Vehicle Speed Sensor Failure

Monitored & Set Condition

1. When Monitored: With ignition On.
2. Set Condition: If the BCM detects the current in the Vehicle Speed Sensor (rear wheel speed sensor) input is out of range for more than 5 seconds, this code will set. The sensor supplies a square wave signal to the BCM whose period varies with the vehicle speed.

Possible Causes:

• ABS DTC's Present
• Vehicle Speed Sensor Failure DTC Present - ABS
• Vehicle Speed Sensor Failure DTC Present - Non/ABS
• Vehicle Speed Signal Short To Ground
• Vehicle Speed Signal Short To Ground - Non/ABS
• Vehicle Speed Supply Wire Short To Ground
• Vehicle Speed Supply Wire Open
• Vehicle Speed Signal Short To Voltage
• Vehicle Speed Signal Short To Voltage - Non/ABS
• Vehicle Speed Signal Open
• Vehicle Speed Signal Open - Non/ABS
• Vehicle Speed Sensor Open
• Body Control Module-Vehicle Speed Sensor Supply Open
• Body Control Module-Vehicle Speed Signal Open
• Body Control Module - Vehicle Speed Signal Open - Non/ABS

Testing

1. Is this vehicle equipped with the Anti-lock Brake System? If yes, go to next step. If no, go to step  8 .
2. With the DRBIII(R), read DTCs in Anti-lock Brakes. Does the DRBIII(R) display any Anti-lock Brake DTC's? If yes, refer to COMMUNICATION in DIAGNOSTIC TROUBLE CODE IDENTIFICATION  or SYMPTOM IDENTIFICATION  tables for the related symptom(s). the appropriate category for the related symptom(s). Perform BODY VERIFICATION TEST  . If no, go to next step.
3. With the DRBIII(R), record and erase DTC's. Turn the ignition off. Turn the ignition on. With the DRBIII(R), read DTCs. Does the DRBIII(R) display VEHICLE SPEED SENSOR FAILURE? If yes, go to next step. If no, the DTC is intermittent. Using the wiring diagram as a guide, inspect the wiring and connectors. Perform BODY VERIFICATION TEST  .
4. Disconnect the Controller Anti-lock Brake connector. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Vehicle Speed Signal circuit. Is the resistance below 1000.0 ohms? If yes, repair the Vehicle Speed Signal circuit for a short to ground. Perform BODY VERIFICATION TEST  . If no, go to next step.
5. Measure the voltage between the Vehicle Speed Signal circuit and ground. Is there any voltage present? If yes, repair the Vehicle Speed Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST  . If no, go to next step.
6. Connect a jumper wire between Vehicle Speed Signal circuit in the CAB connector and ground. Measure the resistance between ground and the Vehicle Speed Signal circuit in the BCM connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the Vehicle Speed Signal circuit for an open. Perform BODY VERIFICATION TEST  .
7. If there are no possible causes remaining, replace the Body Control Module. Perform BODY VERIFICATION TEST  .
8. With the DRBIII(R), record and erase DTC's. Drive the vehicle for a short distance. With the DRBIII(R), read DTCs. Does the DRBIII(R) display VEHICLE SPEED SENSOR FAILURE? If yes, go to next step. If no, the DTC is intermittent. Inspect the wiring and connectors. See WIRING DIAGRAMS  . Perform BODY VERIFICATION TEST  .
9. Turn the ignition on. Disconnect the Rear Wheel Speed Sensor connector. Measure the voltage between the Vehicle Speed Sensor Supply circuit and ground. Is the voltage above 10.0 volts? If yes, go to next step. If no, go to Step  15 .
10. Turn the ignition on. Disconnect the Rear Wheel Speed Sensor connector. Measure the resistance between ground and the Vehicle Speed Signal circuit in the harness connector. Is the resistance between 100.0 and 300.0 ohms? If yes, replace the Vehicle Speed Sensor. Perform BODY VERIFICATION TEST  . If no, go to next step.
11. Disconnect the Rear Vehicle Speed Sensor connector. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Vehicle Speed Signal circuit in the harness connector. Is the resistance below 1000.0 ohms? If yes, repair the Vehicle Speed Signal circuit for a short to ground. Perform BODY VERIFICATION TEST  . If no, go to next step.
12. Disconnect the Vehicle Speed Sensor connector. Disconnect the Body Control Module C2 connector. Measure the voltage between the Vehicle Speed Signal circuit and ground. Is there any voltage present? If yes, repair the Vehicle Speed Signal circuit for a short to voltage. Perform BODY VERIFICATION TEST  . If no, go to next step.
13. Disconnect the Vehicle Speed Sensor connector. Connect a jumper wire between Vehicle Speed Signal circuit in the Vehicle Speed Sensor connector and ground. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Vehicle Speed Signal circuit in the BCM connector. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the Vehicle Speed Signal circuit for an open. Perform BODY VERIFICATION TEST  .
14. If there are no possible causes remaining, replace the Body Control Module. Perform BODY VERIFICATION TEST  .
15. Turn the ignition off. Disconnect the Rear Wheel Speed Sensor connector. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Vehicle Speed Sensor Supply circuit. Is the resistance below 100.0 ohms? If yes, repair the Vehicle Speed Sensor Supply circuit for a short to ground. Perform BODY VERIFICATION TEST  . If no, go to next step.
16. Turn the ignition off. Disconnect the Rear Wheel Speed Sensor connector. Connect a jumper wire between Vehicle Speed Sensor Supply circuit and ground. Disconnect the Body Control Module C2 connector. Measure the resistance between ground and the Vehicle Speed Sensor Supply circuit. Is the resistance below 5.0 ohms? If yes, go to next step. If no, repair the Vehicle Speed Sensor Supply circuit for an open. Perform BODY VERIFICATION TEST  .
17. If there are no possible causes remaining, replace the Body Control Module. Perform BODY VERIFICATION TEST  .