Code No.U1190:
Can’t receive fault detection control signal
DIAGNOSIS CODE SET CONDITIONS
To each ECU connected to the CAN bus line, ETACS-ECU sends the diagnosis code (U code) detection
permission or prohibition signal. When A/T-ECU cannot receive the diagnosis code (U code)
detection permission or prohibition signal for 5 seconds, diagnosis code No. U1190 is stored.
PROBABLE CAUSES
Malfunction of the ETACS-ECU
Malfunction of the CAN bus
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Using M.U.T.-III, perform CAN busline diagnosis.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN busline (Refer to GROUP54C, Diagnosis -
Can Bus Diagnostic
Chart ), and then go to Step 3.
STEP 2. M.U.T.-III diagnosis code
Reconfirm whether the diagnosis codes are output from A/T-ECU.
(1)Erase the diagnosis codes being output.
(2)Ignition switch: LOCK (OFF) to ON
(3)Confirm whether the diagnosis codes are output.
Q.
Is the diagnosis code output?
Replace the ETACS-ECU, and then go to Step 3.
The procedure is complete.
STEP 3. M.U.T.-III diagnosis code
Reconfirm whether the diagnosis codes are output from A/T-ECU.
(1)Erase the diagnosis codes being output.
(2)Ignition switch: LOCK (OFF) to ON
(3)Confirm whether the diagnosis codes are output.