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Pinpoint Test A: AWD (All-Wheel Drive) System Functional Test

WARNING: This page is about a different variant/trim than selected.
WARNING: When directed to drive the vehicle as part of this test, drive the vehicle on a hard surface in an area without traffic to prevent a crash. Failure to follow these instructions may result in personal injury.
NOTE: Check related modules for Diagnostic Trouble Codes (DTCs). If Diagnostic Trouble Codes (DTCs) are set in other modules, diagnose those Diagnostic Trouble Codes (DTCs) first before continuing.
  1. A1 CHECK FOR ACTIVE TORQUE COUPLING SOLENOID LOCK 
    • Drive the vehicle on a dry, hard surface in turns while applying the accelerator pedal.

    Is driveline wind-up present in turns? 

  2. A2 CHECK PCM (POWERTRAIN CONTROL MODULE) WHEEL SPEEDS 
    • Using a scan tool, drive the vehicle at 30 mph (48 km/h) and monitor the following wheel speed sensor PIDs:
      • Left Front Wheel Speed Sensor (LF_WSPD)
      • Left Rear Wheel Speed Sensor (LR_WSPD)
      • Right Front Wheel Speed Sensor (RF_WSPD)
      • Right Rear Wheel Speed Sensor (RR_WSPD)

    Are all 4 wheel speeds within 1.2 mph (2 km/h) of each other? 

  3. A3 CHECK VEHICLE ACCELERATION IN A STRAIGHT LINE 
    • Perform 3 accelerations from mph (km/h) to 30 mph (48 km/h) in a straight line (1 each with low, medium and full accelerator pedal application).

    Does the vehicle pulsate or shudder while accelerating? 

  4. A4 CHECK VEHICLE TURNING ABILITY 
    • Drive the vehicle in a fully locked turn, on dry pavement, at 5 mph (8 km/h).

    Does the vehicle bind in the turn or resist turning? 

  5. A5 CHECK TORQUE AT THE REAR WHEELS 
    • On dry pavement, drive the vehicle in a fully locked turn at 5 mph (8 km/h).

    Does the vehicle bind in the turn or resist turning? 

    • Yes  : END the active command. CLEAR all Diagnostic Trouble Codes (DTCs) if set. End of System Functional Test. The system is operating correctly at this time.
    • No  : CHECK the transfer case,

      Refer to: TRANSFER CASE .

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