Suzuki 2006 SX4, Service Manual

Page: 944 / 1478

7B-79 Air Conditioning System: Automatic Type
Reference waveform No. 1
Rear defogger switch or A/C switch signal (1)
Reference waveform No. 2
Serial communication line of BCM (1)
A/C System Inspection at ECM
S6RW0C7224030
When checking voltage at ECM terminals related to A/C
system, refer to “Inspection of ECM and Its Circuits in
Section 1A”.
Measurement terminal Rear defogger switch
CH1: “G20-4” to “G20-23” A/
C switch
CH1: “G20-21” to “G20-23”
Oscilloscope setting CH1: 5 V / DIV
TIME: 10 ms / DIV
Measurement condition Rear defogger switch:
• Ignition switch is at ON
position and rear defogger
switch is not pushed
A/C switch:
• Ignition switch is at ON
position and A/C switch is
not pushed
I7RW01722014-02
Measurement terminal CH1: “G20-13” to “G20-23”
Oscilloscope setting CH1: 5 V / DIV
TIME: 20 ms / DIV
Measurement condition Ignition switch is at ON
position
I7RW01722015-02