views Fuel Pump and Level Sensor Assembly

Description and Operation

Electronic Suspension Control Description and Operation Description and Operation

Electrical Information Reference

* Circuit Testing Circuit Testing

* Connector Repairs Connector Repairs

* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections

* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Verification

1. Ignition ON

2. Engine running, accessories OFF

3. Test for 12.6-15.0 V between the battery positive terminal and negative terminal.

• If not within 12.6-15.0 V
Refer to Charging System Test Testing and Inspection

• If within 12.6-15.0 V

4. Verify the scan tool Battery Voltage parameter of the affected control module is within a value of 2 V of the battery terminal voltage.

• If not within a value of 2 V
Refer to Circuit/System Testing.

• If within a value of 2 V

5. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

6. Verify the DTC does not set.

• If the DTC sets
Refer to Circuit/System Testing.

• If the DTC does not set

7. All OK.

Circuit/System Testing

1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the K19 Suspension Control Module. It may take up to 2 min for all vehicle systems to power down.

2. Test for less than 10 ohms between the ground circuit terminal 47 and ground.

• If 10 ohms or greater

1. Ignition OFF.

2. Test for less than 2 ohms in the ground circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, repair the open/high resistance in the ground connection.

• If less than 10 ohms

3. Ignition ON.

4. Verify a test lamp illuminates between the B+ circuit terminal 32 and ground:

• If the test lamp does not illuminate and the circuit fuse is OK

1. Ignition OFF.

2. Test for less than 2 ohms in the B+ circuit end to end.

• If 2 ohms or greater, repair the open/high resistance in the circuit.

• If less than 2 ohms, verify the fuse is OK and there is voltage at the fuse.

• If the test lamp does not illuminate and the circuit fuse is open

1. Ignition OFF.

2. Test for infinite resistance between the B+ circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance, replace the K19 Suspension Control Module.

• If the test lamp illuminates

5. Replace the K19 Suspension Control Module.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

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