Suzuki 2006 SX4, Service Manual

Page: 211 / 1478

Engine General Information and Diagnosis: 1A-167
Radiator Cooling Fan High Speed Control System Check
S6RW0C1104095
Wiring Diagram
Refer to “Radiator Cooling Fan Low Speed Control System Check”.
Troubleshooting
WARNING
!
Keep hands, tools, and clothing away from radiator cooling fan to help prevent personal injury. This
fan is electric and can come on whether or not the engine is running. The fan can start automatically in
response to the ECT sensor with the ignition switch at the “ON” position.
NOTE
• Before performed troubleshooting, be sure to read the “Precautions of ECM Circuit Inspection”.
• When measuring circuit voltage, resistance and/or pulse signal at ECM connector, connect the
special tool to ECM and/or the ECM connectors referring to “Inspection of ECM and Its Circuits”.
Step Action Yes No
1 Low speed radiator cooling fan control circuit check
1) Check low speed radiator cooling fan control circuit
referring to “Radiator Cooling Fan Low Speed Control
System Check”.
Is it in good condition?
Go to Step 2. Repair or replace faulty
condition.
2 High speed radiator cooling fan control circuit check
1) Start engine and select “Data List” mode on scan tool.
2) Warm up engine until coolant temp. is 102.5
°
C, 216.5
°
F
or higher and A/C switch turns OFF. (If engine coolant
temp. dose not rise, check engine cooling system or
ECT sensor.)
Is radiator cooling fan started at high speed when engine
coolant temp. reached above temp?
Radiator cooling fan
control system is in
good condition. Perform from Step 2 to
Step 6 of “DTC P0480:
Fan 1 Control Circuit”.
If OK, Go to Step 3.
3 Radiator cooling fan check
1) Check radiator cooling fan referring to “Radiator Cooling
Fan Assembly Inspection in Section 1F”.
Is it in good condition?
Substitute a known-
good ECM and recheck. Faulty radiator cooling
fan.