If diagnosis
code No. U1195 is set in the BSW-ECU (master), 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.
CHECK CONDITION
Ignition switch is in the ON position.
DIAGNOSTIC FUNCTION AND JUDGEMENT CRITERIA
When the BSW-ECU (master) cannot store any vehicle information data, the ECU sets diagnosis code
No. U1195.
PROBABLE CAUSES
The ETACS-ECU has not been coded yet.
Malfunction of the ETACS-ECU
Malfunction of the BSW-ECU (master)
Malfunction of the CAN bus
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III CAN bus diagnostics
Use the M.U.T.-III to diagnose the CAN bus lines.
Q.
Is the check result normal?
Go to Step 2.
Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).
STEP 2. M.U.T.-III other system diagnosis code
Check if diagnosis code No. B222C is set in the ETACS-ECU.
Q.
Is the diagnosis code set?
Code the ETACS-ECU (Refer to GROUP 00 - Precautions Before Service -
Coding List).
Go to Step 3.
STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the BSW-ECU (master).
(1)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(2)Check if diagnosis code is set.
Q.
Is the diagnosis code set?
Replace 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).