Suzuki Liana RH413, Service Manual

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Air Conditioning System: Manual Type 7B-14
Visual Inspection
S3RH0A7214018
Check visually the following parts and systems.
Inspection of HVAC Control Module and its Circuit
S3RH0A7214019
HVAC control module and its circuits can be checked at HVAC control module wiring couplers by measuring voltage.
CAUTION
!
HVAC control module can not be checked by itself. It is strictly prohibited to connect voltmeter to
HVAC control module with couplers disconnected from it.
Voltage Check
1) Remove HVAC control module referring to “HVAC Control Module Removal and Installation in Section 7A”.
2) Check voltage at each terminal.
NOTE
As each terminal voltage is affected by the battery voltage, confirm that it is 11 V or more when ignition
switch is ON.
Inspection item Correction
• Refrigerant ---- leakage and amount Refer to “Quick Checking of Refrigerant
Charge”.
• A/C pipe or hose ---- disconnection, looseness and deterioration
• A/C compressor drive belt ---- looseness and damage
Refer to “Compressor Drive Belt Inspection”.
• Battery ---- fluid level and corrosion of terminal
• Connectors of electric wire harness ---- disconnection and friction
• Fuses ---- burning
• Parts ---- installation and damage
• Other parts that can be checked visually
1
2
2 1 4 3 6 5
10 11 12 13 14
30 28 27 26 25 24 23 22 21 20 19 18 17 16 15 29
9 8 7
I3RH0A721004-01
1. HVAC control module 2. HVAC control module connector “G77” (viewed from harness side)
Terminal Wire Color Circuit
Normal
Voltage
Condition
G77-1 GRN/WHT A/C signal
6.0 – 14.0 V A/C switch OFF
0 – 1.5 V A/C switch ON
G77-2 BLU/BLK
Electric load signal for
blower motor
10.0 – 14.0 V
Ignition switch ON, Blower speed selector OFF, 1st or
2nd position
about 2.0 V
Ignition switch ON, Blower speed selector between
3rd and HIGH position
G77-3 PPL/WHT Rear defogger relay
10.0 – 14.0 V Rear defogger switch OFF
0 – 0.5 V Rear defogger switch ON
G77-4 — — — —
G77-5 BLU/YEL Blower motor controller
about 0.0 V
Ignition switch ON, Blower speed selector OFF
position
2.0 – 3.0 V
Ignition switch ON, Blower speed selector between
LOW and HIGH position