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C1235




DTC C0035-C0050, 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 C0035 04
- Left Front Wheel Speed Sensor Circuit Open

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

DTC C0035 26
- Left Front Wheel Speed Sensor Circuit Low Frequency

DTC C1221 00
- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C0035 27
- Left Front Wheel Speed Sensor Circuit High Frequency

DTC C1225 00
- Left Front Wheel Speed Sensor Circuit Performance

DTC C0035 0E
- Left Front Wheel Speed Sensor Circuit Low Resistance

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

DTC C0035 1F
- Left Front Wheel Speed Sensor Circuit Erratic

DTC C1221 00
- Left Front Wheel Speed Sensor Circuit Malfunction

DTC C0040 04
- Right Front Wheel Speed Sensor Circuit Open

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

DTC C0040 0E
- Right Front Wheel Speed Sensor Circuit Low Resistance

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

DTC C0040 1F
- Right Front Wheel Speed Sensor Circuit Erratic

DTC C1222 00
- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C0040 26
- Right Front Wheel Speed Sensor Circuit Low Frequency

DTC C1222 00
- Right Front Wheel Speed Sensor Circuit Malfunction

DTC C0040 27
- Right Front Wheel Speed Sensor Circuit High Frequency

DTC C1226 00
- Right Front Wheel Speed Sensor Circuit Performance

DTC C0045 04
- Left Rear Wheel Speed Sensor Circuit Open

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

DTC C0045 0E
- Left Rear Wheel Speed Sensor Circuit Low Resistance

DTC C1209 00
- Left Rear Wheel Speed Sensor Circuit High Input

DTC C0045 1F
- Left Rear Wheel Speed Sensor Circuit Erratic

DTC C1223 00
- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C0045 26
- Left Rear Wheel Speed Sensor Circuit Low Frequency

DTC C1223 00
- Left Rear Wheel Speed Sensor Circuit Malfunction

DTC C0045 27
- Left Rear Wheel Speed Sensor Circuit High Frequency

DTC C1227 00
- Left Rear Wheel Speed Sensor Circuit Performance

DTC C0050 04
- Right Rear Wheel Speed Sensor Circuit Open

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

DTC C0050 0E
- Right Rear Wheel Speed Sensor Circuit Low Resistance

DTC C1210 00
- Right Rear Wheel Speed Sensor Circuit High Input

DTC C0050 1F
- Right Rear Wheel Speed Sensor Circuit Erratic

DTC C1224 00
- Right Rear Wheel Speed Sensor Circuit Malfunction

DTC C0050 26
- Right Rear Wheel Speed Sensor Circuit Low Frequency

DTC C1224 00
- Right Rear Wheel Speed Sensor Circuit Malfunction

DTC C0050 27
- Right Rear Wheel Speed Sensor Circuit High Frequency

DTC C1228 00
- Right Rear Wheel Speed Sensor Circuit Performance

Diagnostic Fault Information










Circuit/System Description

The wheel speed sensor receives ignition voltage from the electronic brake control module and provides a DC square wave signal back to the module. As the wheel spins, the electronic brake control module uses the frequency of the square wave signal to calculate the wheel speed.

Conditions for Running the DTC

* Vehicle On or Vehicle in Service Mode
* Ignition voltage is greater than 10 V.

Conditions for Setting the DTC

C0035 04 - C0050 04 or C1232 00 - C1235 00
* An open or a high resistance is detected on a wheel speed sensor ignition circuit.
* A short to ground or an open/high resistance is detected on a wheel speed sensor signal circuit.

C0035 0E - C0050 0E or C1207 00 - C1210 00
* A short to ground is detected on a wheel speed sensor ignition circuit.
* A short to voltage is detected on a wheel speed sensor signal circuit.

C0035 26 - C0050 26, C0035 27 - C0050 27, C0035 1F - C0050 1F, C1221 00 - C1224 00, or C1225 00 - C1228 00
* Incorrectly mounted wheel speed sensor
* Water intrusion in the wiring harness
* Debris on the wheel speed sensor or the tone ring
* Missing tooth or teeth on the wheel speed sensor tone ring
* The tone ring may be demagnetized
* Air gap between the wheel speed sensor and the tone ring too large
* Electrical magnetic interference with the wheel speed sensor harness

Actions Taken when the DTC Sets

* The ABS indicator turns ON.
* The traction control/stability control indicator turns ON.
* The Service Brake Assist and Service StabiliTrak messages are displayed on the driver information center.
* The electronic brake control module disables the antilock brake system, he traction control system and the electronic stability program for the duration of the drive cycle.

Conditions for Clearing the DTC

* The condition for setting the DTC is no longer present.
* The history DTC will clear after 40 consecutive fault-free drive cycles have occurred.

Diagnostic Aids

* Do not use a magnet to clean the tone ring.
* Inspect the wheel hub bearing tone ring for rust or corrosion.
* If two or more wheel speed sensors are inoperative, diagnose each wheel speed sensor individually.
* If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion.

Reference Information
Schematic Reference

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

Component Connector End Views Hybrid/EV Battery Pack X1
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 Programming and Relearning for scan tool information

Circuit/System Verification

1. Test drive the vehicle in a straight line at a speed greater than 20 km/h (13 mph).
2. Verify all scan tool Wheel Speed Sensor parameters are within 1.6 km/h (1 mph) of each other.

• If any parameter is not within 1.6 km/h (1 mph) of each other
Refer to Circuit/System Testing.

• If each parameter is within 1.6 km/h (1 mph) of each other

3. All OK.

Circuit/System Testing

Note: If any of the symptom codes 26, 27, or 1F are set, refer to the Diagnostic Fault Information table for possible mechanical faults or conditions.

1. Vehicle OFF, disconnect the harness connector at the appropriate B5 wheel speed sensor, vehicle in service mode.
2. Test for greater than 11 V between the ignition circuit terminal 1 and ground.

• If 11 V or less

1. Vehicle OFF, disconnect the harness connector at the K17 electronic brake control module.
2. Test for infinite resistance between the ignition circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

3. Test for less than 2 ohm in the ignition circuit end to end.

• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K17 electronic brake control module.

• If greater than 11 V

3. Install a 3 A fused jumper wire at the ignition circuit terminal 1, vehicle in service mode.
4. Verify the scan tool Wheel Speed Sensor parameter changes while rapidly tapping the fused jumper wire to the signal circuit terminal 2.

• If the parameter does not change

1. Vehicle OFF, disconnect the harness connector at the K17 electronic brake control module, vehicle in service mode.
2. Test for less than 1 V between the signal circuit and ground.

• If 1 V or greater, repair the short to voltage on the circuit.

• If less than 1 V

3. Vehicle OFF.
4. Test for infinite resistance between the signal circuit and ground.

• If less than infinite resistance, repair the short to ground on the circuit.

• If infinite resistance

5. Test for less than 2 ohm in the signal circuit end to end.

• If 2 ohm or greater, repair the open/high resistance in the circuit.
• If less than 2 ohm, replace the K17 electronic brake control module.

• If the parameter changes

5. Replace the B5 wheel speed sensor.

Repair Instructions

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

* Front Wheel Speed Sensor Replacement Front Wheel Speed Sensor Replacement
* Rear Wheel Speed Sensor Replacement Rear Wheel Speed Sensor Replacement
* Control Module References Programming and Relearning for electronic brake control module replacement, programming and setup

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