LEMON Manuals
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Jeep
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2009
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Grand Cherokee Laredo, 4.7 P, RWD
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Repair and Diagnosis
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Transmission
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Transfer Case
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Final Drive Control Module (FDCM) - Electrical Diagnostics
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DTC Troubleshooting
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C1421-Rear Differential Clutch Performance
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Set Conditions
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Set Conditions
Set Condition:
The solenoid duty cycle is greater than 95% and the wheel slippage is greater than 50%.