Procedure A

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E44.
3. Check voltage between IPDM E/R terminal 22 and ground with CONSULT or tester.

Voltage: Battery voltage 

Fig 1: Checking IPDM E/R Power Supply Circuit

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO  3.

NG: GO TO 2.

Check the following.

• 40 A 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.

1. Disconnect cooling fan relays-4 (2) and -5 (1).
   • ←: Vehicle front
   Fig 2: Identifying Cooling Fan Relays 4 And 5

   Courtesy of NISSAN NORTH AMERICA, INC.
2. Check voltage between cooling fan relays-4, -5 terminal 1 and ground with CONSULT or tester.

Voltage: Battery voltage 

Fig 3: Checking Cooling Fan Relays Power Supply Circuit

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO  5.

NG: GO TO 4.

Check the following.

• 40 A fusible link
• Harness for open or short between cooling fan relays-4, -5 and battery

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

1. Disconnect cooling fan motor-2 (2) harness connector.
   • ←: Vehicle front
   • Cooling fan motor-1 (1)
   Fig 4: Identifying Cooling Fan Motor 1 And 2

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2. Check voltage between cooling fan motor-2 terminal 2, 4 and ground with CONSULT or tester.

Voltage: Battery voltage 

Fig 5: Checking Cooling Fan Motors Power Supply Circuit

Courtesy of NISSAN NORTH AMERICA, INC.

OK or NG 

OK: GO TO  7.

NG: GO TO 6.

Check the following.

• 40 A fusible link
• Harness for open or short between cooling fan motor-2 and battery

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

1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E43, E44 and E46.
3. Disconnect cooling fan motor-1 (1) harness connector.
   • ←: Vehicle front
   • Cooling fan motor-2 (2)
4. Check harness continuity between the following;

   cooling fan relay-4 terminal 2 and IPDM E/R terminal 45,

   cooling fan relay-4 terminal 5 and IPDM E/R terminal 23,

   cooling fan relay-5 terminal 2 and IPDM E/R terminal 6,

   cooling fan relay-5 terminal 5 and ground,

   cooling fan relay-4 terminal 3 and cooling fan motor-1 terminal 2,

   cooling fan motor-1 terminal 2 and IPDM E/R terminal 24,

   cooling fan motor-1 terminal 4 and IPDM E/R terminal 20,

   cooling fan motor-1 terminal 1, 3 and ground.

   IPDM E/R terminal 39, 59 and ground.

   cooling fan relay-4 terminal 5 and cooling fan motor-2 terminal 1,

   cooling fan relay-5 terminal 3 and cooling fan motor-2 terminal 3,

   Refer to Wiring Diagram .

   Continuity should exist  .

   Fig 6: Identifying Cooling Fan Motor-1 And Motor-2

   Courtesy of NISSAN NORTH AMERICA, INC.
5. Also check harness for short to ground and short to power.

OK or NG 

OK: GO TO  9.

NG: GO TO 8.

Check the following.

• Harness for open or short between cooling fan relay-4 and IPDM E/R
• Harness for open or short between cooling fan relay-5 and IPDM E/R
• Harness for open or short between cooling fan relay-4 and cooling fan motor-1
• Harness for open or short between cooling fan relay-4 and cooling fan motor-2
• Harness for open or short between cooling fan relay-5 and cooling fan motor-2
• Harness for open or short between cooling fan relay-5 and ground
• Harness for open or short between cooling fan motor-1 and ground
• Harness for open or short between IPDM E/R and ground

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

Loosen and retighten ground screw on the body.

Refer to "GROUND INSPECTION ".

Fig 7: Identifying Body Ground (E9 And E15) And Washer Tank With Fuse And Fusible Link Box

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OK or NG 

OK: GO TO 10.

NG: Repair or replace ground connections.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 11.

NG: Replace malfunctioning cooling fan relay. For the relay number, refer to "WIRING DIAGRAM ". For the relay layout, refer to , "HARNESS LAYOUT ".

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 12.

NG: Replace malfunctioning cooling fan motor. Refer to , "REMOVAL AND INSTALLATION ".

Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG 

OK: Replace IPDM E/R. Refer to IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM) .

NG: Repair or replace harness or connector.