CODE No. U1190 No receive fault detect signal

caution

If diagnosis code No. U1190 is set in the BSW-ECU (slave), always diagnose the CAN bus line.
Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.

OPERATION

The BSW-ECU (slave) communicates with the ETACS-ECU via the gateway-ECU and the BSW-ECU (master) over CAN bus lines.

DIAGNOSTIC FUNCTION AND JUDGEMENT CRITERIA

When the BSW-ECU (slave) cannot receive any fault detect signal from the ETACS-ECU within 5 seconds after the ignition switch is turned on, the ECU sets diagnosis code No. U1190.

PROBABLE CAUSES

Malfunction of the ETACS-ECU
Malfunction of the BSW-ECU (master)

DIAGNOSIS PROCEDURE

STEP 1. Check whether the BSW-ECU sets a diagnosis code.

Check whether diagnosis codes No. C2332 and/or U1109 are set in the BSW-ECU (master).

Q. Is the diagnosis code set?

YES (Only No. C2332 is set or both codes are set) : Follow diagnosis code procedure No. C2332 for the BSW-ECU (master) (Refer to

).

YES (Only No. U1190 is set) : Follow diagnosis code procedure No. U1190 for the BSW-ECU (master) (Refer to

Go to Step 2

STEP 2. Check whether the diagnosis code is set again.

Check again if the diagnosis code is set in the BSW-ECU (slave).

(1)Erase the diagnosis code.

(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace the BSW-ECU (slave). Then Go to Step 3

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction).

STEP 3. Check whether the diagnosis code is set again.

Check again if the diagnosis code is set in the BSW-ECU (slave).

(1)Erase the diagnosis code.

(2)Turn the ignition switch from the LOCK (OFF) position to the ON position.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Use the BSW-ECU (slave), which has been removed at step 2, as the BSW-ECU (master).

Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to cope with Intermittent Malfunction).