Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

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HOMESERVICE MANUALSFORD2007ESCAPE BASE, 2.3 Z, FWD, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 331 (TRANSFER CASE - FOUR-WHEEL DRIVE SYSTEMS)DIAGNOSIS AND TESTINGFOUR WHEEL DRIVE (4WD) SYSTEMSPINPOINT TESTSPINPOINT TEST B: NO COMMUNICATION WITH THE 4-WHEEL DRIVE (4WD) CONTROL MODULEPINPOINT TEST B: NO COMMUNICATION WITH THE FOUR-WHEEL DRIVE (4WD) CONTROL MODULE

2007 Ford Escape Base, 2.3 Z, FWD, Automatic

Pinpoint Test B: No Communication With The Four-Wheel Drive (4WD) Control Module

2007 Ford Escape Base, 2.3 Z, FWD, AutomaticSECTION Pinpoint Test B: No Communication With The Four-Wheel Drive (4WD) Control Module

WARNING: This page is about a different car, the 2006 Mercury Mariner and 2006 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Conduct Steps 1 through 7 outlined in Inspection and Verification prior to performing this test.

B1 CHECK FOR COMMUNICATION TO OTHER MODULES
- Using the diagnostic tool, attempt communication with other modules on the high speed CAN.
- Does the diagnostic tool communicate with other high speed CAN modules?
Yes : GO to B2.

No : DIAGNOSE the high speed CAN communication network. REFER to MODULE COMMUNICATIONS NETWORK .
B2 CHECK POWER TO THE 4WD CONTROL MODULE
- Key in OFF position.
- Disconnect: 4WD Control Module C3253.
- Key in ON position.
- Measure the voltage between 4WD control module C3253-6, circuit 704 (DG/LG), harness side and ground; and between 4WD control module C3253-5, circuit 1003 (GY/YE), harness side and ground.
  
  Fig 1: Checking Power To 4WD Control Module
  Courtesy of FORD MOTOR CO.
- Are the voltages greater than 10 volts?
Yes : GO to B3.

No : INSPECT smart junction box (SJB) fuse 18 (10A) or 35 (5A) for an open. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test.
B3 CHECK THE 4WD CONTROL MODULE GROUND
- Key in OFF position.
- Measure the resistance between 4WD control module C3253-15, circuit 57 (BK), harness side and ground.
  
  Fig 2: Checking 4WD Control Module Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 5 ohms?
Yes : REFER to MODULE COMMUNICATIONS NETWORK to continue diagnosis of the CAN circuits.

No : REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.

RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.