目录.p65

Cooling - Cooling fan system

Cooling fan system..............................................

On-vehicle inspection......................................

1. Check cooling fan function at low temperature (below 95 ).
   (a) Turn ignition switch to ON.
   (b) Check cooling fan is stopped.
   Hint: if it is not stopped, check cooling fan relay and water temperature sensor, or check the
   joint or wire harness between them.
   (c) Uncouple water temperature sensor joint.
   (d) Check cooling fan runs.
   If it does not run, check fuse, cooling fan relay, engine ECU and cooling fan, or check there is short
   circuit between them.
   (e) Connect back water temperature sensor joint.


2. Check cooling fan function at high temperature (above 95 ).
   (a) Start engine and increase coolant temperature up to above
   Hint: water temperature is the value measured by water temperature sensor on water outlet.
   (d) Check cooling fan runs.
   Hint: if it does not run, please replace water temperature sensor.


3. Check cooling fan.
   (a) Uncouple cooling fan joint.
   (b) Connect battery and ampere meter to cooling fan joint.
   (c) Check cooling fan runs normally and check ampere meter reading.Standard current: 7 12A
   (d) Connect back cooling fan joint.

Inspection........................................................

1. Electronic fan relay [67000064]


2. Electronic fan relay II [67000072]


3. Cooling fan speed adjusting resistance assembly
   [67000001]
   Measure resistance between terminals with ohmmeter.
   Resistance: at normal temperature: 1.3

68

Specified

conditions

Normal state Conduction

Conduction

Terminal connected

Conditions by three-use meter

Supply battery voltage

to No. 1 and No. 2

terminals

Specified

conditions

Normal state Conduction

Conduction

Terminal connected

Conditions by three-use meter

Supply battery voltage

to No. 1 and No. 2

terminals