Section 990 (Four-Wheel Drive Systems)
WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.
- Specifications
- Description And Operation
- Diagnosis And Testing
- Four-Wheel Drive Systems - 1-Speed Torque-On-Demand
- Notes
- Special Tool(s)
- Inspection and Verification
- Symptom Chart
- Connector Circuit Reference
- Pinpoint Tests
- Pinpoint Test A: No Communication With The 4x4 Module (PCM)
- Pinpoint Test B: The Vehicle Does Not Shift Between AWD AUTO and AWD LOCKED Correctly
- Pinpoint Test C: The AWD Indicator Does Not Operate Correctly/Does Not Operate/Flash
- Pinpoint Test D: Straightline Driveline Wind-up
- Pinpoint Test E: AWD System Functional Test
- Pinpoint Test F: The Vehicle Binds In Turns/Resists Turning/Pulsates/Shudders In a Straight Line
- Four-Wheel Drive Systems - 2-Speed Torque-On-Demand
- Notes
- Special Tool(s)
- Inspection and Verification
- 4WD Control Module (PCM) Diagnostic Trouble Code (DTC) Index
- Symptom Chart
- Connector Circuit Reference
- 4WD Module (PCM) C175b
- 4x4 Module (PCM) C175t
- Brake On/Off (BOO) Switch C278 (2-Speed Torque On Demand (TOD))
- Transmission Range (TR) Sensor C167 (2-Speed Torque On Demand (TOD))
- Mode Select Switch (MSS) C284 (2-Speed Torque On Demand (TOD))
- Transfer Case C350 (2-Speed Torque On Demand (TOD))
- Transfer Case Clockwise (CW) and Counterclockwise (CCW) Relays C1173/C1129
- Neutral Tow Switch C2260
- Pinpoint Tests
- Pinpoint Test G: No Communication With The 4x4 Module (PCM)
- Pinpoint Test H: The Vehicle Does Not Shift Between 4WD Auto and 4H Correctly
- Pinpoint Test I: The 4WD Indicators Do Not Operate Correctly/Do Not Operate/Flash
- Pinpoint Test J: Straightline Driveline Wind-up
- Pinpoint Test K: The Vehicle Does Not Shift Between 4-Wheel Drive Auto and 4L Correctly
- Normal Operation
- Possible Causes
- Pinpoint Test M: Neutral Tow Functional Test
- Pinpoint Test N: The Vehicle Binds In Turns/Resists Turning/Pulsates/Shudders In a Straight Line
- Four-Wheel Drive Systems - 1-Speed Torque-On-Demand
- Removal And Installation