Pinpoint Test AB: Off-Road Mode Is Inoperative
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Tests
Pinpoint Test AB: 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
- Off-road mode switch
- TCCM
PINPOINT TEST AB: OFF-ROAD MODE IS INOPERATIVE
NOTE: Make sure the battery is fully charged before performing this pinpoint test.
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AB1 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 AB2.
For all other DTCs, REFER to the Transfer Case Control Module (TCCM) DTC Chart. Four Wheel Drive (4WD) Systems - Electronic Shift
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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AB2 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 greater than 10,000 ohms?
Yes
GO to AB3.
No
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AB3 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 AB4.
No
REPAIR circuit CCF11 (YE/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AB4 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 AB5.
No
INSTALL a new off-road mode switch. REFER to the exploded view in Instrument Panel and Console Instrument Panel - Exploded View. 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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AB5 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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