For 1990-2009 cars only
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 C0800 03: Device Power 1 Circuit Voltage Below ThresholdDTC C0800 07: Device Power 1 Circuit Voltage Above Threshold
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
B+ | C0800 03 | C0800 03 | -- | -- |
Ground | -- | C0800 03 | -- | -- |
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
XXXX (EPB)
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Engine running, measure and record the voltage at the battery terminals.
- 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 |
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the electronic park brake module(EPB).
- Ignition OFF, test for less than 3 Ω between the ground circuit terminal H and ground.
- Ignition ON, verify a test lamp illuminates between the B+ circuit terminal A and ground.
- If all circuits test normal, test or replace the EPB.
| ⇒ | If greater than the specified value, test the ground circuit for an open/high resistance. |
| ⇒ | If the test lamp does not illuminate , test the circuit for an open/high resistance. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EPB replacement, setup, and programming
