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DTC U1190: No receive fault detect signal
 
 
caution
  • If DTC No. U1190 is stored, be sure to diagnose the CAN bus line.
  • When replacing the ECU, always check that the communication circuit is normal.
 
 
JUDGMENT CRITERIA
ETACS-ECU sends the DTC (U code) detection permission or prohibition signal to each ECU connected to the CAN bus line. If the combination meter cannot receive the DTC (U code) detection permission or prohibition signal for 5 seconds after turning the electric motor switch to ON position, DTC U1190 will be set.
 
 
TROUBLESHOOTING HINTS
  • The CAN bus line may be defective.
  • The ETACS-ECU may be defective.
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III).
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III) ."
(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 GROUP 54C - Diagnosis ).
 
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the combination meter.
(1) Erase the DTC.
(2) Turn the ignition motor switch from "LOCK" (OFF) position to "ON" position.
(3) On completion, check that the DTC is reset.
Is the DTC stored?
Replace the ETACS-ECU. Then go to Step 3.
The procedure is complete.
 
STEP 3. Recheck for diagnostic trouble code.
Recheck if the DTC is stored in the combination meter.
(1) Erase the DTC.
(2) Turn the ignition motor switch from "LOCK" (OFF) position to "ON" position.
(3) On completion, check that the DTC is reset.
Is the DTC stored?
Return to Step 1.
The procedure is complete.