Inspection Procedure 5: Ignition-linked fold/unfold function does not work normally.


caution
  • Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.
  • When the ETACS-ECU of vehicles without KOS is replaced, the encrypted code of the ignition key needs to be registered to the ETACS-ECU. (If the encrypted code is not registered, the engine cannot be started. Register the encrypted code as described in GROUP 54A, Immobilizer System - How to Register Key ID )

OPERATION
The ETACS-ECU operates this function in accordance with the input signals below.

  • Ignition switch (IG1)
  • Driver’s door switch

COMMENTS ON TROUBLE SYMPTOM
If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Also, with the customise function, the door mirrors may be set to a mode in which the ignition interlock fold/unfold function is not activated.

PROBABLE CAUSES

  • Malfunction of the driver’s door switch
  • Malfunction of the ETACS-ECU
  • Damaged wiring harness and connectors

DIAGNOSTIC PROCEDURE

STEP 1. Check the ETACS customise function.
Use the ETACS customise function to confirm that "AUTO FOLD MIRROR" is set to "IG OPEN OR CLOSE".

Q. Is the check result normal?
Go to Step 2.
Use the ETACS customise function to set "AUTO FOLD MIRROR" to "IG OPEN OR CLOSE" (Refer to ).

STEP 2. M.U.T.-III data list
Check an input signal related to ignition-linked folding/unfolding function.

  • Driver’s door: open
  • Ignition switch: ON
Item No.
 Item name
 Normal conditions
Item 254
 IG voltage
 System voltage
Item 256
 Dr door ajar switch
 Open
OK: Normal conditions displayed for all the items

Q. Is the check result normal?
Normal conditions displayed for all the items : Go to Step 3.
Normal condition is not displayed for item No. 254. : Refer to GROUP 54A - ETACS, Inspection Procedure 2 "The ignition switch (IG1) signal is not received" .
Normal condition is not displayed for item No. 256. : Refer to GROUP 54A - ETACS, Inspection Procedure 5 "The front door switch (driver’s side) signal is not received" .

STEP 3. Retest the system.
Check that the ignition-liked fold/unfold function for the door mirrors works normally.

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 the ETACS-ECU.