Pinpoint Test W : Vehicle Binds In A Turn/Resists Turning/Pulsates In A STRAIGHTLINE In 4WD Mode
WARNING: This page is about a different variant/trim than selected.
NOTE:
4X4 is not intended for driving on hard/dry surfaces; using 4X4 mode while driving on these surfaces may produce noises like intermittent clunking, but does not damage driveline components.
- W1 VERIFY THE CONCERN
- Test drive the vehicle on a straight stretch of road in 4A mode.
- Drive the vehicle through turns and parking lot maneuvers.
Does the vehicle bind, pulsate or shudder?
Yes If the problem occurs in 4A mode, GO to W2
; If 4H mode or 4L mode, binding is a normal condition.No GO to Pinpoint Test S . - W2 CHECK THE 4H AND 4L INDICATORS
- Review the test drive notes.
Did the 4X4 (4H) or 4X4 LOW (4L) or powertrain malfunction indicator (wrench light) illuminate in the IPC message center?
Yes If the powertrain malfunction indicator (wrench light) illuminated, GO to W4.If the 4H mode or 4L mode indicators illuminated, GO to W3. No GO to W5. - W3 VERIFY THE FAULT
- Review the test drive notes.
Was 4H mode or 4L mode selected when the 4H or 4L indicators were illuminated in the IPC message center?
Yes The system is functioning correctly. No The fault may have been caused by an intermittent, uncommanded or autolock shift. GO to Pinpoint Test S . - W4 CHECK FOR DTCs
- Enter the following diagnostic mode on the scan tool: TCCM Self-Test.
Are DTCs retrieved?
Yes REFER to the TCCM DTC Chart for diagnosis. No GO to W5. - W5 VERIFY THE CONCERN
- Disconnect: Transfer Case C350 .
- Test drive the vehicle on a straight stretch of road and in turns, and shift the transfer case through each mode. Record any fault conditions.
Is the concern present?
Yes INSPECT the driveline components for damage or wear. REFER to Inspection and Verification. No GO to W6. - W6 CHECK THE 4WD PWM CLUTCH STATUS (4WD_CLTCH_OUT) PID
- Connect: Transfer Case C350 .
- Using the scan tool, clear the DTCs.
- Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
- Monitor the 4WD_CLTCH_OUT PID at closed throttle, KOEO.
- Select 4H mode.
Does the PID indicate 2 to 10% clutch application at closed throttle?
Yes GO to W7. No CHECK the transfer case. REFER to Transfer Case . - W7 CHECK THE ABS MODULE WHEEL SPEED SENSOR PIDs
- Enter the following diagnostic mode on the scan tool: ABS Module DataLogger.
- While driving the vehicle at 30 km/h (18 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)
- Compare the speedometer reading to the wheel speed sensor PIDs.
Do the wheel speed sensor PIDs and speedometer speeds match within 1.5 km/h (1 mph)?
Yes GO to W8. No VERIFY that the 4 road wheels are the same size and have similar tread depth. CHECK the ABS for faults. REFER to Anti-Lock Brake System (ABS) and Stability Control . - W8 CHECK THE ABSOLUTE THROTTLE POSITION (TP_TCCM) PID
- Enter the following diagnostic mode on the scan tool: TCCM DataLogger.
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NOTE: The TP_TCCM PID is APP as communicated by the PCM via HS-CAN.
Slowly move accelerator pedal from closed throttle to WOT and observe the TP_TCCM PID.
Does the TP_TCCM PID value vary between 0% at closed throttle and 100% at WOT ?
Yes GO to W9. No DIAGNOSE the PCM. REFER to the Engine Controls - Powertrain DTC Charts & Descriptions (Except Diesel & Hybrid) . - W9 CHECK THE TRANSFER CASE FRONT DRIVESHAFT OUTPUT
- With the vehicle in NEUTRAL, position it on a hoist. Refer to Jacking and Lifting .
- Rotate the front driveshaft by hand.
Does the front driveshaft rotate freely and does it require less than 45 Nm [33 lb-ft] to rotate?
Yes GO to W10. No CHECK the transfer case. REFER to Transfer Case . - W10 CHECK FOR CORRECT TCCM OPERATION
- Ignition OFF.
- Disconnect all TCCM connectors.
- Check for:
- corrosion.
- damaged pins
- pushed-out pins.
- Connect all TCCM connectors and make sure they are seated correctly.
- Operate the system and verify the concern is still present.
Is the concern still present?
Yes INSTALL a new TCCM. REFER to 4X4 Control Module . No The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. ADDRESS the root cause of the connector concern.