C0026

DTC C0026 Circuit Diagram:

CIRCUIT DESCRIPTION
As a toothed ring passes by the wheel speed sensor, changes in the electromagnetic field cause the wheel speed sensor to produce a sinusoidal (AC) voltage signal whose frequency and amplitude is proportional to wheel speed. The magnitude of this signal is directly related to wheel speed and the proximity of the wheel speed sensor to the toothed ring, often referred to as the air gap.

CONDITIONS FOR SETTING DTC
- Left front wheel speed is less than 4 mph.
- All other wheel speeds are greater than 8 mph.
- No unexpected wheel acceleration/deceleration.
- Anything that keeps the left front wheel speed sensor signal low while the vehicle is moving above 8mph.

ACTION TAKEN WHEN DTC IS SET
- ANTILOCK indicator lamp is illuminated
- Antilock Brake System (ABS) is disabled

NOTE: This DTC is a Ignition Latched DTC which indicates the above is true until the ignition is turned to OFF (even if the cause of the DTC is intermittent).

DIAGNOSTIC AIDS
An intermittent malfunction may be caused by a poor connection, rubbed through wire insulation, or a wire that is broken inside the insulation.

Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal to wiring connections or physical damage to the wiring harness.

When inspecting a wheel speed sensor, inspect the sensor terminals and harness connector for corrosion. If evidence of corrosion exists, replace the wheel speed sensor. Refer to Wheel Speed Sensor, Service and Repair. Service and Repair

NOTE: Resistance of the wheel speed sensor will increase with an increase in sensor temperature. Refer to the following table for temperature/resistance values.

^ When temperature is between -40 - 4 °C (-40 - 40 °F) resistance is 702 to 1060 ohms.
^ When temperature is between 5 - 43 °C (41 - 110 °F) resistance is 855 to 1230 ohms.
^ When temperature is between 44 - 93 °C ( 111 - 200 °F) resistance is 1000 to 1440 ohms.
^ When temperature is between 94 - 150 °C (201 - 302 °F) resistance is 1170 to 1661 ohms.

DTC CHART TEST DESCRIPTION

DTC C0026 Diagnostic Chart (Part 1 Of 2):

DTC C0026 Diagnostic Chart (Part 2 Of 2):

NOTE: Number(s) below refer to number(s) on the diagnostic chart.

2. Visually inspect hamess for damage.
3. Measure the resistance of the left front wheel speed sensor.
4. Measure the voltage output of the left front wheel speed sensor.
5. Measure the resistance of the left front sensor harness.