C0800

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 03
- Device Power 1 Circuit Voltage Below Threshold

DTC C0800 07
- Device Power 1 Circuit Voltage Above Threshold

Diagnostic Fault Information





Circuit/System Description

The following module/sensors monitor the system voltage circuit to determine if the voltage is within the normal operating range:

* Power steering control module
* Electronic brake control module
* Steering wheel angle sensor
* Rear differential clutch control module
* Multi-axis acceleration sensor

Conditions for Running the DTC

Ignition is ON.

Conditions for Setting the DTC

C0800 03

The module/sensor detects that the system voltage is less than 9.2 V for 7 seconds.

C0800 07

The module/sensor detects that the system voltage is greater than 16 V for 7 seconds.

Action Taken When the DTC Sets

A DIC message and/or a warning indicator may be displayed.

Conditions for Clearing the DTC

The system voltage returns to normal operating range.

Diagnostic Aids

* A high or low voltage DTC set in multiple module/sensors indicates a concern in the charging system.
* A possible cause of this DTC could be overcharging with a battery charger or jump starting.

Reference Information
Schematic Reference

* Antilock Brake System Schematics (Electrical Diagrams)
* Power Steering Schematics (Electrical Diagrams)
* Rear Axle Schematics (Electrical Diagrams)

Control Module References (Programming and Relearning)
Connector End View Reference

Component Connector End Views (Connector Views)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Engine running, measure and record the voltage at the C1 battery terminals.
2. Verify that the battery voltage is 12.6-15.0 V.

• If the battery voltage is not within the specified range, refer to Charging System Test (Charging System Test).

3. Observe the scan tool of the appropriate module Battery Positive parameter. Verify that the scan tool displays a voltage that is within 2 V of the C1 battery terminal voltage.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connectors at the appropriate module/sensor.
2. Test for less than 3 Ohms between the ground circuit terminals listed below and ground:

* Terminal 1 X2, K43 Power steering control module
* Terminal 16, K17 Electronic brake control module
* Terminal F X1, K47 Rear differential clutch control module
* Terminal 6, B99 Steering wheel angle sensor
* Terminal 6, B119 Multi-axis acceleration sensor

• If greater than the specified range, test the ground circuit for an open/high resistance.

3. Ignition ON, verify a test lamp illuminates between the B+/ignition circuits listed below and ground:

* Terminal 2 X2, K43 Power steering control module
* Terminal 1, K17 Electronic brake control module
* Terminal 32, K17 Electronic brake control module
* Terminal G X1, K47 Rear differential clutch control module
* Terminal 5, B99 Steering wheel angle sensor
* Terminal 5, B119 Multi-axis acceleration sensor

• If the test lamp does not illuminate, test the circuit for an open/high resistance.

4. If all circuits test normal, replace the appropriate module/sensor.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

* Vehicle Yaw Sensor Replacement (Service and Repair)
* Steering Angle Sensor Replacement (Removal and Replacement)
* Control Module References (Programming and Relearning) for the appropriate module replacement, setup, and programming