INSPECTION PROCEDURE J-1: The ignition key cylinder illumination lamp does not illuminate/extinguish normally.


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


COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates this function in accordance with the input signals below.
<Vehicles without keyless entry system>
  • Ignition switch (IG1)
  • Driver’s door switch
<Vehicles with keyless entry system>
  • Ignition switch (IG1)
  • Key reminder switch
  • Driver’s door switch
  • Interior lamp loaded signal
If this function does not work normally, these input signal circuit(s), the ignition key cylinder illumination lamp or the ETACS-ECU may be defective.

POSSIBLE CAUSES

  • Malfunction of the key reminder switch
  • Malfunction of the driver’s door switch
  • Malfunction of the ignition key cylinder illumination lamp
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Check the operation of the interior lamp.
Check that the interior lamps illuminate and extinguish normally.

Q. Is the check result normal?
Go to Step 2.
Refer to inspection procedure O-1 "The interior lamps (room ramp, rear parsonal lamps, door lamps, luggage compartment lamp, key illumination lamp) does not illuminate or extinguish normally ."

Step 2. ECU check by using the SWS monitor.
Check that the power supply and earth lines to the ETACS-ECU and the SWS communication lines are normal.

  • Ignition switch: OFF
ECU TO BE CHECKED
  • ETACS ECU
OK: "OK" is displayed on the "ETACS ECU" menu.

Q. Is the check result normal?
Go to Step 3.
Refer to Inspection Procedure A-3 "Communication with ETACS-ECU is not possible ."

Step 3. SWS monitor data list
Check the SWS communication signal, which are related to the ignition key cylinder illumination lamp.
<Selected item> ETACS ECU
  • Ignition switch: OFF
  • Driver’s door: open
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 OFF
Item 32
 DR DOOR SW
 ON
OK: Normal conditions are displayed for all the items

Q. Are the check result normal?
Normal conditions are displayed for all the items. <Vehicles without keyless entry system> : Go to Step 4.
Normal conditions are displayed for all the items. <Vehicles with keyless entry system> : Go to Step 5.
Normal condition is not displayed for item No.30. : Refer to inspection procedure P-2 "The ignition switch (IG1) signal is not received ."
Normal condition is not displayed for item No.32. : Refer to inspection procedure P-5 "The driver’s door switch signal is not received <LH drive vehicles> or <RH drive vehicles>."

Step 4. ETACS switch data by using the SWS monitor
Check the ETACS-ECU communication signal, which is related to the ignition key cylinder illumination lamp.

  • Ignition switch: OFF (key inserted)
Item No.
 Item name
 Normal condition
Item 03
 KEY REMIN SW
 OFF
OK: Normal condition is displayed.

Q. Is the check result normal?
Go to Step 5.
Refer to inspection procedure P-10 "The key reminder switch signal is not received ."

Step 5. Connector check: C-308 key reminder switch connector.


Q. Is the check result normal?

Go to Step 6.

Repair the defective connector.

Step 6. Check the bulb of the ignition key cylinder illumination lamp.
Check the bulb of the ignition key cylinder illumination lamp.

Q. Is the check result normal?
Go to Step 7.
Replace the bulb of the ignition key cylinder illumination lamp.

Step 7. Connector check: C-221 ETACS-ECU connector.


Q. Is the check result normal?

Go to Step 8.

Repair the defective connector.

Step 8. Check the wiring harness from C-221 ETACS-ECU connector terminal Nos. 69 and 71 to C-308 key cylinder illumination lamp connector terminal Nos. 1 and 2.





  • Check the input and output lines for open circuit.

Q. Is the check result normal?

Go to Step 9.

Repair the wiring harness.

Step 9. Retest the system.
Check that the ignition key cylinder illumination lamp illuminates/extinguishes 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.