Infiniti FX35 / FX45. Manual - part 420

DTC P1217 ENGINE OVER TEMPERATURE

EC-441

< SERVICE INFORMATION >

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Diagnosis Procedure

INFOID:0000000001326296

PROCEDURE A

1.

INSPECTION START

Do you have CONSULT-III?

Yes or No

Yes

>> GO TO 2.

TBWM0307E

EC-442

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DTC P1217 ENGINE OVER TEMPERATURE

No

>> GO TO 3.

2.

CHECK COOLING FAN OPERATION

 With CONSULT-III

1.

Start engine and let it idle.

2.

Select “COOLING FAN” in “ACTIVE TEST” mode with CONSULT-III.

3.

Make sure that cooling fans-1 and -2 operate at each speed (LOW/MID/HI).

OK or NG

OK

>> GO TO 4.

NG

>> Check cooling fan control circuit. (Go to “PROCEDURE B”.)

3.

CHECK COOLING FAN OPERATION

 Without CONSULT-III

1.

Perform IPDM E/R auto active test and check cooling fan motors operation, refer to 

PG-20, "Auto Active

Test"

.

2.

Make sure that cooling fans-1 and -2 operate at each speed (Low/Middle/High).

OK or NG

OK

>> GO TO 4.

NG

>> Check cooling fan control circuit. (Go to “PROCEDURE B”.)

4.

CHECK COOLING SYSTEM FOR LEAK

Refer to 

CO-10, "Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>>

Check the following for leak.

• Hose
• Radiator
• Water pump

5.

CHECK RADIATOR CAP

Refer to 

CO-14, "Checking Radiator Cap"

.

OK or NG

OK

>> GO TO 6.

NG

>> Replace radiator cap.

6.

CHECK THERMOSTAT

Refer to 

CO-27

.

OK or NG

OK

>> GO TO 7.

NG

>> Replace thermostat

7.

CHECK ENGINE COOLANT TEMPERATURE SENSOR

Refer to 

EC-197, "Component Inspection"

.

OK or NG

OK

>> GO TO 8.

NG

>> Replace engine coolant temperature sensor.

8.

CHECK MAIN 12 CAUSES

If the cause cannot be isolated, go to 

EC-445, "Main 12 Causes of Overheating"

.

>> INSPECTION END

PROCEDURE B

1.

CHECK COOLILNG FAN POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect IPDM E/R harness connectors E6.

DTC P1217 ENGINE OVER TEMPERATURE

EC-443

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3.

Check voltage between IPDM E/R terminal 16 and ground with
CONSULT-III or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2.

DETECT MALFUNCTIONING PART

Check the following.
• 40A fusible link
• Harness for open or short between IPDM E/R and battery

>> Repair open circuit or short to ground or short to power in harness or connectors.

3.

CHECK COOLING FAN GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check harness continuity between IPDM E/R terminal 15, 38, 60 and ground.
Refer to Wiring Diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit or short to power in harness or connectors.

4.

CHECK COOLING FAN MOTOR-1 CIRCUIT-I

1.

Disconnect cooling fan motor-1 harness connector.

2.

Check voltage between cooling fan motor-1 terminals 1, 2 and
ground with CONSULT-III or tester.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• 40A fusible link

Voltage: Battery voltage

PBIB0966E

Continuity should exist.

PBIB1554E

Voltage: Battery voltage

PBIB1670E

EC-444

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DTC P1217 ENGINE OVER TEMPERATURE

• Harness connectors E29, E121
• Harness for open or short between cooling fan motor-1 and battery

>> Repair open circuit or short to ground or short to power in harness or connectors.

6.

CHECK COOLING FAN MOTOR-1 CIRCUIT-II

1.

Check harness continuity between the following;
cooling fan motor-1 terminal 3 and IPDM E/R terminal 13,
cooling fan motor-1 terminal 4 and IPDM E/R terminals 10, 12.
Refer to Wiring diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 8.

NG

>> GO TO 7.

7.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E29, E121
• Harness for open or short between cooling fan motor-1 and IPDM E/R

>> Repair open circuit or short to ground or short to power in harness or connectors.

8.

CHECK COOLING FAN MOTOR-2 CIRCUIT-I

1.

Disconnect cooling fan motor-2 harness connector.

2.

Check harness continuity between cooling fan motor-2 terminals
3, 4 and ground.
Refer to Wiring diagram.

3.

Also check harness short to power.

OK or NG

OK

>> GO TO 10.

NG

>> GO TO 9.

9.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E29, E121
• Harness for open or short between cooling fan motor-2 and ground

>> Repair open circuit or short to power in harness or connectors.

10.

CHECK COOLING FAN MOTOR-2 CIRCUIT-II

1.

Check harness continuity between the following;
cooling fan motor-2 terminal 1 and IPDM E/R terminal 8,
cooling fan motor-2 terminal 2 and IPDM E/R terminals 11, 14.
Refer to Wiring Diagram.

2.

Also check harness for short to ground and short to power.

OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11.

DETECT MALFUNCTIONING PART

Continuity should exist.

Continuity should exist.

PBIB1554E

Continuity should exist.