Inspection Procedure 20

Inspection Procedure 20: Power door locks with selective unlocking does not work.

CAUTION:
Before replacing the ECU, ensure that the power supply circuit, the ground circuit and the communication circuit are normal.

COMMENT ON TROUBLE SYMPTOM

When the keyless entry function and door entry function operate normally, but there is an error to only the power door locks with selective unlocking, ETACS-ECU may have a problem.
In addition, it is possible that the function has been set to "all doors unlock" by the customization function.

PROBABLE CAUSES

- Malfunction of ETACS-ECU

- Damaged wiring harness and connectors

DIAGNOSIS

STEP 1. Check the customization

Q. Are the power door locks with selective unlocking enabled by the customization function?

YES Go to Step 2
NO Set the power door locks with selective unlocking to "Enabled" by using the customization function.
Refer to Configuration Function.
STEP 2. Power door locks with selective unlocking operation check

Check that the power door locks with selective unlocking operate normally by means of the keyless entry function or door entry function.

Q. Is the check result normal?

YES Go to Step 5
NO (Does not work by means of keyless entry function) : Go to Step 3
NO (Does not work by means of door entry function) : Go to Step 4
NO (Does not work by means of either functions) : Go to Step 5
STEP 3. Keyless entry system operation check

Press the unlock switch of the keyless operation key and check that only the driver's door is unlocked. Then, press the unlock switch once again within 2 seconds after that to check that the front passenger's door, rear doors, and liftgate [LANCER SPORTBACK] are unlocked.

Q. Does the keyless entry function work normally?

YES Go to Step 5
NO (Only the driver's door is not unlocked.) : Replace ETACS-ECU.
NO (The driver's door, front passenger's door, rear doors, and tailgate are not unlocked.) : Refer to Inspection Procedure 15: "Keyless entry function does not work Inspection Procedure 15."
STEP 4. Door entry function operation check

Press the lock/unlock switch (driver's side) and check that only the driver's door is unlocked. Then, press the lock/unlock switch (driver's side) once again within 2 seconds after that to check that the front passenger's door, rear doors, and liftgate [LANCER SPORTBACK] are unlocked.

Q. Does the door entry function work normally?

YES Go to Step 5
NO (Only the driver's door is not unlocked.) : Replace ETACS-ECU.
NO (The driver's door, front passenger's door, rear doors, and tailgate are not unlocked.) : Refer to Inspection Procedure 9: "Driver's door lock/unlock switch does not work Inspection Procedure 9."
STEP 5. Check of the troubles

Check that the power door locks with selective unlocking works normally.

Q. Is the check result normal?

YES Intermittent malfunction How to Cope With Intermittent Malfunctions).
NO Replace ETACS-ECU.