INSPECTION PROCEDURE E-5: Multimode keyless entry system function does not work at all.


caution Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

COMMENTS ON TROUBLE SYMPTOM
If the electric-folding door mirrors work normally, the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the ETACS-ECU
  • Malfunction of the keyless entry transmitter

DIAGNOSTIC PROCEDURE

Step 1. Check the operation of the electric folding outside rear-view mirrors.
Check that the electric folding outside rear-view mirrors operate normally by using the remote controlled mirror switch (folding/unfolding switch).

Q. Is the check result normal?
Go to Step 2.
Refer to inspection procedure I-1 "Electric retractable remote controlled door mirror does not work at all ."

Step 2. Check the keyless entry transmitter.
Check that the keyless entry system works normally.

Q. Is the check result normal?
Go to Step 3.
Refer to inspection procedure E-1 "Keyless entry system does not work ."

Step 3. Check the power supply circuit.
When the ignition switch is turned to the LOCK (OFF) position, check if the hazard warning lamps illuminate.

Q. Is the check result normal?
Go to Step 4.
Refer to inspection procedure A-2 "Check the ETACS-ECU battery power supply circuit ."

Step 4. Pulse check
Check the input signals which are related to the multimode keyless entry system.
System switch
 Check conditions
Keyless entry transmitter switch
 When the switch is turned from off to on
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 5.
Refer to inspection procedure P-21 "Each switch signal of the keyless entry transmitter is not received ."

Step 5. Retest the system.
Check that the multimode keyless entry system works normally.

Q. Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
Replace the ETACS-ECU.