Infiniti Q45. Manual — part 470

DTC P1217 ENGINE OVER TEMPERATURE

EC-519

C

D

E

F

G

H

I

J

K

L

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A

EC

Wiring Diagram

NBS0021V

TBWM0565E

EC-520

DTC P1217 ENGINE OVER TEMPERATURE

Specification data are reference values and are measured between each terminal and ground.

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.

Diagnostic Procedure

NBS0021W

1.

INSPECTION START

Do you have CONSULT-II?

Yes or No

Yes

>> GO TO 2.

No

>> GO TO 5.

2.

CHECK COOLING FAN LOW SPEED OPERATION

With CONSULT-II

1.

Start engine and let it idle.

2.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and touch “LOW” on the CONSULT-II screen.

CAUTION:

Never change cooling fan speed from “LOW” to “HI” or
from “HI” to “LOW” directly. Change the speed through
“MID” to prevent cooling fan motor from damage.

3.

Make sure that cooling fans-1 and -2 operate at low speed.

OK or NG

OK

>> GO TO 3.

NG

>> Check cooling fan low speed control circuit. (Go to

EC-

525, "PROCEDURE A"

.)

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

28

LG

Cooling fan relay-1 (Middle)

[Engine is running]

●

Cooling fan: Not operating

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Cooling fan: Middle speed or high speed
operating

0 - 1.0V

89

SB

Cooling fan relay -3(High)

[Engine is running]

●

Cooling fan: Not operating

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Cooling fan: High speed operating

0 - 1.0V

97

L/OR

Cooling fan relay-2 (Low)

[Engine is running]

●

Cooling fan: Not operating

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

●

Cooling fan: Low speed operating

0 - 1.0V

SEF784Z

DTC P1217 ENGINE OVER TEMPERATURE

EC-521

C

D

E

F

G

H

I

J

K

L

M

A

EC

3.

CHECK COOLING FAN MIDDLE SPEED OPERATION

With CONSULT-II

1.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and touch “MID” on the CONSULT-II screen.

2.

Make sure that cooling fans-1 and -2 operate at higher speed
than low speed.

OK or NG

OK

>> GO TO 4.

NG

>> Check cooling fan middle speed control circuit. (Go to

EC-528, "PROCEDURE B"

.)

4.

CHECK COOLING FAN HIGH SPEED OPERATION

With CONSULT-II

1.

Perform “COOLING FAN” in “ACTIVE TEST” mode with CON-
SULT-II and touch “HI” on the CONSULT-II screen.

CAUTION:

Never change cooling fan speed from “LOW” to “HI” or
from “HI” to “LOW” directly. Change the speed through
“MID” to prevent cooling fan motor from damage.

2.

Make sure that cooling fan-2 operates at higher speed than mid-
dle speed.

OK or NG

OK

>> GO TO 8.

NG

>> Check cooling fan high speed control circuit. (Go to

EC-

530, "PROCEDURE C"

.)

PBIB1668E

SEF785Z

EC-522

DTC P1217 ENGINE OVER TEMPERATURE

5.

CHECK COOLING FAN LOW SPEED OPERATION

Without CONSULT-II

1.

Turn ignition switch ON.

2.

Disconnect cooling fan relay-1 and -3.

3.

Start engine and let it idle.

4.

Set temperature lever at full cold position.

5.

Turn air conditioner switch ON.

6.

Turn blower fan switch ON.

7.

Make sure that cooling fans-1 and -2 operate at low speed.

OK or NG

OK

>> GO TO 6.

NG

>> Check cooling fan low speed control circuit. (Go to

EC-

525, "PROCEDURE A"

.)

6.

CHECK COOLING FAN MIDDLE SPEED OPERATION

Without CONSULT-II

1.

Turn ignition switch OFF.

2.

Reconnect cooling fan relay-1 and disconnect cooling fan relay-2.

3.

Disconnect engine coolant temperature sensor harness connector.

4.

Connect 200

Ω

resistor to engine coolant temperature sensor harness connector.

5.

Restart engine and make sure that cooling fans-1 and -2 oper-
ate at higher speed than low speed.

OK or NG

OK

>> GO TO 7.

NG

>> Check cooling fan middle speed control circuit. (Go to

EC-528, "PROCEDURE B"

.)

PBIB2427E

PBIB2428E

SEC163BA

PBIB1667E