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DTC U1190 No receive fault detect signal
 
 
caution
  • If DTC U1190 is set, diagnose the CAN bus lines.
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
DIAGNOSTIC FUNCTION
When the signal from the ETACS-ECU cannot be received, KOS&OSS-ECU sets DTC U1190.
 
 
JUDGMENT CRITERIA
Check Conditions
  • When all the following conditions are met.
    1. Power supply mode: "ON"
    2. ETACS-ECU system voltage is at 10 to 16 volts.
Judgment Criterion
  • After the following condition is met, 5,000 ms or more have elapsed.
    1. CAN signal from the ETACS-ECU cannot be received.
 
 
PROBABLE CAUSES
  • Malfunction of the CAN bus line
  • Malfunction of ETACS-ECU
  • Malfunction of KOS&OSS-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line
Use the scan tool (M.U.T.-IIISE) to diagnose the CAN bus lines.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Diagnosis ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), check the other system DTC.
Check again if the DTC is set in the ETACS-ECU.
Is the DTC set?
Diagnose the ETACS-ECU (Refer to GROUP 54A - ETACS - Diagnosis ).
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), check the other system DTC.
Check again if the DTC is set in the SRS-ECU.
Is the DTC set?
Replace the ETACS-ECU (Refer to GROUP 54A - ETACS - ETACS-ECU ).
Go to Step 4.
 
STEP 4. DTC recheck
Check again if the DTC is set in the KOS&OSS-ECU.
(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from "OFF" to "ON."
(3) Check if the DTC is set.
Is the DTC set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ).
Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction ).