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DTC Description
 
 
DTC DETECTION LOGIC
DTC No.M.U.T.-III SE screen items
(Trouble diagnosis content)
DTC Detection Condition
U2140-57CAN comm err (ECM)
[Control Area Network communication error (ECM)]
Diagnosis condition-
Signal (terminal)-
ThresholdMAC communication error
Diagnosis delay time-
 
 
POSSIBLE CAUSE
  • MAC communication error
  • BCM used in other vehicles is installed in the vehicle
  • BCM
  • ECM
 
 
FAIL-SAFE
-
 
 
DTC CONFIRMATION PROCEDURE
1.CHECK DTC PRIORITY
If DTC U2140-57 is displayed with DTC U1327-52 or DTC U1327-54, first perform the trouble diagnosis for DTC U1327-52 or U1327-54.
Is DTC U1327-52 or U1327-54 detected?
Refer to DTC Description (U1327-52) or DTC Description (U1327-54).
.
 
2.CHECK MAC DIAGNOSIS
With M.U.T.-III SE
  1. Electric motor switch ON.
  2. Perform "MAC Diagnosis" mode of "BCM" using M.U.T.-III SE.
Is DTC U2140-57 detected?
Refer to Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END