C1233

DTC C1207-C1210, C1221-C1228, or C1232-C1235

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 C1207 00
- Left Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1208 00
- Right Front Wheel Speed Sensor Circuit High Input Malfunction

DTC C1221 00
- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C1222 00
- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C1225 00
- Left Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1226 00
- Right Front Wheel Speed Sensor Circuit Performance Malfunction

DTC C1232 00
- Left Front Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1233 00
- Right Front Wheel Speed Sensor Circuit Low Input Malfunction

Circuit/System Description

The electronic brake control module provides each wheel speed sensor with a signal and low reference circuit. The module applies ignition voltage through the signal circuit to the sensors with the ignition ON. As the wheel spins, a square wave signal is sent back to the module. The electronic brake control module uses the frequency of the square wave signal to calculate the wheel speed then sends a serial data message to other modules indicating the wheel speed.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

A supervised periodic message indicates the wheel speed serial data has not been received.

Action Taken When the DTC Sets

Specific subsystems will not function or operate in degraded mode.

Conditions for Clearing the DTC

* The DTC clears when the diagnostic runs and passes.
* The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Reference Information
Schematic Reference

Antilock Brake System Schematics [1][2]Antilock Brakes / Traction Control Systems
Connector End View Reference

Component Connector End Views Sunshade - Left (D6I)
Description and Operation

ABS Description and Operation Description and Operation
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 Control Module References for scan tool information

Circuit/System Verification

1. Verify DTC C0035, C0040, C0045, or C0050 is not set.

• If any of the DTCs are set
Refer to DTC C0035, C0040, C0045, or C0050 C0035.

• If none of the DTCs are set

2. Replace the K17 electronic brake control module.
3. Verify DTC C1207, C1208, C1221, C1222, C1225, C1226, C1232, or C1233 does not set while operating the vehicle under the Conditions for Running the DTC.

• If any of the DTCs are set
Replace the module that set the DTC.

• If none of the DTCs are set

4. All OK.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Control Module References for electronic brake control module or module replacement, programming and setup