LEMON Manuals
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Jeep
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2009
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Commander Sport, 3.7 K, AWD
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Repair and Diagnosis
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Electrical
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Horns
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Front Control Module (FCM) - Electrical Diagnostics
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DTC Troubleshooting
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U0252-Lost Communication With Trailer Lighting Module
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Possible Causes
July 1:
So it begins
. Don't worry, this is not in the correct legal jurisdiction!
Possible Causes
Possible Causes
CAN B BUS CIRCUITS OPEN
DTCS RELATED TO BATTERY VOLTAGE, IGNITION, OR VIN MESSAGES
FCM NOT CONFIGURED CORRECTLY
(A114) FUSED B(+) CIRCUIT OPEN OR SHORTED
(Z909) GROUND CIRCUIT OPEN
TRAILER LIGHTING MODULE (TM)
FRONT CONTROL MODULE (FCM)