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Home >> Jeep >> 2007 >> Commander Overland, RWD >> Repair and Diagnosis >> Engine Performance >> System >> DTCS P3400 To U1403 >> U1120-Lost Wheel Distance Message >> Possible Causes

Possible Causes

Possible Causes 
CAN C BUS CIRCUIT OPEN OR SHORTED
ANTI-LOCK BRAKE MODULE
POWERTRAIN CONTROL MODULE (PCM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. Refer to PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE .

The PCM receives the vehicle speed signal over the CAN C bus from the Anti-lock Brake Module.

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