A/C System Inspection At Ecm; Repair Instructions; Operation Procedure For Refrigerant Charge - Suzuki SX4 Service Manual

7B-76 Air Conditioning System: Automatic Type
Reference waveform No. 1
Rear defogger switch or A/C switch signal (1)
Measurement terminal
Oscilloscope setting
Measurement condition Rear defogger switch:

Operation Procedure for Refrigerant Charge

Refer to "Operation Procedure for Refrigerant Charge: Manual Type".
Rear defogger switch
CH1: "G20-4" to "G20-23" A/
C switch
CH1: "G20-21" to "G20-23"
CH1: 5 V / DIV
TIME: 10 ms / DIV
• 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

Repair Instructions

Reference waveform No. 2
Serial communication line of BCM (1)
Measurement terminal
Oscilloscope setting
Measurement condition Ignition switch is at ON

A/C System Inspection at ECM

When checking voltage at ECM terminals related to A/C
system, refer to "Inspection of ECM and Its Circuits in
Section 1A".
CH1: "G20-13" to "G20-23"
CH1: 5 V / DIV
TIME: 20 ms / DIV
position
I7RW01722015-02
S7RW0A7224030
S7RW0A7226001