Pinpoint Test A: AWD System Functional Test

WARNING: This page is about a different car, the 2013 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

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 DTCs. If DTCs are set in other modules, diagnose those DTCs first before continuing.

A1 CHECK FOR ATC SOLENOID LOCK
- Drive the vehicle on a dry, hard surface in turns while applying the accelerator pedal.
Is driveline wind-up/binding present in turns?
- Yes : Keep the engine OFF for at least 10 minutes then repeat the test. CHECK again for wind-up/binding. If no wind-up/binding is found, GO to A3. If still present, GO to PINPOINT TEST F .
- No : GO to A2 .
A2 CHECK THE ACCELERATOR PEDAL FUNCTION
- Ignition ON.
- Using a scan tool, view PCM PID .
- While monitoring the PCM PID APP, press the accelerator pedal.
Does the accelerator pedal position match the APP PID percent value?
- Yes : GO to A3 .
- No : REFER to the ENGINE CONTROLS - INTRODUCTION (EXCEPT DIESEL & HYBRID) (SECTION 0) to diagnose the accelerator pedal position sensor concern.
A3 CHECK ABS MODULE WHEEL SPEED SENSORS
- Using a scan tool, view ABS PIDs.
- While driving the vehicle at 48 km/h (30 mph), monitor the ABS module 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 2 km/h (1.2 mph) of each other?
- Yes : GO to A4 .
- No : REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .
A4 CHECK VEHICLE ACCELERATION IN A STRAIGHT LINE
- Perform 3 accelerations from 0-48 km/h (0-30 mph) in a straight line (1 each with low, medium and full accelerator pedal application).
Does the vehicle pulsate or shudder while accelerating?
- Yes : GO to PINPOINT TEST F .
- No : GO to A5 .
A5 CHECK VEHICLE TURNING ABILITY
- Drive the vehicle in a fully locked turn, on dry pavement, at 8 km/h (5 mph).
Does the vehicle bind in the turn or resist turning?
- Yes : GO to PINPOINT TEST F .
- No : GO to A6 .
A6 CHECK TORQUE AT THE REAR WHEELS
- Using the diagnostic scan tool, energize the ATC solenoid to a constant 90% applied.
- On dry pavement, drive the vehicle in a fully locked turn at 8 km/h (5 mph).
Does the vehicle bind in the turn or resist turning?
- Yes : END the active command. CLEAR all DTCs if set. End of System Functional Test.
- No : CHECK the PTU , REFER to TRANSFER CASE - POWER TRANSFER UNIT .