INSPECTION PROCEDURE 3: Selector "P" position-linked door unlock function does not operate <Vehicles for General Export (with keyless entry system and A/T)>.


caution Before replacing the ECU, ensure that the input and output signal circuits are normal.

OPERATION


ETACS-ECU determines whether the shift position is at "P" or not according to the shift position signal which is sent by A/T-ECU.

COMMENTS ON TROUBLE SYMPTOM


If the doors are not unlocked when the selector lever is shifted to the P position, a malfunction of the shift position signal input circuit(s) or ETACS-ECU is suspected. Also, the selector "P" position-linked door unlock function may have been "disabled" with the customisation function.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE


STEP 1. Checking central door unlocking operation


Check that the central door locking system works normally.

Q. Is the check result normal?

Go to Step 2.

Refer to Central Door Locking System Symptom Chart .

STEP 2. Check the customisation function.


Check that "Enable" is set for "Door unlock (Shift "P" position)" with the customisation function.

Q. Is the check result normal?

Go to Step 3.

Set "Enable" for "Door unlock (Shift "P" position)" with the customisation function (Refer to Customisation Function ).

STEP 3. M.U.T.-III CAN bus diagnostics


Use M.U.T.-III to diagnose the CAN bus lines.

Q. Is the CAN bus normal?

Go to Step 4.

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting ).

STEP 4. Check the M.U.T.-III Diagnosis code of other systems


Check that A/T sets a diagnosis code.

Q. Is the diagnosis code set?

Diagnose A/T (Refer to GROUP 23A - Troubleshooting ).

Go to Step 5.

STEP 5. Retest the system.


Check that shifting the selector lever to the P position unlocks the doors.

Q. Is the check result normal?

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

Replace ETACS-ECU (Refer to GROUP 54A - ETACS, ETACS-ECU ).