Pinpoint Test AC: Off-Road Mode Is Inoperative
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Tests
Pinpoint Test AC: Off-Road Mode Is Inoperative
Refer to Wiring Diagram Set 34, Four-Wheel Drive Systems for schematic and connector information. Diagrams By Number
Normal Operation
When the off-road switch is depressed, a signal is sent to the Transfer Case Control Module (TCCM) which alerts other modules along the High Speed Controller Area Network (HS-CAN) 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) - TCCM senses if the switch is pressed for more than 30 seconds or if a short to ground on the switch circuit has occurred. The TCCM determines if a short to ground exists on the switch circuit while the vehicle is in off road mode.
- DTC B12E5:11 (Off Road Mode Select Switch: Circuit Short To Ground) - The TCCM senses a short to ground on the switch control circuit.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- TCCM
PINPOINT TEST AC: OFF-ROAD MODE IS INOPERATIVE
NOTE: Make sure the battery is fully charged before performing this pinpoint test.
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AC1 CHECK FOR DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - TCCM.
- Are any DTCs present?
Yes
If DTCs B12E5:00 or B12E5:11 are retrieved, GO to AC2.
For all other DTCs, REFER to the Transfer Case Control Module (TCCM) DTC Chart. Transfer Case Control Module (TCCM) (DTC) Chart
No
IDENTIFY the customer concern and GO to Symptom Chart - Four-Wheel Drive (4WD) System. Symptom Chart - Four-Wheel Drive (4WD) System
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AC2 CHECK THE OFF-ROAD MODE SWITCH CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: TCCM C2371A.
- Disconnect: Off-Road Mode Switch C3393.
- Measure the resistance between TCCM C2371A-12, circuit CCF11 (YE/VT), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
No
GO to AC3.
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AC3 CHECK THE OFF-ROAD MODE SWITCH CIRCUIT FOR AN OPEN
- Measure the resistance between TCCM 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 5 ohms?
Yes
GO to AC4.
No
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AC4 CHECK THE OFF-ROAD MODE SWITCH
- Measure the resistance between off-road mode switch C3393 pin-1, circuit CCF11, component side and off-road mode switch C3393 pin-6, circuit CCF11, component side.
- Is the resistance greater than 10,000 ohms?
Yes
GO to AC5.
No
INSTALL a new off-road mode switch. REFER to the exploded view in Instrument Cluster / Carrier &/or Interior Moulding / Trim. PRESS the tab on each side of the switch to remove it from the bezel. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AC5 CHECK FOR CORRECT TCCM OPERATION
- Ignition OFF.
- Disconnect all TCCM connectors.
- Check for:
- corrosion.
- 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 Transfer Case Control Module (TCCM) Service and Repair. TEST the system for normal operation.
REPEAT the self-test.
No
The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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