Pinpoint Test K: Off-Road Mode Is Inoperative

WARNING: This page is about a different car, the 2013 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

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

K1 CHECK FOR TCCM 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 K2.
  For all other DTCs, REFER to the TCCM DTC CHART .
- No : IDENTIFY the customer concern and GO to SYMPTOM CHART - FOUR-WHEEL DRIVE (4WD) SYSTEM .
K2 CHECK THE OFF-ROAD MODE SWITCH CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: TCCM C2371A.
- Disconnect: Off-Road Mode Switch.
- Measure the resistance between TCCM C2371A-12, circuit CCF11 (YE/VT), harness side and ground.
  
  Fig 1: Measuring Resistance Between TCCM C2371A-12, Circuit CCF11 (YE/VT) And Ground
  Courtesy of FORD MOTOR CO.
- 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 C2371A-12, circuit CCF11 (YE/VT), harness side and off-road mode switch C3393-1, circuit CCF11 (YE/VT), harness side.
  
  Fig 2: Measuring Resistance Between TCCM C2371A-12, Circuit CCF11 (YE/VT) And Off-Road Mode Switch C3393-1, Circuit CCF11 (YE/VT)
  Courtesy of FORD MOTOR CO.
- 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.
  
  Fig 3: Measuring Resistance Between Off-Road Mode Switch C3393-6 And Off-Road Mode Switch C3393-1, Circuit CCF11
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes : GO to K5.
- No : INSTALL a new off-road mode switch. REFER to the Console - Floor exploded view in INSTRUMENT PANEL AND CONSOLE . 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 OPERATION
- Ignition OFF.
- Disconnect and inspect all TCCM 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 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. 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.