Suzuki SX4 Service Manual page 254

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1A-204 Engine General Information and Diagnosis:
Troubleshooting
Step
1
Check A/C condenser fan control system
Is A/C condenser fan started when A/C is operating?
2
Check A/C condenser fan relay and its circuit
1) Connect scan tool to DLC with ignition switch OFF.
2) Check pending DTC and DTC with scan tool.
Is DTC P0481 displayed?
3
Check A/C refrigerant
1) Check amount of A/C refrigerant referring to "A/C
System Performance Inspection: Manual Type in
Section 7B".
Is it good condition?
4
Check wire circuit
1) Disconnect A/C condenser cooling fan control relay from
individual circuit fuse box No.1 with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and "BLU/YEL" wire terminal of A/C
condenser cooling fan control relay connector.
Is voltage 10 – 14V?
5
Check wire circuit
1) Disconnect A/C compressor control relay from individual
circuit fuse box No.1 with ignition switch turn OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and "BLU/YEL" wire terminal of A/C
compressor control relay connector.
Is voltage 10 – 14 V?
6
Check wire circuit
1) Remove "A/C" fuse "20 A" from individual circuit fuse box
No.1 with ignition switch turned OFF.
2) Measure resistance between "BLU/YEL" wire terminal of
main fuse connector and engine ground.
Is resistance infinity?
7
Check wire circuit
1) Disconnect connector from A/C condenser cooling fan
with ignition switch tun OFF.
2) Measure resistance between engine ground and "RED"
wire terminal of A/C condenser fan connector.
Is resistance infinity?
8
Check A/C condenser cooling fan control relay
1) Check A/C condenser cooling fan control relay referring
to "A/C System Relay Inspection: Manual Type in
Section 7B".
Is result in good condition?
Action
Yes
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to "DTC P0481:
Cooling Fan 2 (A/C
Condenser Fan) Control
Circuit".
Go to Step 4.
Go to Step 7.
Faulty A/C compressor
control relay.
Open wire in "BLU/YEL"
circuit. If OK, go to Step
7.
Go to Step 8.
Go to Step 9.
No
Go to Step 2.
Go to Step 3.
Recharge refrigerant.
Go to Step 5.
Go to Step 6.
"BLU/YEL" wire shorted
to ground circuit.
"RED" wire shorted to
ground circuit.
Replace relay.

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