Inspection Procedure 6: The front door switch (passenger’s side) signal is not received.



caution Before replacing the ECU, ensure that the power supply circuit, the earth circuit and the communication circuit are normal.










COMMENTS ON TROUBLE SYMPTOM


If there is an error to the front door switch (passenger’s side) input signal, the front door switch (passenger’s side) signal is no longer output to the communication line.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Check the installation condition.


Check that the front door switch (passenger’s side) is installed to the body correctly.

Q. Is the check result normal?

Go to Step 2.
Correct the installation condition.

STEP 2. Connector check: D-35 front door switch (passenger’s side) connector


Q. Is the check result normal?

Go to Step 3.
Repair the defective connector.

STEP 3. Front door switch (passenger’s side) check


Refer to GROUP 42 - Door .

Q. Is the check result normal?

Go to Step 4.
Replace the front door switch (passenger’s side).

STEP 4. Connector check: C-313 ETACS-ECU connector


Q. Is the check result normal?

Go to Step 5.
Repair the defective connector.

STEP 5. Wiring harness check between the D-35 front door switch (passenger’s side) connector terminal No. 3 and the C-313 ETACS-ECU connector terminal No. 12


Check the input lines for open circuit and short circuit.

Q. Is the check result normal?

Go to Step 6.
Repair the wiring harness.

STEP 6. M.U.T.-III data list



    Open the front passenger’s door.
Item No.
Item name
Normal condition
Item 257
As door ajar switch
Open
OK: Normal condition is displayed.

Q. Is the check result normal?

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.