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DTC U1190: No receive fault detect signal
 
 
cautionBefore replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
TROUBLE JUDGMENT
ETACS-ECU sends the DTC (U code) detection permission or prohibition signal to each ECU connected to the CAN bus line. If the radio and CD player 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 stored.
 
 
 
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 ). On completion, go to Step 3.
 
STEP 2. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the radio and CD player.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) On completion, check that the DTC is stored again.
Is the DTC stored?
Replace the ETACS-ECU. (Refer to .) Then go to Step 3.
The procedure is complete.
 
STEP 3. Recheck for diagnostic trouble code.
Recheck if the DTC is stored in the radio and CD player.
(1) Erase the DTC.
(2) Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
(3) On completion, check that the DTC is stored again.
Is the DTC stored?
Return to Step 1.
The procedure is complete.