SWS – TROUBLESHOOTING
54B-91
Is the interior light automatic cut-off function set to
“Function ON”?
SWS monitor ECU check
• Ignition switch: OFF
ETACS-ECU
OK: “OK” is displayed
SWS monitor service data
(Communications data) ETACS-ECU
• Ignition switch: OFF
• Driver’s door: Open (but closed when checking Item
No.38)
• All doors: Open (but closed when checking Item No.32)
Item No.
Item Name
Normal state
(a) 31
Ignition switch (ACC)
OFF
(a) 30
Ignition switch (IG1)
OFF
(b) 32
Driver’s door SW
ON
(c) 38
Security alarm
ON
OK: Normal state displayed for all
MUT-II/III pulse check
Generic fuse No.17
OK MUT-II/III buzzer sounds once
Confirm the trouble symptoms
Replace the ETACS-ECU
Use the adjustment function to set the interior light
automatic cut-off function to “Function ON” (p.54B-118)
To Inspection procedure A-3 No communication with
ETACS-ECU (p.54B-28)
To Inspection procedure R-1 Ignition switch (ACC) signal
not input (p.54B-96)
To Inspection procedure R-2 Ignition switch (IG1) signal not
input (p.54B-96)
To Inspection procedure R-4 Driver’s door switch signal
not input (p.54B-98)
To Inspection procedure R-14 All door switch signals not
input (except driver’s door) (p.54B-106)
To Inspection procedure R-19 Generic fuse No.17 load
use signal not detected (p.54B-111)
Inspection procedure N-2
Note:
If only one of the interior lights will not switch off (front interior light, rear interior light (vehicle not fitted with sunroof), boot
interior light, door ajar indicator light, ignition key cylinder illumination light), then check the bulb, and the harnesses between
the ETACS-ECU and the light, and the light and the body earth.
Interior light automatic cut-off function not working correctly (cars
fitted with keyless entry system)
Probable Cause
The interior light automatic cut-off function is operated by determining
the following input signals in the ETACS-ECU.
• Ignition switch (IG1)
• Ignition switch (ACC)
• Driver’s door switch
• All door switch
• Generic fuse No. 17
If the lights do not work correctly, then there is probably a problem in the
input circuit system for these signals, or a fault in the ETACS-ECU.
There is also a possibility that the interior light automatic cut-off function
has been switched off by the adjustment function.
• Fault in all door switch
• Fault in interior light switch
• Fault in ETACS-ECU
• Fault in harness or connectors
YES
OK
OK
OK
OK
NO
NG
NG (a)
NG (b)
NG (c)
NG (d)
NG