Pinpoint Test K: Off-Road Mode Is Inoperative
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Test K: Off-Road Mode 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 B12E5:00 (Off Road Mode Select Switch: No Sub Type Information)- When in off-road mode, the TCCM (Transfer Case Control Module) C2371A-12 senses if the switch is pressed for more than 30 seconds or if a short to ground on the switch circuit has occurred.
- DTC B12E5:11 (Off Road Mode Select Switch: Circuit Short To Ground) - The TCCM (Transfer Case Control Module) C2371A-12 senses a short to ground on the switch control circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Off-road mode switch
- TCCM (Transfer Case Control Module)
PINPOINT TEST K : OFF-ROAD MODE IS INOPERATIVE
NOTE:
Make sure the battery is fully charged before performing this pinpoint test.
K1 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
If DTCs B12E5:00 or B12E5:11 are retrieved, GO to K2.
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
K2 CHECK THE OFF-ROAD MODE SWITCH 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-12, circuit CCF11 (YE/VT), harness side and ground.
Is the resistance greater than 10,000 ohms?
Yes
GO to K3.
No
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation.
K3 CHECK THE OFF-ROAD MODE SWITCH CIRCUIT FOR AN OPEN
- Measure the resistance between TCCM (Transfer Case Control Module) C2371A-12, circuit CCF11 (YE/VT), harness side and off-road mode switch C3393-1, circuit CCF11 (YE/VT), harness side.
Is the resistance less than 3 ohms?
Yes
GO to K4.
No
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation.
K4 CHECK THE OFF-ROAD MODE SWITCH
- Measure the resistance between off-road mode switch C3393-6, circuit CCF11, component side and off-road mode switch C3393-1, circuit CCF11, component side.
Is the resistance greater than 10,000 ohms?
Yes
GO to K5.
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.
K5 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.