Mazda MX-3 silhouetteMX-3

COOLANT FAN SYSTEM

E2-11wiring diagram

Circuit shows MTX (manual transaxle) coolant fan relay group; condenser fan group is for A/C-equipped vehicles.

SYSTEM CIRCUIT

Coolant Fan System Circuit
Components (16)
ECM (Water Temperature / Engine Condition)Engine coolant temperature sensorA/C switchClosed throttle positionIgnition switchData link connectorCoolant fan relay No.1Coolant fan relay No.2Coolant fan motorFan relay high No.1Fan relay high No.2Fan relay lowA/C relayCondenser fan motorMagnetic clutchBattery
Connections (6)
Engine coolant temperature sensor
Engine coolant temperature sensorECM (Water Temperature / Engine Condition)??
ECM (Water Temperature / Engine Condition)
ECM (Water Temperature / Engine Condition):LCoolant fan relay No.1??— LOW
ECM (Water Temperature / Engine Condition):3NFan relay high No.1??— MEDIUM/HIGH
ECM (Water Temperature / Engine Condition):2PFan relay high No.2??— HIGH
ECM (Water Temperature / Engine Condition):3LA/C relay??
Battery
BatteryCoolant fan relay No.1??

System Inspection

  1. 1
    Turn the ignition switch to OFF.
  2. 2
    Ground the TEN terminal of the data link connector and open the throttle slightly.
    Illustration showing the data link connector with the TEN and GND terminals labeled, and a jumper wire being inserted into the data link connector to ground the TEN terminal.
  3. 3
    Turn the ignition switch on and verify that the fan operates.
  4. 4
    If the fan does not operate, inspect the coolant fan system components and wire harness.
  5. 5
    Remove the filler cap and place a thermometer in the filler neck.
  6. 6
    Start the engine.
  7. 7
    Verify that the fan operates when the coolant temperature reaches approx. 100°C {212°F}.
  8. 8
    If it does, check the engine coolant temperature sensor. (Refer to page E2-14.)
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See also

page E2-14

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