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C100A






C100A-LEFT FRONT WHEEL SPEED SENSOR CIRCUIT





For a complete wiring diagram, refer to the Wiring Information.

NOTE: The Electronic Stability Control (ESC) may also be referred to as Electronic Stability Program (ESP) depending on the vehicle model year and configuration. Certain components may also reference ESP, ESC, or use the traction control symbol.

- When Monitored:
With the ignition on and no system under voltage or over voltage condition present.

- Set Condition:
If the measured wheel speed sensor feedback voltage is less than.304 of a volt, the sensor is considered open.

If the measured wheel speed sensor feedback voltage is greater than 1.39 volts, or if a sensor over current condition is detected, the sensor is considered shorted.

If a shorted or open condition is present for more than 100 msec, the DTC will set.





1. DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs.
3. Cycle the ignition switch from off to on.
4. With the scan tool, select View DTCs.

Is the status Active for this DTC?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform the ABS-INTERMITTENT CONDITION TEST. ABS Intermittent Condition Test.

2. WHEEL SPEED SENSOR INSPECTION
1. Turn the ignition off to the lock position.
2. Inspect the Wheel Speed Sensor for proper mounting.
3. Inspect the Wheel Speed Sensor harness and connector.
4. Inspect the Wheel Speed Sensor for excessive debris on the sensor.

Were any problems found?

Yes

- Repair as necessary.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 3

3. CHECK (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT VOLTAGE




1. Disconnect the Left Front Wheel Speed Sensor harness connector.
2. Turn the ignition on.
3. Measure the voltage between the (B9) Left Front Wheel Speed Sensor Supply circuit and ground.

Is the voltage above 10 volts?

Yes

- Go To 4

No

- Go To 6

4. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition off to the lock position.
2. Disconnect the ABS Module harness connector.
3. Ignition on, engine not running.
4. Measure the voltage of the (B9) Left Front Wheel Speed Sensor Supply circuit at the Left Front Wheel Speed Sensor harness connector.

Is there any voltage present?

Yes

- Repair (B9) Left Front Wheel Speed Sensor Supply circuit for a short to voltage.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 5

5. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Measure the resistance between the (B8) Left Front Wheel Speed Sensor Signal circuit and ground.

Is the resistance above 5.0 Ohms?

Yes

- Replace the Left Front Wheel Speed Sensor.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Repair the (B8) Left Front Wheel Speed Sensor Signal circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

6. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND




1. Turn the ignition off.
2. Disconnect the ABS Module harness connector.
3. Measure the resistance between the (B9) Left Front Wheel Speed Sensor Supply circuit and ground.

Is the resistance above 5.0 Ohms?

Yes

- Go To 7

No

- Repair the (B9) Left Front Wheel Speed Sensor Supply circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

7. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN




1. Measure the resistance of the (B9) Left Front Wheel Speed Sensor Supply circuit between the Left Front Wheel Speed Sensor harness connector and the ABS harness connector.

Is the resistance below 5 Ohms?

Yes

- Go To 8

No

- Repair the open (B9) Left Front Wheel Speed Sensor Supply circuit.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

8. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN




1. Measure the resistance of the (B8) Left Front Wheel Speed Sensor Signal circuit between the Left Front Wheel Speed Sensor harness connector and the ABS harness connector.

Is the resistance below 5 Ohms?

Yes

- Go To 9

No

- Repair the open (B8) Left Front Wheel Speed Sensor Signal circuit.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

9. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE




1. Turn the ignition on.
2. Measure the voltage of the (B8) Left Front Wheel Speed Sensor Signal circuit at the Left Front Wheel Speed Sensor harness connector.

Is there any voltage present?

Yes

- Repair the (B8) Left Front Wheel Speed Sensor Signal circuit for a short to voltage.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Go To 10

10. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT




1. Turn the ignition off to the lock position.
2. Measure the resistance between the (B9) Left Front Wheel Speed Sensor Supply circuit and the (B8) Left Front Wheel Speed Sensor Signal circuit at the ABS Module harness connector.

Is the resistance below 5.0 Ohms?

Yes

- Repair the (B9) Left Front Wheel Speed Sensor Supply circuit for a short to the (B8) Left Front Wheel Speed Sensor Signal circuit.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

No

- Replace the Anti-Lock Brakes Module.
- Perform the ABS VERIFICATION TEST. ABS Verification Test.

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