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DTC Description
 
 
CAN COMMUNICATION
CAN (Controller Area Network) is a serial communication line for real time applications. It is an on-vehicle multiplex communication line with high data communication speed and excellent error detection ability. Modern vehicle is equipped with many electronic control units, and each control unit shares information and links with other control units during operation (not independent). In CAN communication, control units are connected with 2 communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each control unit transmits/receives data but selectively reads the 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 detection condition
U2148-87 CAN comm err (brake control unit)
[Controller area network communication error (brake control unit)]
Diagnosis condition When electric motor switch is ON
Signal (terminal) –
Threshold If side radar RH is not transmitting or receiving CAN communication signal
Diagnosis delay time 2 seconds or more
 
 
POSSIBLE CAUSE
CAN communication system
 
 
FAIL-SAFE
The following systems are canceled.
  • BSW
  • Active Blind Spot Assist [ABSA]
  • RCTA
 
 
CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
  1. Change the power supply mode of the electric motor switch to ON (READY indicator: ON).
  2. Perform “Read All DTCs” with M.U.T.-III SE.
  3. Check if the “U2148-87” is detected as the current malfunction in "Diagnostic Trouble Code" of “Side radar (Rear right)”.
Is “U2148-87” detected as the current malfunction?
DTC Diagnosis ProcedureDiagnosis Procedure
-1 To check malfunction symptom before repair: Intermittent IncidentIntermittent Incident
-2 Confirmation after repair: INSPECTION END