44B0

44B0-REAR LEFT WHEEL SPEED SENSOR CIRCUIT HIGH





For a complete wiring diagram, Refer to the Wiring Information Electrical Diagrams.

- When Monitored:
With the ignition on.

- Set Condition:
When the Rear Left Wheel Speed Sensor circuit fails the diagnostic test.





1. CHECK FOR DTC 44B0-REAR LEFT WHEEL SPEED SENSOR CIRCUIT HIGH

NOTE: This DTC must be active for the results of this test to be valid.

1. Turn the ignition on.
2. With the scan tool, record and erase DTCs.
3. Cycle the ignition switch from off to on.
4. With the scan tool, read DTCs.

Does the scan tool display: 44B0-REAR LEFT WHEEL SPEED SENSOR CIRCUIT HIGH?

Yes

- Go To 2

No

- Refer to the INTERMITTENT CONDITION diagnostic procedure.Testing and Inspection

2. CHECK CONNECTOR/TERMINAL FOR DAMAGE

NOTE: Check all terminals for broken, bent, pushed out, or corroded terminals.

1. Turn the ignition off.
2. Inspect the Anti-Lock Brake Module harness connector, Rear Left WSS, and Rear Left WSS harness connector.

Is the Rear Left WSS or any of the connectors/terminals damaged?

Yes

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

No

- Go To 3

3. CHECK (24) REAR LEFT WSS SUPPLY CIRCUIT SHORT TO GROUND




1. Turn the ignition off.
2. Disconnect the Rear Left WSS harness connector.
3. Disconnect the Anti-Lock Brake Module harness connector.
4. Using a 12-volt test light connected to 12-volts, probe the (24) Rear Left WSS Supply circuit.

Does the test light illuminate brightly?

Yes

- Repair the (24) Rear Left WSS Supply circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. Verification Tests.

No

- Go To 4

4. CHECK (23) REAR LEFT WSS SIGNAL CIRCUIT SHORT TO GROUND




1. Using a 12-volt test light connected to 12-volts, probe the (23) Rear Left WSS Signal circuit.

Does the test light illuminate brightly?

Yes

- Repair the (23) Rear Left WSS Signal circuit for a short to ground.
- Perform the ABS VERIFICATION TEST. Verification Tests.

No

- Go To 5

5. CHECK (24) REAR LEFT WSS SUPPLY CIRCUIT OPEN




1. Connect a jumper wire between ground and the (24) Rear Left WSS Supply circuit in the Anti-Lock Brakes Module harness connector.
2. Using a 12-volt test light connected to 12-volts, probe the (24) Rear Left WSS Supply circuit.

Does the test light illuminate brightly?

Yes

- Go To 6

No

- Repair the (24) Rear Left WSS Supply circuit for an open.
- Perform the ABS VERIFICATION TEST. Verification Tests.

6. CHECK (23) REAR LEFT WSS SIGNAL CIRCUIT OPEN




1. Connect a jumper wire between ground and the (23) Rear Left WSS Signal circuit in the Anti-Lock Brakes Module harness connector.
2. Using a 12-volt test light connected to 12-volts, probe the (23) Rear Left WSS Signal circuit.

Does the test light illuminate brightly?

Yes

- Go To 7

No

- Repair the (23) Rear Left WSS Signal circuit for an open.
- Perform the ABS VERIFICATION TEST. Verification Tests.

7. CHECK (24) REAR LEFT WSS SIGNAL CIRCUIT SHORT TO VOLTAGE




1. Turn the ignition on.
2. Remove all jumper wires.
3. Measure the voltage between the (24) Rear Left WSS Signal circuit and ground.

Is the voltage above one volt?

Yes

- Repair the (24) Rear Left WSS Signal circuit for a short to voltage.
- Perform the ABS VERIFICATION TEST. Verification Tests.

No

- Go To 8

8. CHECK (23) REAR LEFT WSS SIGNAL CIRCUIT SHORT TO VOLTAGE




1. Measure the voltage between the (23) Rear Left WSS Signal circuit and ground.

Is the voltage above one volt?

Yes

- Repair the (23) Rear Left WSS Signal circuit for a short to voltage.
- Perform the ABS VERIFICATION TEST. Verification Tests.

No

- Go To 9

9. CHECK (23) REAR LEFT WSS SIGNAL CIRCUIT AND (24) REAR LEFT WSS SUPPLY CIRCUIT SHORT TOGETHER




1. Turn the ignition off.
2. Measure the resistance between the (23) Rear Left WSS Signal circuit and the (24) Rear Left WSS Supply circuit.

Is the resistance above 5.0 Ohms?

Yes

- Go To 10

No

- Repair the (23) Rear Left WSS Signal circuit and the (24) Rear Left WSS Supply circuit for a short together.
- Perform the ABS VERIFICATION TEST. Verification Tests.

10. REAR LEFT WHEEL SPEED SENSOR
1. Replace the Rear Left Wheel Speed Sensor.
2. Perform the ABS VERIFICATION TEST. Verification Tests.

CAUTION: Make sure brake capability is available before road testing.

3. Road test the vehicle over 40 km/h (25 mph).
4. With the scan tool, read ABS DTCs.

Did DTC 44B0-REAR LEFT WHEEL SPEED SENSOR CIRCUIT HIGH reset?

Yes

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

No

- Test Complete.