Inspection Procedure 3: Selector "P" position-linked door unlock function does not operate normally.

caution

Whenever the ECU is replaced, 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 EV-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

Malfunction of CAN bus line
Malfunction of ETACS-ECU
Damaged wiring harness and connectors

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 trouble symptom chart

STEP 2. Check the customisation function.

Check that the following other than "Disabled" is set for "Auto door unlock by selector P position" with the customisation function.

Always (P pos)

Q. Is the check result normal?

Go to Step 3.

Set the function as mentioned above other than "Disabled" for "Auto door unlock by selector P position" with the customisation function (Refer to

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

Using the M.U.T.-III, diagnose the CAN bus lines.

Q. Is the CAN bus normal?

Go to Step 4.

Correct the CAN bus line (Refer to GROUP 54C, Troubleshooting

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

Check that EV-ECU sets a diagnosis code.

Q. Is the diagnosis code set?

Diagnose EV-ECU (Refer to GROUP 54D - 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?

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 and register the ID codes (Refer to GROUP 54A, Encrypted Code Registration Criteria Table

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