Suzuki GRAND VITARA Owner's Manual page 1147

Step
3 Position sensor power supply circuit check
1) Disconnect air intake control actuator connector with
ignition switch turned OFF.
2) Measure voltage between "RED/WHT" wire terminal of
temperature control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?
4 Position sensor power supply circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Check for proper connection to HVAC control module
connector at "G52-14", "G52-13" and "G52-23"
terminals.
3) If OK, measure resistance between "RED/WHT" wire
terminal of air flow control actuator connector and "G52-
14" terminal of HVAC control module connector.
Is resistance below 5
5 Position sensor power supply circuit check
1) Measure resistance between "RED/WHT" wire terminal
of air flow control actuator connector and vehicle body
ground.
Is resistance infinity?
6 Position sensor power supply circuit check
1) Measure voltage between "RED/WHT" wire terminal of
air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 0 V?
7 Position sensor signal circuit check
1) Connect HVAC control module connector with ignition
switch turned OFF.
2) Measure voltage between "WHT/BLU" wire terminal of
air flow control actuator connector and vehicle body
ground with ignition switch turned ON.
Is voltage 4 – 6 V?
8 Position sensor signal circuit check
1) Disconnect connector from HVAC control module with
ignition switch turned OFF.
2) Measure resistance between "WHT/BLU" wire terminal
of air flow control actuator connector and "G52-23"
terminal of HVAC control module connector.
Is resistance below 5
9 Position sensor signal circuit check
1) Measure resistance between "WHT/BLU" wire terminal
of air flow control actuator connector and vehicle body
ground.
Is resistance infinity?
Action
Ω
?
Ω
?
Air Conditioning System:
Yes
Air intake control
actuator faulty.
Go to Step 5.
Go to Step 6.
Go to Step 7.
Go to Step 11.
Go to Step 9.
Go to Step 10.
7B-38
No
Go to Step 4.
"RED/WHT" wire open
or high resistance
circuit.
"RED/WHT" wire
shorted to ground
circuit.
"RED/WHT" wire
shorted to other circuit.
Go to Step 8.
"WHT/BLU" wire open
or high resistance
circuit.
"WHT/BLU" wire
shorted to ground
circuit.