Inspection Of Hvac Control Module And Its Circuit - Suzuki Swift Sport 2004 Service & Repair Manual

Inspection of HVAC Control Module and Its Circuit

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".
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.
1. HVAC control module
Terminal Wire Color
Air flow control actuator
G51-1 BRN/WHT
(DEF)
Air flow control actuator
G51-2 BRN/YEL
(FACE)
Temperature control
G51-3 GRY/BLU
actuator (COOL)
Temperature control
G51-4 GRY/RED
actuator (HOT)
Serial communication line
G51-5 PPL/WHT
of data link connector
G51-6 —
Serial communication line
G51-7 YEL
of BCM
1
2. HVAC control module connector (viewed from harness side)
Normal
Circuit
Voltage
10 – 14 V
0 – 1 V
10 – 14 V
0 – 1 V
10 – 14 V
0 – 1 V
10 – 14 V
0 – 1 V
10 – 14 V Ignition switch turned ON
— —
Refer to "Inspection of BCM and its Circuits in Section 10B"
Air Conditioning System: Automatic Type 7B-67
2
G52
8 7 6 5 4 3 2 1 10
16 15 14 13 12 11 10 9 20
Ignition switch turned ON, air flow control actuator is
working in operation from VENT to DEF position
Ignition switch turned ON, except the above condition
Ignition switch turned ON, air flow control actuator is
working in operation from DEF to VENT position
Ignition switch turned ON, except the above condition
Ignition switch turned ON, temperature control
actuator is working in operation from HOT to COOL
position
Ignition switch turned ON, except the above condition
Ignition switch turned ON, temperature control
actuator is working in operation from COOL to HOT
position
Ignition switch turned ON, except the above condition
S7RS0B7224026
G51
9 8 7 6 5 4 3 2 1
19 18 17 16 15 14 13 12 11
I5RS0A722017-02
Condition
—