Inspection Procedure O-6: Interior lamp automatic shutoff function does not work normally. <Vehicles with keyless entry system>


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


COMMENTS ON TROUBLE SYMPTOM
The ETACS-ECU operates the interior lamp automatic-shutdown function in accordance with the input signals below.

  • Ignition switch (ACC)
  • Ignition switch (IG1)
  • Driver’s door switch
  • Tailgate switch
  • All of the door switches
  • Interior lamp loaded signal
If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may be defective. Note that this function can be disabled/enabled by the adjustment function (default setting; enabled).

POSSIBLE CAUSES

  • Malfunction of the door switches
  • Malfunction of the tailgate switch
  • Malfunction of the interior lamp
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE

Step 1. Customize function by using the SWS monitor.
Check that the interior lamp automatic-shutdown function has been enabled by using the SWS monitor customize function.

Q. Is the check result normal?
Go to Step 2.
Enable the interior lamp automatic-shutdown function by using the SWS monitor customize function (Refer to ).

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
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 input signals below, which are related to the interior lamp automatic-shutdown function.
<Selected item> ETACS ECU
  • Ignition switch: OFF
  • Driver’s door: open
Item No.
 Item name
 Normal condition
Item 30
 IG SW(IG1)
 OFF
Item 31
 IG SW(ACC)
 OFF
Item 32
 DR DOOR SW
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?
Normal conditions are displayed for all the items. : Go to Step 4.
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.31. : Refer to inspection procedure P-1 "The ignition switch (ACC) 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 signals related to the operation of the interior lamp automatic-shutdown function.

  • Passenger’s door: Close → Open
Item No.
 Item name
 Normal condition
Item 05
 PASS DOOR SW
 from OFF to ON

  • Tailgate: Close → Open
Item No.
 Item name
 Normal condition
Item 07
 TRK LID LA SW
 from OFF to ON

  • Rear door (RH): Close → Open
Item No.
 Item name
 Normal condition
Item 41
 R.DOOR(RH) SW
 from OFF to ON

  • Rear door (LH): Close → Open
Item No.
 Item name
 Normal condition
Item 42
 R.DOOR(LH) SW
 from OFF to ON
OK: Normal conditions are displayed for all the items.

Q. Are the check result normal?
Go to Step 5.
Refer to inspection procedure P-12 "All the door switch signals are not received ."

Step 5. Pulse check
Check the input signals below, which are related to the room lamp automatic-shutdown function.
System switch
 Check condition
Interior lamp loaded signal
 When a load is applied through multi-purpose fuse No.18
OK: The M.U.T.-III sounds or the voltmeter needle fluctuates.

Q. Is the check result normal?
Go to Step 6.
Refer to inspection procedure P-22 "The interior lamp loaded signal is not detected ."

Step 6. Retest the system.
Check that the interior lamp automatic-shutdown function 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.