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

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

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 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 recorded by active wheel speed sensors and coding rings made up of permanent magnets. Each wheel speed sensor receives a reference voltage of 12 V from the electronic brake control module. Wheel speed sensors emit an AC voltage of 4 - 18 mA on the control module signal circuit. When the wheels rotate, the electronic brake control module uses the frequency of the square signal to calculate the 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 is cleared when a diagnostic test is run and passes.

• The DTC in the history is cleared after 40 consecutive fault-free ignition cycles have taken place.


Reference Information

Schematic Reference

Antilock Brake System Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

ABS 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

Ignition ON, observe the scan tool EBCM Wheel Speed Sensor parameters. The readings for all sensors should indicate the same speed when driving in a straight line at a speed greater than 20 km/h (13 mph).

Circuit/System Testing


1. Ignition ON

2. Verify that DTC C0035, C0040, C0045, or C0050 is no set.

3. If any of the stated DTCs is sets, see DTC C0035, C0040, C0045 or C0050

4. If none of the DTCs is set:

5. Replace the K17 electronic brake control module.

6. Verify that the DTCs C1207 - C1210, C1221 - C1228, or C1232 - C1235 are not set when the vehicle is manoeuvred under the conditions specified in 'Conditions for running of diagnostic trouble codes (DTCs)'

7. If any of the DTCs is set:

8. Replace the control device that set the DTC.

9. If none of the DTCs are set:

10. All OK


Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair.

Control Module References for module replacement, setup and programming