Pinpoint Test E: Vehicle Binds In A Turn Or Resists Turning/Pulsates Or Shudders In A Straight Line

WARNING: This page is about a different variant/trim than selected.

NOTE: Carry out a thorough inspection and verification as outlined before carrying out this pinpoint test.

E1 CHECK FOR TORQUE AT THE REAR WHEELS
- Ignition OFF.
- Disconnect: Active Torque Coupling (ATC) Solenoid (part of rear axle) C3254.
- Drive the vehicle in a straight line on dry pavement.
- Is a pulsation or shudder still present?
- Yes: REFER to DRIVELINE SYSTEM for additional axle diagnosis.
- No: GO to E2.
E2 CHECK TO SEE IF THE ATC SOLENOID IS BEING COMMANDED ON MONITORING 4WD CLUTCH PWM STATUS (4WDCPWMST) PID
- Ignition OFF.
- Connect: ATC Solenoid C3254.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
- Monitor the 4WDCPWMST PID.
- Drive the vehicle no faster than 8 km/h (5 mph) in tight turns on dry pavement while monitoring the ATC solenoid duty cycle.
- Is the duty cycle greater than 20%?
- Yes: Go to E3.
- No: Go to PINPOINT TEST F .
E3 CHECK FOR THE CORRECT WHEEL SPEEDS USING THE WHEEL SPEED SENSORS PIDs
- Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
- While driving 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 E4.
- No: Go to PINPOINT TEST F .
E4 CHECK FOR VALID ACCELERATOR PEDAL POSITION MONITORING ACCELERATOR PEDAL POSITION (AP) PID
- Key ON Engine OFF (KOEO).
- Enter the following diagnostic mode on the scan tool: DataLogger - 4X4 Control Module.
- Monitor AP PID while pressing/releasing the accelerator pedal.
- Does the accelerator position match the PID percent value?
- Yes: GO to E5.
- No: REFER to INTRODUCTION - GASOLINE MODELS to diagnose the engine control system.
E5 CHECK FOR CORRECT 4X4 CONTROL MODULE OPERATION
- Disconnect the 4X4 control module.
- Check the harness and component side connectors for:
  - corrosion.
  - pushed-out/bent pins.
- Check the ATC solenoid jumper harness between the 4X4 control module and the ATC solenoid, located on the rear subframe.
- Connect the 4X4 control module and make sure it seats correctly.
- Operate the system and determine if the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new 4X4 control module. REFER to Removal and Installation . CLEAR the DTCs. REPEAT the self-test.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.