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Code No.U1190 No receive fault detect signal
 
 
caution
  • Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are 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 power liftgate control unit 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.
 
 
PROBABLE CAUSES
  • Malfunction of the ETACS-ECU
  • Malfunction of CAN bus line
 
 
DIAGNOSIS
STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the electric motor switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the scan tool (M.U.T.-IIISE) ."
(2) Turn the electric motor switch to ON.
(3) Diagnose the CAN bus line.
(4) Turn the electric motor switch to OFF.
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. Using scan tool (M.U.T.-IIISE), read the other system diagnostic trouble code.
Check again if the DTC is set in the power liftgate control unit.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the electric motor switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the scan tool (M.U.T.-IIISE) ."
(2) Erase the DTC.
(3) Turn the electric motor switch to ON.
(4) Check if DTC is set.
(5) Turn the electric motor switch to OFF.
Is the DTC set?
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 set.
(1) Erase the DTC.
(2) Turn the electric motor switch to ON position.
(3) On completion, check that the DTC is not set again.
Is the DTC set?
Go to Step 1.
The procedure is complete.