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Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - VEHICLE SPEED SENSOR FAILURE

TEST ACTION APPLICABILITY
1 Is this vehicle equipped with the Antilock Brake System?
Yes --> Go To 2
No --> Go To 8		 All
2 With the DRBIII®, read DTCs in Antilock Brakes.
Does the DRBIII® display any Antilock Brake DTC's?
Yes --> Refer to the appropriate category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 3		 All
3 With the DRBIII®, record and erase DTC's.
Turn the ignition off.
Turn the ignition on.
With the DRBIII®, read DTCs.
Does the DRBIII® display VEHICLE SPEED SENSOR FAILURE?
Yes --> Go To 4
No --> The DTC is intermittent. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1  .		 All
4 Disconnect the Controller Antilock 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?
Yes --> Repair the Vehicle Speed Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 5		 All
5 Disconnect the Controller Antilock Brake connector.
Disconnect the Body Control Module C2 connector.
Measure the voltage between the Vehicle Speed Signal circuit and ground.
Is there any voltage present?
Yes --> Repair the Vehicle Speed Signal circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 6		 All
6 Disconnect the Controller Antilock Brake connector.
Connect a jumper wire between Vehicle Speed Signal circuit in the CAB 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?
Yes --> Go To 7
No --> Repair the Vehicle Speed Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1  .		 All
7 If there are no possible causes remaining, view repair.
Repair
Replace the Body Control Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .		 All
8 With the DRBIII®, record and erase DTC's.
Drive the vehicle for a short distance.
With the DRBIII®, read DTCs.
Does the DRBIII® display VEHICLE SPEED SENSOR FAILURE?
Yes --> Go To 9
No --> The DTC is intermittent. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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?
Yes --> Go To 10
No --> Go To 15		 All
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?
Yes --> Replace the Vehicle Speed Sensor in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 11		 All
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?
Yes --> Repair the Vehicle Speed Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 12		 All
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?
Yes --> Repair the Vehicle Speed Signal circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 13		 All
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?
Yes --> Go To 14
No --> Repair the Vehicle Speed Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1  .		 All
14 If there are no possible causes remaining, view repair.
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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?
Yes --> Repair the Vehicle Speed Sensor Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1  .
No --> Go To 16		 All
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?
Yes --> Go To 17
No --> Repair the Vehicle Speed Sensor Supply circuit for an open.
Perform BODY VERIFICATION TEST - VER 1  .		 All
17 If there are no possible causes remaining, view repair.
Repair
Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1  .		 All
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