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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.
 
 
DTC SET CONDITIONS
Check Condition
  • Within 5 seconds after the ignition switch is turned to "ON" position.
Judgment Criterion
  • DTC U1190 detection permission or prohibition signal cannot be received from the ETACS-ECU.
 
 
TROUBLESHOOTING HINTS
  • Malfunction of the ETACS-ECU
  • Malfunction of CAN bus line
  • Malfunction of the gateway-ECU
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
cautionTo prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the scan Tool (M.U.T.-IIISE) ."
(2) Turn the ignition switch to the "ON" position.
(3) Diagnose the CAN bus line.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the EPS-ECU diagnostic trouble code
Check if DTC is set in the EPS-ECU.
Is the DTC set?
Go to Step 3.
Go to Step 4.
 
STEP 3. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) On completion, check that the DTC is not set again.
Is the DTC set?
Replace ETACS-ECU (Refer to GROUP 54A, ETACS - Removal and installation ).
A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the gateway-ECU (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points ).
 
STEP 4. Recheck for diagnostic trouble code.
Recheck if the DTC is set.
(1) Erase the DTC.
(2) Turn the ignition switch to the "LOCK" (OFF) position.
(3) Turn the ignition switch to the "ON" position.
(4) On completion, check that the DTC is not set again.
Is the DTC set?
Replace the gateway-ECU (Refer to <From 22 Model year>).
A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the ETACS-ECU and the gateway-ECU (Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points ).