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Suzuki SX4 Service Manual page 1625

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Terminal
G17-1 Power supply
G17-2 Ground
G17-3 Serial communication line
G17-4 Clock line
G17-5 Illumination ring control (if equipped)
Illumination ring power supply
G17-6
(if equipped)
Reference Waveform
[A]: The transponder code read successfully at the first try.
[B]: The transponder code read successfully at the second try.
1. Serial communication line
NOTE
When ECM cannot read the transponder code at the first try, ECM tries to read the transponder code
repeatedly up to 8 times. The second waveform is the example showing that ECM read the transponder
code successfully at the second try.
Measurement terminals
Oscilloscope settings
Measurement condition
Circuit
About 12.0 V
0.0 V
0.0 V
See the reference
waveform.
0.0 V
See the reference
waveform.
0.0 V
0 V
0 V → 12 V
0 V → 12 V
About 12.0 V
CH1: G17-3 to G17-2
CH2: G17-4 to G17-2
CH1: 5 V/DIV
CH2: 5 V/DIV
TIME: 20 ms
Right after the ignition switch is turned ON, the waveform can be read.
Normal Voltage
Ignition switch at ON position
Ignition switch at OFF position
Ignition switch at OFF position
Ignition switch at OFF position
• Ignition key not inserted to the key cylinder
• Door opened
• Ignition key at OFF position
• From the time door is closed to the time
interior light faded out completely
(As the interior light fades out, the voltage
increases.)
• Door closed
• From the ignition switch is turned ON to the
time interior light is completely faded out
(As the interior light fades out, the voltage
increases.)
2. Clock line
3. First try
4. Second try
Immobilizer Control System:
Condition
10C-18
I6RW0CA30003-01

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