C1208

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 Descriptor
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 C1209 00
- Left Rear Wheel Speed Sensor Circuit High Input Malfunction

DTC C1210 00
- Right Rear 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 C1223 00
- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C1224 00
- Right Rear 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 C1227 00
- Left Rear Wheel Speed Sensor Circuit Performance Malfunction

DTC C1228 00
- Right Rear 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

DTC C1234 00
- Left Rear Wheel Speed Sensor Circuit Low Input Malfunction

DTC C1235 00
- Right Rear Wheel Speed Sensor Circuit Low Input Malfunction

Circuit/System Description

The wheel speeds are detected by active wheel speed sensors and encoder rings. The encoder ring consists of permanent magnets. Each wheel speed sensor receives ignition voltage from the electronic brake control module. The wheel speed sensor produces changing current between 4 - 18 mA on the electronic brake control module signal circuit. As the wheel spins, the electronic brake control module uses the frequency of the square wave signal to calculate the actual wheel speed.

Conditions for Running the DTC

Ignition ON.

Conditions for Setting the DTC

A supervised periodic message that includes 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 ignition 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 Connector End Views By Name
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. Ignition ON.
2. Verify that 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

3. Replace the K17 electronic brake control module.
4. Verify that DTC C1207 - C1210, C1221 - C1228, or C1232 - C1235 does not set while operating the vehicle under the Conditions for Running the DTC.

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

• If none of the DTCs set

5. All OK.

Repair Instructions

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

Control Module References Control Module References for module replacement, programming and setup