Suzuki SX4 Service Manual page 1644

10E-17 Keyless Start System:
Voltage Check
1) Disconnect negative cable (–) at battery.
2) Remove keyless start control module from vehicle body referring to "Keyless Start Control Module Removal and
Installation".
3) Connect connector to keyless start control module.
4) Check voltage at each terminal number of couplers connected.
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.
Terminal
Number
G16-1 Driver side door antenna (–)
G16-2 Driver side door antenna (+)
G16-3 Rear end door / trunk lid antenna (–)
G16-4 Rear end door / trunk lid antenna (+)
G16-5 Center antenna (–)
G16-6 Center antenna (+)
G16-7 Luggage room / trunk room antenna (–)
G16-8 Luggage room / trunk room antenna (+)
G16-9 Ground for keyless start control module
G16-10 Power source
G16-11 Ignition switch (ACC signal)
G16-12
G16-13
G16-14 Ignition switch (key reminder signal)
G16-15 Ignition switch (ON signal)
G16-16 Driver side door request switch
G16-17
[A]
20 19 18 16 15 14 11
37 36 34 33 32 31 30 29
[A]: Keyless start control module connector (viewed from harness side)
Circuit
—
—
—
10 9 8 7 6 5 4 3 2 1
24 23
Normal
Voltage
*0 – 5 V Refer to "Reference waveform No. 1: "
*0 – 5 V Refer to "Reference waveform No. 1: "
*–2 – 2 V
Refer to "Reference waveform No. 2: "
*–10 – 15 V
*–10 – 10 V
Refer to "Reference waveform No. 3: "
*–8 – 14 V
0 – 1 V Ignition switch is at all positions
10 – 12 V Ignition switch is at all positions
10 – 12 V Ignition switch is at ACC or ON position
Ignition switch is at any position other than
0 – 1 V
ACC or ON position
—
—
10 – 12 V Insert ignition key to ignition key cylinder
0 – 1 V Pull out ignition key from ignition key cylinder
10 – 12 V Ignition switch is at ON position
Ignition switch is at any position other than ON
0 – 1 V
position
10 – 12 V Request switch of driver side door is released
0 – 1 V Request switch of driver side door is pushed
—
I5RW0AA50008-03
Condition
—
—
—