Pinpoint Test Q: DTC P1833:00 And P1835:00

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.

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

Q1 CHECK FOR DTCs
NOTE: Failure to place the Mode Select Switch (MSS) in 2H or OFF prior to carrying out a self-test of the TCCM (to disable the ELD field coil) results in inaccurate self-test.
- Ignition ON.
- Set the Mode Select Switch (MSS) in 2H (Electronic Shift-On-The-Fly (ESOF).
- Set the Mode Select Switch (MSS) in OFF (2-Wheel Drive (2WD) or MSOS).
- Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
- Are any DTCs present?
- Yes : For DTC P1833:00, GO to Q4.
  For DTC P1835:00, GO to Q2.
  
  For all other DTCs, REFER to the Transfer Case Control Module (TCCM) DTC Chart .
- No : IDENTIFY the customer concern and GO to SYMPTOM CHART - FOUR-WHEEL DRIVE (4WD) SYSTEM .
Q2 CHECK FOR TCCM DTCs WITH THE ELD FIELD COIL DISCONNECTED
- Ignition OFF.
- Disconnect: ELD Field Coil C4359.
- Ignition ON.
- Set the Mode Select Switch (MSS) in 2H (Electronic Shift-On-The-Fly (ESOF).
- Set the Mode Select Switch (MSS) in OFF (2-Wheel Drive (2WD) or MSOS).
- Enter the following diagnostic mode on the scan tool: Self-Test - TCCM.
- CLEAR the DTCs. REPEAT the self-test. Does DTC P1835:00 return?
- Yes : GO to Q3.
- No : INSTALL a new ELD field coil. REFER to REAR DRIVE AXLE/DIFFERENTIAL - FORD 10.50-INCH RING GEAR . CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
Q3 CHECK THE ELD DIFFERENTIAL LOCK CONTROL CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: TCCM C2371B.
- Measure the resistance between TCCM C2371B-9, circuit CCF31 (BN/VT), harness side and ground.
  
  Fig 1: Measuring Resistance Between TCCM C2371B-9, Circuit CCF31 (BN/VT) And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10, 000 ohms?
- Yes : GO to Q5.
- No : REPAIR circuit CCF31 (BN/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
Q4 CHECK THE ELD DIFFERENTIAL LOCK CONTROL CIRCUIT FOR AN OPEN
- Ignition OFF.
- Disconnect: TCCM C2371B.
- Disconnect: ELD Field Coil C4359.
- Measure the resistance between TCCM C2371B-9, circuit CCF31 (BN/VT), harness side and ELD field coil C4359-1, circuit CCF31 (BN/VT), harness side.
  
  Fig 2: Measuring Resistance Between TCCM C2371B-9, Circuit CCF31 (BN/VT) And ELD Field Coil C4359-1, Circuit CCF31 (BN/VT)
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
- Yes : GO to Q5.
- No : REPAIR circuit CCF31 (BN/VT). CLEAR the DTCs. TEST the system for normal operation. REPEAT the self-test.
Q5 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) . 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.