Infiniti M35/M45 Y50. Manual — part 686

DTC P1217 ENGINE OVER TEMPERATURE

EC-1217

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Wiring Diagram

NBS005KU

TBWT1540E

EC-1218

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DTC P1217 ENGINE OVER TEMPERATURE

TBWT1497E

DTC P1217 ENGINE OVER TEMPERATURE

EC-1219

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Diagnostic Procedure

NBS005KV

1.

CHECK COOLING FAN OPERATION

With CONSULT-II

1.

Turn ignition switch ON.

2.

Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with
CONSULT-II.

3.

Make sure that cooling fan speed varies according to the per-
cent.

Without CONSULT-II

1.

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

PG-23, "Auto Active Test"

.

2.

Make sure that cooling fan operates.

OK or NG

OK

>> GO TO 2.

NG

>> GO TO 6.

2.

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 3.

NG

>> Check the following for leak. Refer to

CO-40, "LEAK

CHECK"

.

●

Hose

●

Radiator

●

Water pump

3.

CHECK RADIATOR CAP

Apply pressure to cap with a tester.

OK or NG

OK

>> GO TO 4.

NG

>> Replace radiator cap.

PBIB2737E

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

EC-1220

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DTC P1217 ENGINE OVER TEMPERATURE

4.

CHECK THERMOSTAT

Check the following.

●

Thermostat. (Refer to

CO-55, "THERMOSTAT AND WATER CONTROL VALVE"

.)

●

Water control valve. (Refer to

CO-55, "THERMOSTAT AND WATER CONTROL VALVE"

.)

●

Engine coolant temperature sensor. (Refer to

EC-931, "Component Inspection"

.)

OK or NG

OK

>> GO TO 5.

NG

>> Replace malfunctioning component.

5.

CHECK MAIN 13 CAUSES

If the cause cannot be isolated, go to

EC-1223, "Main 13 Causes of Overheating"

.

>> INSPECTION END

6.

CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT-I

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan control module (1) harness connector
E42.

–

: Vehicle front

–

Cooling fan motor-2 (2)

–

Cooling fan motor-1 (3)

3.

Turn ignition switch ON.

4.

Check voltage between cooling fan control module terminal 3
and ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 7.

NG

>> GO TO 12.

7.

CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check harness continuity between cooling fan control module terminal 1 and ground.
Refer to wiring diagram.

3.

Also check harness for short to power.

OK or NG

OK

>> GO TO 8.

NG

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

PBIB3346E

Voltage: Battery voltage

PBIA9509J

Continuity should exist.