Infiniti Q45. Manual - part 472

DTC P1217 ENGINE OVER TEMPERATURE

EC-527

C

D

E

F

G

H

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J

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A

EC

6. 

CHECK COOLING FAN MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between cooling fan relay-2 terminal 1 and ECM terminal 97.
Refer to Wiring Diagram.

3.

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 E34, F34

●

Harness for open or short between cooling fan relay-2 and ECM

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

8. 

CHECK COOLING FAN RELAY-2

Refer to 

EC-532, "Component Inspection"

 .

OK or NG

OK

>> GO TO 9.

NG

>> Replace cooling fan relay.

9. 

CHECK COOLING FAN MOTORS-1 AND -2

Refer to 

EC-532, "Component Inspection"

 .

OK or NG

OK

>> GO TO 10.

NG

>> Replace cooling fan motors.

10. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-528

DTC P1217 ENGINE OVER TEMPERATURE

PROCEDURE B

1. 

CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan relay-1.

3.

Turn ignition switch ON.

4.

Check voltage between cooling fan relay-1 terminals 1, 5 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

10A fuse

●

40A fusible link

●

Fuse, fusible link and relay block (J/B) connector E3

●

Harness for open or short between cooling fan relay-1 and fuse

●

Harness for open or short between cooling fan relay-1 and battery

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

3. 

CHECK COOLING FAN MOTOR CONTROL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan motors-1 and -2 harness connector.

3.

Check harness continuity between the following terminals.
cooling fan motor-2 terminal 3 and cooling fan relay-1 terminal 6,
cooling fan relay-1 terminal 7 and ground,
cooling fan relay-1 terminal 3 and cooling fan motor-1 terminal 1.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 4.

NG

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

PBIB2427E

Voltage: Battery voltage

PBIB0887E

Continuity should exist.

PBIB2426E

DTC P1217 ENGINE OVER TEMPERATURE

EC-529

C

D

E

F

G

H

I

J

K

L

M

A

EC

4. 

CHECK COOLING FAN MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Disconnect ECM harness connector.

2.

Check harness continuity between cooling fan relay-1 terminal 2 and ECM terminal 28.
Refer to Wiring Diagram.

3.

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

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5. 

DETECT MALFUNCTIONING PART

Check the following.

●

Harness connectors E34, F34

●

Harness for open or short between cooling fan relay-2 and ECM

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

6. 

CHECK COOLING FAN RELAY-1

Refer to 

EC-532, "Component Inspection"

 .

OK or NG

OK

>> GO TO 7.

NG

>> Replace cooling fan relay.

7. 

CHECK COOLING FAN MOTORS-1 AND -2

Refer to 

EC-532, "Component Inspection"

 .

OK or NG

OK

>> GO TO 8.

NG

>> Replace cooling fan motors.

8. 

CHECK INTERMITTENT INCIDENT

Refer to 

EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

 .

>> INSPECTION END

Continuity should exist.

EC-530

DTC P1217 ENGINE OVER TEMPERATURE

PROCEDURE C

1. 

CHECK COOLING FAN MOTOR POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan relay-3.

3.

Turn ignition switch ON.

4.

Check voltage between cooling fan relay-3 terminal 2 and
ground with CONSULT-II or tester.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

2. 

DETECT MALFUNCTIONING PART

Check the following.

●

10A fuse

●

Fuse, fusible link and relay block (J/B) connector E3

●

Harness for open or short between cooling fan relay-1 and fuse

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

3. 

CHECK COOLING FAN MOTOR CONTROL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect cooling fan motor-2 harness connector.

3.

Check harness continuity between the following terminals.
cooling fan motor-2 terminal 4 and cooling fan relay-3 terminal 3,
cooling fan relay-3 terminal 5 and ground.
Refer to Wiring Diagram.

4.

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

OK or NG

OK

>> GO TO 4.

NG

>> Repair open circuit or short to ground or short to power

in harness or connectors.

PBIB2428E

Voltage: Battery voltage

PBIB2450E

Continuity should exist.

PBIB2426E