Suzuki 2006 SX4, Service Manual

Page: 203 / 1478

Engine General Information and Diagnosis: 1A-159
4 Check wire circuit
1) Disconnect A/C condenser cooling fan relay from fuse
box No.2 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 relay connector.
Is voltage 10 – 14V?
Go to Step 7. Go to Step 5.
5 Check wire circuit
1) Disconnect A/C compressor relay from fuse box No.2
with ignition switch turn OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and “BLU/YEL” wire terminal of A/C
compressor relay connector.
Is voltage 10 – 14 V?
Faulty A/C compressor
relay. Go to Step 6.
6 Check wire circuit
1) Remove “A/C” fuse “20 A” from fuse box No.2 with
ignition switch turned OFF.
2) Measure resistance between “BLU/YEL” wire terminal of
main fuse connector and engine ground.
Is resistance infinity?
Open wire in “BLU/YEL”
circuit. If OK, go to Step
7. “BLU/YEL” wire shorted
to ground circuit.
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?
Go to Step 8. “RED” wire shorted to
ground circuit.
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 in Section 7B”.
Is result in good condition?
Go to Step 9. Replace relay.
9 Check wire circuit
1) Install “A/C” fuse “20 A” to fuse box No.2.
2) Connect A/C condenser cooling fan relay to fuse box
No.2 with ignition switch turn OFF.
3) Start engine then turn ON A/C switch and blower motor
switch.
4) Measure voltage between engine ground and “RED”
wire terminal in A/C condenser fan harness connector.
Is voltage 10 – 14 V?
Go to Step 10. Open wire in “RED”
circuit.
10 Check wire circuit
1) Disconnect connector from A/C condenser cooling fan
with ignition switch turned OFF.
2) Measure resistance between “BLK” wire terminal of A/C
condenser cooling fan connector and engine ground.
Is resistance below 1
Ω
?
Go to Step 11. Open or high resistance
wire in “BLK” circuit.
11 Check A/C condenser cooling fan
1) Check A/C condenser cooling fan operates referring to
“Condenser Cooling Fan Inspection in Section 7B”.
Is it good condition?
Substitute a known-
good ECM and recheck. Faulty A/C condenser
cooling fan.
Step Action Yes No