EBC 340/445ESP AWAL
C1011-LEFT FRONT WHEEL SPEED SENSOR SIGNAL ERRATIC PERFORMANCE (EBC340)
For a complete wiring diagram Refer to Diagram/Electrical. Electrical Diagrams
- When Monitored:
With the ignition on and no system under voltage or over voltage condition present.
- Set Condition:
Each time excessive wheel speed sensor acceleration or deceleration is detected, a fault counter increments. If the fault counter exceeds a specified value, the DTC will set.
Diagnostic Test
1. DTC IS ACTIVE
Turn the ignition on.
With the scan tool, clear DTCs.
Turn the ignition off.
Turn the ignition on.
With the scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
- Go To 2
No
- Go To 15
2. WHEEL SPEED SENSOR INSPECTION
Turn the ignition off.
Inspect the Wheel Speed Sensor for proper mounting.
Inspect the Wheel Speed Sensor harness and connector.
Inspect the Wheel Speed Sensor for excessive debris on the sensor.
Were any problems found?
Yes
- Repair as necessary.
- Perform ABS Verification ABS Verification Test
No
- Go To 3
3. TONE WHEEL DAMAGED/MISSING
Inspect the Tone Wheel.
NOTE: The Tone Wheel Teeth should be perfectly square, not bent or nicked.
Were any problems found?
Yes
- Replace the Tone Wheel.
- Perform ABS Verification ABS Verification Test
No
- Go To 4
4. EXCESSIVE WHEEL SPEED SENSOR AIR GAP
Measure the Wheel Speed Sensor Air Gap.
Were any problems found?
Yes
- Repair as necessary.
- Perform ABS Verification ABS Verification Test
No
- Go To 5
5. WHEEL BEARING LOOSE/BINDING
Inspect the wheel bearings for excessive run out or improper clearance.
Were any problems found?
Yes
- Repair as necessary.
- Perform ABS Verification ABS Verification Test
No
- Go To 6
6. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO GROUND
Turn the ignition off.
Disconnect the Left Front Wheel Speed Sensor harness connector.
Disconnect the Anti-lock Brake Module harness connector.
NOTE: Check connector - Clean/repair as necessary.
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 ABS Verification ABS Verification Test
7. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between the (B8) Left Front Wheel Speed Sensor Signal circuit and ground.
Is the resistance above 5.0 ohms?
Yes
- Go To 8
No
- Repair the (B8) Left Front Wheel Speed Sensor Signal circuit for a short to ground.
- Perform ABS Verification ABS Verification Test
8. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT OPEN
Measure the resistance of the (B9) Left Front Wheel Speed Sensor Supply circuit.
Is the resistance below 5 ohms?
Yes
- Go To 9
No
- Repair the open (B9) Left Front Wheel Speed Sensor Supply circuit.
- Perform ABS Verification ABS Verification Test
9. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT OPEN
Measure the resistance of the (B8) Left Front Wheel Speed Sensor Signal circuit.
Is the resistance below 5 ohms?
Yes
- Go To 10
No
- Repair the open (B8) Left Front Wheel Speed Sensor Signal circuit.
- Perform ABS Verification ABS Verification Test
10. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE
Turn the ignition on.
Measure the voltage of the (B9) Left Front Wheel Speed Sensor Supply circuit.
Is there any voltage present?
Yes
- Repair (B9) Left Front Wheel Speed Sensor Supply circuit for a short to voltage.
- Perform ABS Verification ABS Verification Test
No
- Go To 11
11. (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE
Measure the voltage of the (B8) Left Front Wheel Speed Sensor Signal circuit.
Is there any voltage present?
Yes
- Repair the (B8) Left Front Wheel Speed Sensor Signal circuit for a short to voltage.
- Perform ABS Verification ABS Verification Test
No
- Go To 12
12. (B9) LEFT FRONT WHEEL SPEED SENSOR SUPPLY CIRCUIT SHORTED TO THE (B8) LEFT FRONT WHEEL SPEED SENSOR SIGNAL CIRCUIT
Turn the ignition off.
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 Anti-lock Brake Module harness connector.
Is the resistance below 5.0 ohms?
Yes
- Repair (B9) Left Front Wheel Speed Sensor Supply circuit for a short to the (B8) Left Front Wheel Speed Sensor Signal circuit.
- Perform ABS Verification ABS Verification Test
No
- Go To 13
13. LEFT FRONT WHEEL SPEED SENSOR
Turn the ignition off.
Connect the Left Front Wheel Speed Sensor harness connector.
Measure the resistance between the (B9) Left Front Wheel Speed Sensor Supply circuit and (B8) Left Front Wheel Speed Sensor Signal circuit at the Anti-lock Brake Module harness connector.
NOTE: The resistance should be approximately 1600-2300 ohms at 76°F (24.5°C).
Is the resistance within the noted range?
Yes
- Go to 14
No
- Replace the Left Front Wheel Speed Sensor.
- Perform ABS Verification ABS Verification Test
14. ANTI-LOCK BRAKE MODULE
Turn the ignition off.
Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform ABS Verification ABS Verification Test
No
- Replace the Anti-lock Brake Module.
- Perform ABS Verification ABS Verification Test
15. WIRING HARNESS INSPECTION
Turn the ignition off.
NOTE: Towing the vehicle with ignition ON may set this DTC.
Inspect the related wiring harness. Look for any chafed, pierced, pinched, or partially broken wires.
Inspect the related wire harness connectors. Look for broken, bent, pushed out, or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
- Repair as necessary.
- Perform ABS Verification ABS Verification Test
No
- Test Complete.