Pinpoint Test V: The 4X4 Mode Indicators Do Not Operate Correctly/Do Not Operate

Four Wheel Drive (4WD) Systems - 2-Speed Torque-On-Demand

Pinpoint Test V: The 4X4 Mode Indicators Do Not Operate Correctly/Do Not Operate



Normal Operation

The 4WD (Four-Wheel Drive) system status is transmitted to the IPC (Instrument Panel Cluster) from the TCCM (Transfer Case Control Module) through the HS-CAN (High Speed Controller Area Network) to the 4WD (Four-Wheel Drive) indicator. A steady indicator displays if the vehicle is in 4X4 auto (4A), 4X4 (4H) or 4X4 low (4L). When in 2WD (2-Wheel Drive), the message center will display 4X2 for approximately 4 seconds, then the message center will no longer provide 4WD (Four-Wheel Drive) system indication until another shift mode is attained. A system fault condition will illuminate the powertrain malfunction indicator. The powertrain malfunction indicator includes other general powertrain system failures. For information about HS-CAN (High Speed Controller Area Network), refer to Information Bus.

This pinpoint test is intended to diagnose the following:

- IPC (Instrument Panel Cluster)

- 4WD (Four-Wheel Drive) system fault

- HS-CAN (High Speed Controller Area Network) circuits

- TCCM (Transfer Case Control Module)

PINPOINT TEST V : THE 4X4 MODE INDICATORS DO NOT OPERATE CORRECTLY/DO NOT OPERATE

V1 CHECK FOR TCCM (Transfer Case Control Module) DTCs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self-Test- TCCM (Transfer Case Control Module).

Are DTCs present?

Yes
REFER to the TCCM (Transfer Case Control Module) DTC Chart for diagnosis Four Wheel Drive (4WD) Systems - 2-Speed Torque-on-Demand.
No
GO to V2.

V2 CHECK FOR IPC (Instrument Panel Cluster) DTCs

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: Self-Test- IPC (Instrument Panel Cluster).

Are DTCs present?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.
No
GO to V3.

V3 CHECK 4WD (Four-Wheel Drive) SYSTEM OPERATION

- Test drive the vehicle and operate the 4WD (Four-Wheel Drive) system.

Does the 4WD (Four-Wheel Drive) system operate correctly?

Yes
REFER to Instrument Panel, Gauges and Warning Indicators.
No
GO to Symptom Chart - Four Wheel Drive (4WD). Four Wheel Drive (4WD) Systems - 2-Speed Torque-on-Demand