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.

Q. Is the diagnosis code output?

	Return to Step 1.

	The procedure is complete.