Pinpoint Test AA: Off-Road Mode Switch Indicator Is Inoperative
Four Wheel Drive (4WD) Systems - Electronic Shift
Pinpoint Tests
Pinpoint Test AA: Off-Road Mode Switch Indicator 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 B12E0:11 (Off Road Indicator: Circuit Short to Ground) - When in off-road mode, the TCCM 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 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 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
PINPOINT TEST AA: OFF-ROAD MODE SWITCH INDICATOR IS INOPERATIVE
NOTE: Make sure the battery is fully charged before performing this pinpoint test.
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AA1 CHECK FOR DTCs
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: Self Test - TCCM.
- Are any DTCs present?
Yes
For DTCs B12E0:11 and B12E0:13, GO to AA2.
For DTC B12E0:12, GO to AA5.
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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AA2 CHECK THE OFF-ROAD INDICATOR CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: TCCM C2371A.
- Disconnect: Off-Road Mode Switch C3393.
- Measure the resistance between TCCM C2371A-8, circuit CCF01 (BN), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes
GO to AA3.
No
REPAIR circuit CCF01 (BN). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AA3 CHECK THE OFF-ROAD INDICATOR CIRCUIT FOR AN OPEN
- Measure the resistance between TCCM C2371A-8, circuit CCF01 (BN), harness side and off-road mode switch C3393-4, circuit CCF01 (BN), harness side.
- Is the resistance less than 5 ohms?
Yes
GO to AA4.
No
REPAIR circuit CCF01 (BN). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
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AA4 CHECK THE OFF-ROAD INPUT SWITCH STATUS (OFF_RD_SW) PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
- Monitor the OFF_RD_SW PID.
- Does the OFF_RD_SW PID status indicate Not Pressed?
Yes
GO to AA7.
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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AA5 CHECK THE OFF-ROAD MODE INDICATOR CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: TCCM C2371A.
- Disconnect: Off-road Mode Switch C3393.
- Ignition ON.
- Measure the voltage between TCCM C2171A-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. REPEAT the self-test.
No
GO to AA6.
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AA6 CHECK THE OFF-ROAD STATUS (OFF_RD_STAT) PID
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - TCCM.
- Press the off-road mode switch button.
- Monitor the OFF_RD_STAT PID.
- Does the PID status indicate Off-Road Mode?
Yes
GO to AA7.
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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AA7 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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