Infiniti M45 (Y34). Manual - part 456

DTC P1217 ENGINE OVER TEMPERATURE

EC-513

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Wiring Diagram

ABS00339

TBWM0048E

EC-514

DTC P1217 ENGINE OVER TEMPERATURE

Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

Diagnostic Procedure

ABS0033A

1. 

CHECK COOLING FAN OPERATION-I

Start engine and make sure that cooling fan operates.

OK or NG

OK (With CONSULT-II)>>GO TO 3.
OK (With CONSULT-II)>>GO TO 4.
NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

Cooling fan fluid for leak

●

Drive belts (Refer to 

EM-13, "DRIVE BELTS"

 )

●

Cooling fan pump (Refer to 

CO-7, "COOLING SYSTEM"

 )

●

Cooling fan drive pump (Refer to 

CO-7, "COOLING SYSTEM"

 )

>> Repair or replace.

3. 

CHECK COOLING FAN OPERATION-II

 With CONSULT-II

1.

Select “TARGET FAN RPM” in “ACTIVE TEST” mode with CON-
SULT-II.

2.

Change “TRGT FAN RPM” indication by touching “UP” and
“DOWN”, then make sure that the cooling fan operating speed
changes according to “TRGT FAN RPM” indication.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 5.

TER-

MINAL 

NO.

WIRE 

COLOR

ITEM

CONDITION

DATA (DC Voltage)

28

L

Cooling fan speed control 
solenoid valve ground

[Engine is running]

Approximately 0V

47

R

Cooling fan speed control 
solenoid valve

[Engine is running]

●

Idle speed

6.5 - 8V

PBIB0049E

PBIB0143E

DTC P1217 ENGINE OVER TEMPERATURE

EC-515

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4. 

CHECK COOLING FAN OPERATION-II

 Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Disconnect radiator coolant temperature sensor harness connector.

3.

Connect 2.2k

Ω

 resistor to radiator coolant temperature sensor connector.

4.

Start engine.

5.

Make sure that cooling fan operates at higher speed than the
speed at test No. 1.

OK or NG

OK

>> GO TO 9.

NG

>> GO TO 5.

5. 

CHECK GROUND CONNECTIONS

1.

Turn ignition switch OFF.

2.

Loosen and retighten two ground screws. 
Refer to 

EC-141, "Ground Inspection"

 .

OK or NG

OK

>> GO TO 6.

NG

>> Repair or replace ground connections.

6. 

CHECK COOLING FAN SPEED CONTROL SOLENOID VALVE CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect ECM harness connector.

3.

Check harness continuity between ECM terminal 28 and ground.
Refer to Wiring Diagram.

OK or NG

OK

>> GO TO 7.

NG

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

7. 

CHECK COOLING FAN SPEED CONTROL SOLENOID VALVE

Refer to 

EC-583, "Component Inspection"

OK or NG

OK

>> GO TO 8.

NG

>> Replace cooling fan speed control solenoid valve.

PBIB1861E

PBIB1118E

Continuity should not exist.

EC-516

DTC P1217 ENGINE OVER TEMPERATURE

8. 

DETECT MALFUNCTIONING PART

Check the following.

●

Cooling fan fluid for leak

●

Drive belts (Refer to 

EM-13, "DRIVE BELTS"

 )

●

Cooling fan pump (Refer to 

CO-7, "COOLING SYSTEM"

 )

●

Cooling fan drive pump (Refer to 

CO-7, "COOLING SYSTEM"

 )

>> Repair or replace.

9. 

CHECK RADIATOR COOLANT TEMPERATURE SENSOR

Refer to 

EC-438, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace radiator coolant temperature sensor.

10. 

CHECK COOLING SYSTEM FOR LEAK

Apply pressure to the cooling system with a tester, and check if the
pressure drops.

CAUTION:

Higher than the specified pressure may cause radiator damage.
Pressure should not drop.
OK or NG

OK

>> GO TO 12.

NG

>> GO TO 11.

11. 

DETECT MALFUNCTIONING PART

Check the following for leak.

●

Radiator

●

Hose

●

Water pump (Refer to 

CO-22, "WATER PUMP"

 )

>> Repair or replace.

12. 

CHECK RADIATOR CAP

Apply pressure to cap with a tester and check radiator cap relief
pressure.

OK or NG

OK

>> GO TO 13.

NG

>> Replace radiator cap.

Testing pressure: 157 kPa (1.6 kg/cm

2

 , 23 psi)

PBIC1528E

Radiator cap relief pressure:

59 - 98 kPa (0.6 - 1.0 kg/cm

2

 , 9 - 14 psi)

SLC755A