Code No.U1190 No receive fault detect signal



caution
  • If the diagnosis code No. U1190 is set, be sure to diagnose the CAN bus line.
  • Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.
  • When the illuminated licence plate is installed, the sensors may not operate because of noise from the plate. (When the ultrasonic noise is received, the bass toned buzzer sound continuously. When the ultrasonic noise stops, the normal operation will be resumed immediately.)

DIAGNOSTIC FUNCTION


When the signals from the ETACS-ECU cannot be received, the corner sensor/back sensor-ECU sets the diagnosis code No.U1190.

JUDGEMENT CRITERIA


Check Conditions
  1. Power supply mode: ON
  2. ETACS-ECU system voltage is at 10 to 16 V.
Judgment Criterion
  1. CAN signal from the ETACS-ECU cannot be received.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics


Use the M.U.T.-III to diagnose the CAN bus lines.

Q. Is the check result normal?

Go to Step 2.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 2. M.U.T.-III other system diagnosis code


Check again if the diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?

Diagnose the ETACS-ECU (Refer to GROUP 54A, Troubleshooting ).

Go to Step 3.

STEP 3. M.U.T.-III other system diagnosis code


Check again if the diagnosis code is set to the SRS-ECU.

Q. Is the diagnosis code set?

Replace the ETACS-ECU.

Go to Step 4.

STEP 4. Diagnosis code recheck


Check again if the diagnosis code is set to the corner sensor/back sensor-ECU.
(1)Erase the diagnosis code.
(2)Turn the engine switch from the LOCK (OFF) position to the ON position.
(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the corner sensor/back sensor-ECU.

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction ).