For California

COOLING FAN

Description

The ECM controls the cooling fan corresponding to the vehicle speed, engine coolant temperature, refrigerant pressure, and air conditioner ON signal. The control system has 3-step control [HIGH/LOW/OFF].

COOLING FAN MOTOR

Models without A/C
The cooling fan operates at each speed when the current flows in the cooling fan motor as per the following.





Models with A/C
The cooling fan operates at high (HI) speed when the current flows, and operates at low (LOW) speed when cooling fan motor and the resistor are circuited in series.


Component Function Check


1. CHECK COOLING FAN FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Perform "COOLING FAN" in "ACTIVE TEST" mode with CONSULT.
3.Touch "LOW" and "Hi" on the CONSULT screen.
4.Check that cooling fan operates at each speed.
Without CONSULT
1.Perform IPDM E/R auto active test and check cooling fan motor operation. With I-Key or Without I-Key.
2.Check that cooling fan operates at each speed.
Is the inspection result normal?
YES- INSPECTION END
NO- .


Diagnosis Procedure


1. CHECK GROUND CONNECTION

1.Turn ignition switch OFF.
2.Check ground connection E21. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace ground connection.

2. CHECK COOLING FAN MOTOR CIRCUIT

1.Disconnect cooling fan motor harness connector.
2.Check the continuity between IPDM E/R harness connector and cooling fan motor harness connector.





3.Check the continuity between cooling fan motor harness connector and ground.





4.Also check harness for short to ground and short to power.
OK or NG
OK- GO TO 4.
NG- GO TO 3.

3. DETECT MALFUNCTIONING PART

Check the following.
- Harness for open or short between cooling fan motor and IPDM E/R
- Harness for open or short between cooling fan motor and ground
- Repair open circuit or short to ground or short to power in harness or connectors.

4. CHECK COOLING FAN MOTOR

.
OK or NG
OK- GO TO 5.
NG- Replace cooling fan motor. Exploded View.

5. CHECK INTERMITTENT INCIDENT

Perform Intermittent Incident.
OK or NG
OK- Replace IPDM E/R. Removal And Installation With I-Key (With I-Key) or Removal And Installation Without I-Key (Without I-Key).
NG - Repair or replace harness or connector.


Component Inspection


COOLING FAN MOTOR

1.Disconnect cooling fan motor harness connectors.
2.Supply cooling fan motor terminals with battery voltage and check operation.





Cooling fan motor should operate.
If NG, replace cooling fan motor.