Inspection Procedure 5: Interior Lamp Automatic Shutoff Function does not Work Normally.




COMMENTS ON TROUBLE SYMPTOM


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

If this function does not work normally, these input signal circuit(s) or the ETACS-ECU may have a problem. Also, "Interior lamp auto cut timer" may be set to "0min" through customisation.

PROBABLE CAUSES




DIAGNOSIS PROCEDURE


STEP 1. Customise function check


Use the ETACS-ECU customise function to check to see which of the followings other than "0min" the "Interior lamp auto cut timer" is set.

Q. Is the check result normal?

Go to Step 2.

Use the ETACS-ECU customise function to set the "Interior lamp auto cut timer" to other than "0min" (Refer to ).

STEP 2. M.U.T.-III diagnosis code


Check if diagnosis code is set to the ETACS-ECU.

Q. Is the diagnosis code set?

Troubleshoot the ETACS-ECU. Refer to .

Go to Step 3.

STEP 3. M.U.T.-III data list


Use the ETACS-ECU service data to check the signals related to the interior lamp automatic shutdown function.

Item No.
Item name
Normal condition
Item 254
IG voltage
Battery voltage
Item 288
ACC switch
OFF
Item 256
Dr door ajar switch
Open
Item 257
As door ajar switch
Open
Item 258
RR door ajar switch
Open
Item 259
RL door ajar switch
Open
OK: Normal conditions are displayed for all the items.

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. 254. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 2 "The ignition switch (IG1) signal is not received" .

Normal condition is not displayed for item No. 288. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 1 "The ignition switch (ACC) signal is not received" .

Normal condition is not displayed for item No. 256. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 5 "The front door switch (driver’s side) signal is not received" .

Normal condition is not displayed for item No. 257. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 6 "The front door switch (passenger’s side) signal is not received" .

Normal condition is not displayed for item No. 258. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 7 "The rear door switch (RH) signal is not received" .

Normal condition is not displayed for item No. 259. : Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 8 "The rear door switch (LH) signal is not received" .

STEP 4. 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 use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).

Replace the ETACS-ECU.