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 distance sensing cruise control (DSCC) module monitors the ignition 1 voltage circuit in order to determine if the voltage is within the normal operating range. When the DSCC module detects that the ignition 1 voltage is below 9.2 volts or above 16 volts, DTC C0800 sets.

Conditions for Running the DTC

C0800 03 and 07
* Ignition is in RUN.
* Vehicle speed is greater than 40.2 km/h (25 mph).

Conditions for Setting the DTC

C0800 03
* The DSCC module detects that the ignition 1 voltage is less than 9.2 volts.
* The above condition is present for 7 seconds.

C0800 07
* The DSCC module detects that the ignition 1 voltage is greater than 16 volts.
* The above condition is present for 7 seconds.

Action Taken When the DTC Sets

C0800 03 and 07

The following actions occur:

* Loss of adaptive cruise function
* Cruise Not Ready indicator illuminates in the DIC.

Conditions for Clearing the DTC

* The DTC becomes history when the fault is no longer present.
* A History DTC clears after 100 malfunction-free ignition cycles.
* The DSCC receives a clear code command from the scan tool.

Diagnostic Aids

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

Reference Information
Schematic Reference

Cruise Control Schematics (Electrical Diagrams)
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

Engine running measure and record the voltage at the battery terminals. Verify that the battery voltage is 12.6-15.5 volts.

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 distance sensing cruise control (DSCC) module.
2. Ignition OFF, test for less than 5.0 ohms between the ground circuit terminal 6 and ground.

• 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 ignition 1 voltage circuit terminal 1 and ground.

• If the test lamp did not illuminate , test the ignition 1 circuit for a short to ground or an open/high resistance.

4. If the circuits test normal, test or replace the DSCC module.

Repair Instructions

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

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