Pinpoint Test J: Off-Road Mode Switch Indicator Is Inoperative

Four Wheel Drive (4WD) Systems - Electronic Shift

Pinpoint Test J: Off-Road Mode Switch Indicator Is Inoperative



Normal Operation

When the off-road switch is depressed, a signal is sent to the TCCM (Transfer Case Control Module) which alerts other modules along the HS-CAN (High Speed Controller Area Network) that off-road mode is being requested. Other vehicle functions change to accommodate off-road mode and an indicator illuminates on the off-road mode switch confirming off-road mode.

- DTC B12E0:11 (Off Road Indicator: Circuit Short to Ground)- When in off-road mode, the TCCM (Transfer Case Control Module) senses the indicator circuit has low voltage and is always illuminated.

- DTC B12E0:12 (Off Road Indicator: Circuit Short to Battery)- When in off-road mode, the TCCM (Transfer Case Control Module) senses the indicator circuit has high voltage and never illuminates.

- DTC B12E0:13 (Off Road Indicator: Circuit Open)- When in off-road mode, the TCCM (Transfer Case Control Module) senses the indicator lamp circuit is open and never illuminates.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- Off-road mode switch

- TCCM (Transfer Case Control Module)

PINPOINT TEST J : OFF-ROAD MODE SWITCH INDICATOR IS INOPERATIVE

NOTE:
Make sure the battery is fully charged before performing this pinpoint test.

J1 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 any DTCs present?

Yes
For DTC B12E0:11, GO to J3.

For DTC B12E0:12, GO to J2.

For DTC B12E0:13, GO to J4
For all other DTCs, REFER to the TCCM (Transfer Case Control Module) DTC Chart Four Wheel Drive (4WD) Systems - Electronic Shift.
No
IDENTIFY the customer concern and GO to Symptom Chart - Four-Wheel Drive (4WD) System. Four Wheel Drive (4WD) Systems - Electronic Shift

J2 CHECK THE OFF-ROAD MODE INDICATOR CIRCUIT FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: TCCM (Transfer Case Control Module) C2371A.

- Disconnect: Off-Road Mode Switch.

- Ignition ON.

- Measure the voltage between TCCM (Transfer Case Control Module) C2371A-8, circuit CCF01 (BN), harness side and ground.






Is any voltage present?

Yes
REPAIR circuit CCF01 (BN). CLEAR the DTCs. TEST the system for normal operation.
No
GO to J3.

J3 CHECK THE OFF-ROAD MODE INDICATOR CIRCUIT FOR A SHORT TO GROUND

- Ignition OFF.

- Disconnect: TCCM (Transfer Case Control Module) C2371A.

- Disconnect: Off-Road Mode Switch.

- Measure the resistance between TCCM (Transfer Case Control Module) C2371A-8, circuit CCF01 (BN), harness side and ground.






Is the resistance greater than 10,000 ohms?

Yes
GO to J4.
No
REPAIR circuit CCF01 (BN). CLEAR the DTCs. TEST the system for normal operation.

J4 CHECK THE OFF-ROAD MODE INDICATOR CIRCUIT FOR AN OPEN

- Ignition OFF.

- Disconnect: TCCM (Transfer Case Control Module) C2371A.

- Disconnect: Off-Road Mode Switch.

- Measure the resistance between TCCM (Transfer Case Control Module) C2371A-8, circuit CCF01 (BN), harness side and off-road mode switch C3393-4, circuit CCF01 (BN), harness side.






Is the resistance less than 3 ohms?

Yes
GO to J5.
No
REPAIR circuit CCF01 (BN). CLEAR the DTCs. TEST the system for normal operation.

J5 CHECK THE TCCM (Transfer Case Control Module) OFF-ROAD INPUT SWITCH STATUS (OFF_RD_SW) PID

- Connect: TCCM (Transfer Case Control Module) C2371A.

- Connect: Off-Road Mode Switch.

- Ignition ON.

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

- Monitor the OFF_RD_SW PID.

Does the OFF_RD_SW PID status indicate Not Pressed?

Yes
GO to J6.
No
INSTALL a new off-road mode switch. PRESS the tab on each side of the switch to remove it from the bezel. CLEAR the DTCs. TEST the system for normal operation.

J6 CHECK THE TCCM (Transfer Case Control Module) OFF-ROAD STATUS (OFF_RD_STAT) PID

- Ignition ON.

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

- Press the off-road mode switch button.

- Monitor the OFF_RD_STAT PID.

Does the PID status indicate Off-Road Mode?

Yes
GO to J7.
No
INSTALL a new off-road mode switch. PRESS the tab on each side of the switch to remove it from the bezel. CLEAR the DTCs. TEST the system for normal operation.

J7 CHECK FOR CORRECT TCCM (Transfer Case Control Module) OPERATION

- Ignition OFF.

- Disconnect and inspect all TCCM (Transfer Case Control Module) connectors.

- Repair:
- corrosion (install new connector or terminals - clean module pins)

- damaged or bent pins - install new terminals/pins

- pushed-out pins - install new pins as necessary


- Connect all TCCM (Transfer Case Control Module) connectors. 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 (Transfer Case Control Module). REFER to Transfer Case Control Module (TCCM) . TEST the system for normal operation.
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 or pin issues.