Suzuki 2006 SX4, Service Manual

Page: 1261 / 1478

Lighting Systems: 9B-17
Inspection of Headlight Leveling Control Module and Its Circuit (Headlight Auto Leveling System)
S6RW0C9204023
Headlight auto leveling control module and its circuits can be checked at headlight auto leveling control module wiring
couplers by measuring voltage and pulse signal.
CAUTION
!
Headlight auto leveling control module cannot be checked by itself. It is strictly prohibited to connect
voltmeter or ohmmeter to headlight auto leveling control module with couplers disconnected from it.
Voltage Check
Check voltage between each terminal of headlight auto leveling control module and vehicle body ground under each
condition. If measured voltage is out of standard value, check circuit (including switch and sensor) of terminal where
voltage was measured.
NOTE
• As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when
ignition switch is ON.
• Voltage with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with
oscilloscope if necessary.
2 Headlight control signal
0 V
Lighting switch at “AUTO”
position, headlight at ON.
10 – 14 V
Ignition switch is at ON
position, lighting switch at
“OFF” position.
3
Power supply for auto-on
headlight sensor
About 5 V
Ignition switch is at OFF
position.
4
Auto-on headlight sensor
signal
3 – 4.5 V
Light the sensor lens with
incandescent lamp 100 W
Less than 1 V
Cover the sensor lens with
hand.
5
Ground for auto-on headlight
controller
0 V —
6
Ground for auto-on headlight
sensor
0 V —
7 Lighting switch signal
0 V
Ignition switch is at ON
position, lighting switch at
“AUTO” position.
1.0 – 5.0 V
Ignition switch is at ON
position, lighting switch at other
than “AUTO” position.
8 Ignition switch signal 10 – 14 V
Ignition switch is at ON
position.
Terminal Circuit Specification Condition
V
10 11 12 13 16 17 18 19 20
3 1 5 6 9
21 22 23 24
[A]
I6RW0C920012-01
[A]: Headlight leveling control module connector (viewed from harness side)