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DTC Description
CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle multiplex communication system with high data communication speed and excellent error detectability. Many electronic control units are equipped onto vehicles, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with two communication lines (CAN-H line, CAN-L line) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to CAN Communication Signal Chart.
 
 
DTC DETECTION LOGIC
DTC No.M.U.T.-III SE screen terms
(Trouble diagnosis content)
DTC detected condition
U2148-87CAN COMM CIRCUIT
(CAN communication circuit)
Diagnosis conditionWhen electric motor switch is ON.
Signal (terminal)CAN communication signal
ThresholdWhen combination meter is not transmitting or receiving
Diagnosis delay time2 seconds or more
 
 
POSSIBLE CAUSE
CAN communication system
 
 
FAIL-SAFE
The combination meter activates the fail-safe control if CAN communication with each unit is malfunctioning.
Refer to Fail-Safe.
 
 
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
  1. Turn electric motor switch ON and wait for 2 seconds or more.
  2. Check "Diagnostic Trouble Code" of “METER/M&A.”
Is DTC U2148-87 detected?
Refer to Diagnosis Procedure.
-1To check malfunction symptom before repair: Refer to Intermittent IncidentHOW TO COPE WITH INTERMITTENT MALFUNCTIONS.
-2Confirmation after repair: INSPECTION END