Symptom Chart - Four Wheel Drive System
WARNING: This page is about a different car, the 2009 Mercury Sable, 2009 Ford Taurus X, and 2009 Ford Taurus. However, it is still accessible from the selected car via links, so may be relevant.
SYMPTOM CHART - FOUR WHEEL DRIVE SYSTEM
| Condition |
Possible Sources |
Action |
- Unable to duplicate customer concern; no DTCs present
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- The concern description is inaccurate
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- CARRY OUT the All-Wheel Drive (AWD) System Functional Test. Go to Pinpoint Test A .
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- Battery voltage is high/low (4X4 control module)
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- Concern with voltage regulator or generator
- Smart Junction Box (SJB) fuse 11 (10A)
- SJB fuse 34 (5A)
- Intermittent open power circuit
- 4X4 control module internal relay failure
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- 4X4 control module received no/invalid data from PCM
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- Invalid data received from PCM
- Data out of range
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- 4X4 control module received no/invalid data from ABS module
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- Invalid data received from the ABS module
- Data out of range
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- High Speed Controller Area Network (HS-CAN) communications bus fault
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- HS-CAN bus fault
- PCM fault
- ABS fault
- Instrument Cluster (IC) fault
- 4X4 control module
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- Vehicle has no or inadequate torque at rear wheels
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- Power Transfer Unit (PTU) mechanical failure
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- Wheels/tires
- Active Torque Coupling (ATC) solenoid (part of rear axle)
- SJB fuse(s):
- 4X4 control module
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- Vehicle binds in a turn or resists turning/pulsates or shudders in a straight line
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- 4X4 control module
- ATC solenoid (part of rear axle)
- Circuitry
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- Tire/axle out of acceptable range
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- Wheels/tires
- Wheel speed sensors
- ABS module
- 4X4 control module
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