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DTC Description
 
 
DTC DETECTION LOGIC
DTC No.M.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detection condition
U132752MAC key update
(Message Authentication Code key update)
Diagnosis condition—
Signal (terminal)—
ThresholdMAC key writing is incomplete.
Diagnosis delay time—
 
 
POSSIBLE CAUSE
  • Network communication error between M.U.T.-III SE and chassis control module
  • Chassis control module used in other vehicles is installed in the vehicle
  • Chassis control module
 
 
FAIL-SAFE
The following functions are suspended.*
  • Brake auto hold function
  • Drive mode selector function
  • Innovative operation mode function
*: Depends on the DTC detection status
 
 
DTC CONFIRMATION PROCEDURE
1.CHECK DTC PRIORITY
If DTC U1327-52 is displayed with DTC U1327-54, first perform the trouble diagnosis for DTC U1327-54.
Is DTC U1327-52 detected?
Refer to DTC Description.
 
2.PERFORM DTC CONFIRMATION PROCEDURE
With M.U.T.-III SE
  1. Turn the electric motor switch ON.
  2. Perform “MAC key writing”. Refer to Description.
  3. Perform “MAC Diagnosis” of “CHASSIS CONTROL” using M.U.T.-III SE.
Is DTC U1327-52 detected as the current malfunction?
Refer to Diagnosis ProcedureDiagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentIntermittent Incident.
-2Confirmation after repair: INSPECTION END