P1502-VEHICLE SPEED SENSOR 1/2 CORRELATION - NON DRIVE WHEELS

For a complete wiring diagram Refer to Section 8W.

• When Monitored:

  Ignition on and vehicle moving. Brake pedal must not be applied.

• Set Condition:

  The PCM recognizes front axle speed is greater than rear axle speed. One trip fault.

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

Diagnostic Test

NOTE: Check for any Bus Communication DTCs. If no Bus Communication DTCs are set, check for active DTCs stored in the Anti-Lock Brake Module. Any Bus Communication DTCs or VSS DTCs in the Anti-Lock Brake Module must be properly diagnosed before continuing.

NOTE: It may be necessary to drive the vehicle for the fault to become Active.

• Go To 2

• Refer to the INTERMITTENT CONDITION Diagnostic Procedure.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

NOTE: This code can set due to tire circumference differences and from the front or rear wheels being on a slippery surface while the opposite tires are not.

• Repair as necessary. If the code sets during a front OR rear wheel spin condition, no repair is necessary.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

• Go To 3

NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.

• Repair as necessary.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

• Replace and program the Powertrain Control Module per Service Information.
• Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)