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DTC U1190: No receive fault detect signal
 
 
caution
  • If DTC No. U1190 is set, be sure to diagnose the CAN bus line.
  • Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.
 
 
DIAGNOSTIC FUNCTION
DTC No. U1190 will be set when the EV remote-ECU can receive no signals, which enable or disable DTC (U code) to be detected, from the ETACS-ECU.
 
 
DTC SET CONDITION
  • The CAN bus line may be defective
  • The ETACS-ECU may be defective
  • The EV remote-ECU may be defective
 
 
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 off the power supply mode of the electric motor switch 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) Press the electric motor switch to turn on the power supply mode.
(3) Diagnose the CAN bus line.
(4) Press the electric motor switch to turn off the power supply mode.
Is the CAN bus line found to be normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
 
STEP 2. Using scan tool (M.U.T.-IIISE), read the ETACS DTC.
Check if DTC is set in the ETACS-ECU.
Is the DTC set?
Diagnose the ETACS-ECU (Refer to ). On completion, go to Step 5.
Go to Step 3.
 
STEP 3. Using scan tool (M.U.T.-IIISE), read the other system DTC.
Check if DTC is set in the combination meter.
  • DTC No. U1190: No receive fault detect signal
Is the DTC set?
Replace the ETACS-ECU (Refer to ).
Go to Step 4.
 
STEP 4. Recheck for DTC.
Check again if the DTC is set in the EV remote-ECU.
(1) Erase the DTC.
(2) Press the electric motor switch to turn the power supply mode from "OFF" to "ON."
(3) Check if DTC is set.
Is the DTC set?
Replace the EV remote-ECU (Refer to ), and then go to Step 5.
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).
 
STEP 5. Recheck for DTC.
Check again if the DTC is set in the EV remote-ECU.
(1) Erase the DTC.
(2) Press the electric motor switch to turn the power supply mode from "OFF" to "ON."
(3) Check if the DTC is set.
Is DTC No.U1190 set?
Return to Step 1.
This diagnosis is complete.