C0800

DTC C0800

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) 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 electronic parking brake control module (EPB) monitors the system voltage circuit to determine if the voltage is within the normal operating range. When the EPB detects that the system voltage is below 9.2 V or above 16 V, the DTC C0800 sets.

Conditions for Running the DTC

* Ignition is ON.
* Engine ON.

Conditions for Setting the DTC

C0800 03
* The EPB detects that the system voltage is less than 9.2 V.
* The above condition is present for 7 seconds.

C0800 07
* The EPB detects that the system voltage is greater than 16 V.
* The above condition is present for 7 seconds.

Action Taken When the DTC Sets

The Driver Information Center (DIC)displays the SERVICE PARKING BRAKE message.

Conditions for Clearing the DTC

The system voltage returns to normal operating range.

Diagnostic Aids

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

Reference Information
Schematic Reference

Park Brake System Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
Electrical Information Reference

* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)

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 battery terminals.
2. Verify that the battery voltage is 12.6-15.5 V.

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

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the electronic park brake module(EPB).
2. Ignition OFF, test for less than 3 Ohms between the ground circuit terminal H and ground.

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

3. Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.

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

4. If all circuits test normal, test or replace the EPB.

Repair Instructions

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

Control Module References (Programming and Relearning) for EPB replacement, setup, and programming