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DTC C0035, C0040, C0045, or C0050

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 C0035 06: Left Front Wheel Speed Sensor Electrical Failure

DTC C0035 0F: Left Front Wheel Speed Sensor Circuit Erratic Signal

DTC C0035 18: Left Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0035 5A: Left Front Wheel Speed Sensor Plausibility Error

DTC C0040 06: Right Front Wheel Speed Sensor Electrical Failure

DTC C0040 0F: Right Front Wheel Speed Sensor Circuit Erratic Signal

DTC C0040 18: Right Front Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0040 5A: Right Front Wheel Speed Sensor Plausibility Error

DTC C0045 06: Left Rear Wheel Speed Sensor Electrical Failure

DTC C0045 0F: Left Rear Wheel Speed Sensor Circuit Erratic Signal

DTC C0045 18: Left Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0045 5A: Left Rear Wheel Speed Sensor Plausibility Error

DTC C0050 06: Right Rear Wheel Speed Sensor Electrical Failure

DTC C0050 0F: Right Rear Wheel Speed Sensor Circuit Erratic Signal

DTC C0050 18: Right Rear Wheel Speed Sensor Circuit Signal Amplitude Less Than Minimum

DTC C0050 5A: Right Rear Wheel Speed Sensor Plausibility Error

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

Left Front Sensor 12-Volt Reference Circuit

C0035 06

C0035 06

C0035 06

C0035 0F, 18

Left Front Sensor Low Reference Circuit

C0035 06

C0035 06

C0035 06

C0035 0F, 18

Right Front Sensor 12-Volt Reference Circuit

C0040 06

C0040 06

C0040 06

C0040 0F, 18

Right Front Sensor Low Reference Circuit

C0040 06

C0040 06

C0040  06

C0040 0F, 18

Left Rear Sensor 12-Volt Reference Circuit

C0045 06

C0045 06

C0045 06

C0045 0F, 18

Left Rear Sensor Low Reference Circuit

C0045 06

C0045 06

C0045 06

C0045 0F, 18

Right Rear Sensor 12-Volt Reference Circuit

C0050 06

C0050 06

C0050 06

C0050 0F, 18

Right Rear Sensor Low Reference Circuit

C0050 06

C0050 06

C0050 06

C0050 0F, 18

Component

Condition

DTCs

Left Front Wheel Speed Sensor
    • Physical damage
    • Debris on the wheel speed sensor or the encoder ring
    • Loose or improperly mounted sensor
    • Loose or worn wheel bearing
    • Air gap between the wheel speed sensor and the encoder ring too large

C0035 5A

Right Front Wheel Speed Sensor
    • Physical damage
    • Debris on the wheel speed sensor or the encoder ring
    • Loose or improperly mounted sensor
    • Loose or worn wheel bearing
    • Air gap between the wheel speed sensor and the encoder ring too large

C0040 5A

Left Rear Wheel Speed Sensor
    • Physical damage
    • Debris on the wheel speed sensor or the encoder ring
    • Loose or improperly mounted sensor
    • Loose or worn wheel bearing
    • Air gap between the wheel speed sensor and the encoder ring too large

C0045 5A

Right Rear Wheel Speed Sensor
    • Physical damage
    • Debris on the wheel speed sensor or the encoder ring
    • Loose or improperly mounted sensor
    • Loose or worn wheel bearing
    • Air gap between the wheel speed sensor and the encoder ring too large

C0050 5A

Circuit/System Description

The wheel speed sensor receives a 12-volt power supply voltage from the electronic brake control module (EBCM) and provides a DC square wave signal back to the EBCM. As the wheel spins, the EBCM uses the frequency of the square wave signal to calculate the wheel speed.

Conditions for Running the DTC

C0035-C0050 06

    • The ignition is ON.
    • Ignition voltage is greater than 8.0 volts.

C0035-C0050 0F

    • The ignition is ON.
    • Ignition voltage is greater than 8.0 volts.

C0035-C0050 18

    • The ignition is ON.
    • Ignition voltage is greater than 8.0 volts.
    • No other wheel speed circuit DTCs are set.
    • At least two other wheel speed circuits are not 0 km/h.

C0035-C0050 5A

    • The ignition is ON.
    • Ignition voltage is greater than 8.0 volts.
    • The vehicle speed is greater than 20 km/h (12 mph).

Conditions for Setting the DTC

C0035-C0050 06

    • An open circuit is detected on the wheel speed sensor signal circuit.
    • A short circuit to ground is detected on the wheel speed sensor signal circuit.
    • A short circuit to voltage is detected on the wheel speed sensor signal circuit.

C0035-C0050 0F

EBCM detects a rapid variation in the wheel speed. The wheel speed changes 20 km/h (12 mph) or more in 0.007 seconds. The change must occur 56 times with no more than 0.07 seconds between occurrences.

