Suzuki Grand Vitara JB416 / JB420. Manual — part 369
9B-15 Lighting Systems:
Inspection of Headlight Leveling Control Module and Its Circuit (Vehicle Equipped With Auto
Leveling Headlight System)
S5JB0A9204021
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.
V
10
11
12
13
16
17
18
19
20
3
1
5
6
9
21
22
23
24
[A]
I5JB0A920014-02
[A]: Headlight leveling control module connector (viewed from harness side)
Terminal
Circuit
Specification
Condition
1
Power source
10 – 14 V
Ignition switch is at ON position.
2
—
—
—
3
Lighting switch
Less than 1.5 V
Lighting switch is at “HEAD”
position.
10 – 14 V
Lighting switch is at OFF position.
4
—
—
—
5
—
—
—
6
Headlight auto leveling indicator
Continuity
For about 3 seconds after ignition
switch is turned on (i.e., headlight
auto leveling indicator is lit up).
No continuity
More than about 3 seconds after
ignition switch is turned on (i.e.,
headlight auto leveling indicator is
not lit up).
7
—
—
—
8
—
—
—
9
Ground for headlight auto leveling
control unit
0 V
Ignition switch is at ON position.
10
Power supply for right headlight
leveling actuator
10 – 14 V
Ignition switch is at ON position.
11
Power supply for left headlight
leveling actuator
10 – 14 V
Ignition switch is at ON position.
Lighting Systems: 9B-16
Reference waveform No.1
Vehicle speed signal (1).
Vehicle speed signal is pulse. Pulse frequency varies depending on vehicle speed.
12
Power supply for rear height
sensor
About 5 V
Ignition switch is at ON position.
13
Power supply for front height
sensor
About 5 V
Ignition switch is at ON position.
14
—
—
—
15
—
—
—
16
Vehicle speed signal
Refer to “Reference waveform No.1: ”.
17
Signal for right headlight leveling
actuator
Less than 1 V
Lighting switch is at OFF position.
1.0 – 12.6 V
For 10 seconds after turning
lighting switch to ON position.
18
Signal for left headlight leveling
actuator
Less than 1 V
Lighting switch is at OFF position.
1.0 – 12.6 V
For 10 seconds after turning
lighting switch to ON position.
19
Input signal for rear height sensor
About 2.5 V
Ignition switch is at ON position.
20
Input signal for front height sensor
About 2.5 V
Ignition switch is at ON position.
21
Ground for rear height sensor
0 V
Ignition switch is at ON position.
22
Ground for front height sensor
0 V
Ignition switch is at ON position.
23
Ground for right headlight leveling
actuator
0 V
Ignition switch is at ON position.
24
Ground for left headlight leveling
actuator
0 V
Ignition switch is at ON position.
Terminal
Circuit
Specification
Condition
Measurement terminal
CH 1: “G51-16” to “G51-9”
Oscilloscope setting
CH 1: 200 mV
TIME: 40.0 ms/DIV
Measurement condition
Engine is running and vehicle speed 10 km/h (6 mph)
I5JB0A920037-01
9B-17 Lighting Systems:
Repair Instructions
Headlight Housing Removal and Installation
S5JB0A9206001
WARNING
!
Be sure to read “Precautions for Discharge
Headlight Service (If Equipped)” before
starting to service work.
Neglecting them may result in personal
injury.
Removal
1) Disconnect negative (–) cable at battery.
2) Remove front bumper. Refer to “Front Bumper
3) Remove headlight mounting bolts.
4) Detach headlight housing (1) from vehicle.
5) Disconnect couplers from headlight housing (1).
Installation
Reverse removal procedure noting the following.
• After installation, be sure to inspect and adjust aiming
referring to “Headlight Aiming Adjustment with
Screen”.
Headlight Bulb Replacement
S5JB0A9206002
WARNING
!
• To avoid danger of being burned, don’t
touch when the bulb is hot.
• Don’t touch glass surface of bulb, to avoid
deteriorate as the case may be unclear
when bulb light on at dirty condition.
• Be sure to read “Precautions for Discharge
Headlight Service (If Equipped)” before
starting to service work.
Discharge headlight Bulb
1) Check to ensure that lighting switch is at OFF
position.
2) Disconnect negative (–) cable at battery.
3) Remove headlight housing referring to “Headlight
Housing Removal and Installation”.
4) Remove cover (1) from headlight housing by turning
it counterclockwise.
5) Remove igniter (2) from discharge headlight bulb by
turning it counterclockwise.
6) Replace bulb (1) from headlight housing.
7) Install igniter (2) to discharge headlight bulb by
turning it clockwise.
8) Install cover to headlight housing by turning it
clockwise.
9) Install headlight housing to vehicle body referring to
“Headlight Housing Removal and Installation”.
10) Connect negative (–) cable at battery.
11) After installation, be sure to inspect and adjust
aiming referring to “Headlight Aiming Adjustment
with Screen”.
1
I5JB0A920015-01
1
2
I5JB0A920016-01
1
iii)
ii)
ii)
i)
i)
I5JB0A920017-01
Lighting Systems: 9B-18
Other Than Discharge Headlight Bulb
1) Disconnect negative cable at battery.
2) Disconnect headlight coupler.
3) Remove socket cover (if equipped).
4) Remove headlight bulb (1) as shown.
5) Install new headlight bulb and assemble all removed
parts.
Ballast Removal and Installation
S5JB0A9206023
WARNING
!
Be sure to read “Precautions for Discharge
Headlight Service (If Equipped)” carefully
before working. Neglecting them may result
in personal injury.
Removal
1) Check to ensure that lighting switch is at OFF
position.
2) Disconnect negative (–) cable at battery.
3) Remove headlight housing referring to “Headlight
Housing Removal and Installation”.
4) Remove ballast (1) from headlight housing (2).
5) Disconnect connector (3) from ballast.
Installation
Reverse removal procedure noting the following.
• Connect connectors securely.
• After installation, be sure to inspect and adjust aiming
referring to “Headlight Aiming Adjustment with
Screen”.
[A]: Low beam bulb of headlight in which low and high beam bulbs are
separated (bulb lock type)
[B]: Low beam bulb of headlight in which low and high beam bulbs are
separated (socket lock type)
[C]: High beam bulb of headlight in which low and high beam bulbs are
separated
[D]: Bulb in which low and high beams are integrated
2. Headlight bulb socket
iii)
ii)
i)
1
iii)
ii)
i)
1
ii)
i)
[A]
[B]
[C]
[D]
ii)
i)
iii)
ii)
1
2
1
2
iv)
i)
iv)
iii)
I5JB0D920017-01
1
2
3
I5JB0A920019-01
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