Pinpoint Test A: AWD System Functional Test

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 present in turns?
- Yes : GO to PINPOINT TEST E .
- No : GO to A2.
A2 CHECK ABS MODULE WHEEL SPEED SENSORS
- Connect the scan tool.
- Ignition ON.
- Drive the vehicle at 48 km/h (30 mph), 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 2 km/h (1.2 mph) of each other?
- Yes : GO to A3.
- No : REFER to ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .
A3 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 E .
- No : GO to A4.
A4 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 E .
- No : GO to A5.
A5 CHECK TORQUE AT THE REAR WHEELS
- Using the 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 (PTU) .