C003-C0050 18

    • One wheel speed is less than 2 km/h (1.2 mph).
    • The remaining wheel speeds are greater than 10 km/h (6.2 mph) for 0.154 seconds.
    • The difference between the remaining wheel speeds is less than 4 km/h (2.5 mph) from each other.

OR

    • The 2 wheel speed is less than 2 km/h (1.2 mph).
    • The other wheel speeds are greater than 10 km/h (6.2 mph) for 20 seconds.
    • The difference between the remaining wheel speeds is less than 4 km/h (2.5 mph) from each other.

C0035-C0050 5A

An erratic signal output of the wheel speed sensor is detected.

Action Taken When the DTC Sets
    • The EBCM disables the antilock brake system (ABS)/traction control system (TCS)/vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
    • The electronic brake distribution (EBD) does not function optimally with multiple wheel speed faults.
    • The ABS indicator turns ON.

Conditions for Clearing the DTC
    • The condition for setting the DTC is no longer present.
    • The EBCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive drive cycles.
    • The DTC can be cleared using a scan tool.

Diagnostic Aids

If 2 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. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedures:

  1. Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons of salt to 8 FL oz of water (10 g of salt to 200 ml of water).
  2. Test drive the vehicle over various road surfaces: bumps, turns, etc., above 40 km/h (25 mph) for at least 30 seconds.
  3. Rinse the area thoroughly when completed.

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

With the scan tool installed drive the vehicle in a straight line at a speed greater than 15 km/h (10 mph), all wheel speed sensors should read the same kilometres per hour.

Circuit/System Testing
  1. Ignition OFF, disconnect the harness connector at the EBCM.
  2. Ignition ON, test for 1 volt between the 12-volt reference circuit terminals of the appropriate sensor listed below and ground.
    3. • LF Sensor circuit terminal 33
    • RF Sensor circuit terminal 19
    • LR Sensor circuit terminal 34
    • RR Sensor circuit terminal 18
    ⇒If not the specified value, test the 12-volt reference circuit for a short circuit to voltage.
  3. Test for 1 volt between the signal circuit terminals of the appropriate sensor listed below and ground.
    4. • LF Sensor circuit terminal 20
    • RF Sensor circuit terminal 32
    • LR Sensor circuit terminal 21
    • RR Sensor circuit terminal 31
    ⇒If not the specified value, test the signal circuit for a short circuit to voltage.
  4. Ignition OFF, test for infinite resistance between the 12-volt reference terminals of the appropriate sensor listed below and ground.
    5. • LF Sensor circuit terminal 33
    • RF Sensor circuit terminal 19
    • LR Sensor circuit terminal 34
    • RR Sensor circuit terminal 18
    ⇒If not the specified value, test the 12-volt reference circuit for a short circuit to ground.
  5. Test for infinite resistance between the following signal circuit terminals of the appropriate sensor listed below and ground.
    6. • LF Sensor circuit terminal 20
    • RF Sensor circuit terminal 32
    • LR Sensor circuit terminal 21
    • RR Sensor circuit terminal 31
    ⇒If not the specified value, test the signal circuit for a short to ground.
  6. Ignition OFF, disconnect the harness connector at the appropriate WSS.
  7. Test for less than 1 ohm between the appropriate 12-volt reference circuit terminals listed below.
    8. • LF Sensor circuit terminal 33 at the EBCM harness connector, and terminal 1 at the WSS harness connector
    • RF Sensor circuit terminal 19 at the EBCM harness connector, and terminal 1 at the WSS harness connector
    • LR Sensor circuit terminal 34 at the EBCM harness connector, and terminal 1 at the WSS harness connector
    • RR Sensor circuit terminal 18 at the EBCM harness connector, and terminal 1 at the WSS harness connector
    ⇒If greater than the specified range, test the 12-volt reference circuit for an open or high resistance.
  8. Test for less than 1 ohm between the appropriate signal circuit terminals listed below.
    9. • LF Sensor circuit terminal 20 at the EBCM harness connector, and terminal 2 at the WSS harness connector
    • RF Sensor circuit terminal 32 at the EBCM harness connector, and terminal 2 at the WSS harness connector
    • LR Sensor circuit terminal 21 at the EBCM harness connector, and terminal 2 at the WSS harness connector
    • RR Sensor circuit terminal 31 at the EBCM harness connector, and terminal 2 at the WSS harness connector
  9. If all circuits test normal, replace the appropriate wheel speed sensor. If the DTC resets replace the EBCM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

    •  Front Wheel Speed Sensor Replacement : Right Side → Left Side
    •  Rear Wheel Speed Sensor Replacement
    • Control Module References for EBCM replacement, setup and programming
   


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