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DTC C0800

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: Control Module Power Circuit Low Voltage

DTC C0800 07: Control Module Power Circuit High Voltage

DTC C0800 0D: Control Module Power Circuit High Resistance

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

B+

C0800 03

C0800 03

-

-

5V Reference

C0800 03

C0800 03

C0800 07

-

Low Reference

C0800 03

C0800 03

C0800 07

-

Ground

-

C0800 03, C0800 0D

-

-

Circuit/System Description

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

    • Electronic brake control module
    • Power steering control module
    • Steering wheel angle sensor
    • Multi-axis acceleration sensor

Conditions for Running the DTC

Ignition is ON.

Conditions for Setting the DTC

Electronic Brake or Power Steering Control Module - C0800 03

    • The module detects that the system voltage is less than 9.2 V.
    • The above condition is present for 7 seconds.

C0800 07

    • The module detects that the system voltage is greater than 16 V.
    • The above condition is present for 7 seconds.

Electronic Brake Control Module - C0800 0D

The module detects a loss of solenoid ground.

Steering Wheel Angle or Multi-Axis Acceleration Sensor - C0800 03

The module detects that the sensor reference voltage is less than 4.8 V for more than 5 seconds.

C0800 07

The module detects that the sensor reference voltage is greater than 5.2 V for more than 5 seconds.

Action Taken When the DTC Sets

A driver information center 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 value or DTC set in multiple modules/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
    •  Power Steering Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

    •  ABS Description and Operation
    •  Charging System Description and Operation
    •  Power Steering System Description and Operation

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Scan Tool Reference

Control Module References 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 12.6-15.5 V.
    3. ⇒If the battery voltage is not within the specified range, refer to Charging System Test .
  3. Observe the compatible module scan tool Battery Voltage parameters. Verify that the scan tool displays a value that is within 2 V of the C1 Battery terminal voltage.

Circuit/System Testing

K17 Electronic Brake Control Module

  1. Ignition OFF, disconnect the harness connector at the K17 Electronic Brake Control Module.
  2. Ignition OFF, test for less than 3 Ω between the ground circuit terminal 13 and ground.
    3. ⇒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+ circuits listed below and ground:
    4. • Terminal 1
    • Terminal 25
    ⇒If the test lamp does not illuminate, test the circuit for an open/high resistance.
  4. If all circuits test normal, replace the K17 Electronic Brake Control Module. If the DTC resets, replace the compatible sensor.

K43 Power Steering Control Module

  1. Ignition OFF, disconnect the X2 harness connector at the K43 Power Steering Control Module.
  2. Ignition OFF, test for less than 3 Ω between the ground circuit terminal 1 and ground.
    3. ⇒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+ circuit terminal 2 and ground.
    4. ⇒If the test lamp does not illuminate, test the circuit for an open/high resistance.
  4. If all circuits test normal, replace the K43 Power Steering Control Module.

B99 Steering Wheel Angle Sensor

  1. Ignition OFF, disconnect the harness connector at the compatible sensor.
  2. Ignition OFF, test for less than 3 Ω between the low reference circuit terminal 6 and ground.
    3. ⇒If greater than the specified range, test the low reference circuit for an open/high resistance.
  3. Ignition ON, test for 4.8-5.2 V between the 5V Reference circuit terminal 5 and ground:
    4. ⇒If less than the specified range, test the 5V Reference circuit for a Short to ground or an open/high resistance. If the circuit tests normal, replace the K17 Electronic Brake Control Module.
    ⇒If greater than the specified range, test the 5V Reference circuit for a short to voltage. If the circuit tests normal, replace the K17 Electronic Brake Control Module.
  4. If all circuits test normal, test or replace the compatible sensor.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Vehicle Yaw Sensor Replacement
    •  Steering Angle Sensor Replacement
    • Control Module References for the compatible module replacement, setup, and programming
   


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