Procedure B

1. CHECK COOLING FAN POWER SUPPLY CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect cooling fan relay-3.
      Fig 1: Identifying Throttle Control Motor Relay And Cooling Fan Relay

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Turn ignition switch ON.
   4. Check voltage between cooling fan relay-3 terminals 1, 3 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

   Fig 2: Checking Voltage Between Cooling Fan Relay-3 Terminals 1, 3 And Ground

   Courtesy of NISSAN MOTOR CO., U.S.A.

   OK or NG 

   OK: GO TO  3.

   NG: GO TO 2.

2. DETECT MALFUNCTIONING PART 

   Check the following.

   • Harness for open or short between cooling fan relay-3 and fuse
   • Harness for open or short between cooling fan relay-3 and battery

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

3. CHECK COOLING FAN MOTORS CONTROL CIRCUIT FOR OPEN AND SHORT 
   1. Turn ignition switch OFF.
   2. Disconnect cooling fan motor-2 harness connector.
      Fig 3: Identifying Cooling Fan Motor-2 Harness Connector

      Courtesy of NISSAN MOTOR CO., U.S.A.
   3. Check harness continuity between the following; cooling fan relay-3 terminal 5 and cooling fan motor-2 terminal 2, cooling fan motor-2 terminal 3 and cooling fan relay-3 terminal 6, cooling fan relay-3 terminal 7 and ground.

      Continuity should exist. 

   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.

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-3 terminal 2 and ECM terminal 89.

      Refer to WIRING DIAGRAM .

      Continuity should exist. 

   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 E125, M94 (2WD models)
   • Harness connectors E116, M75 (AWD models)
   • Harness for open or short between cooling fan relay-3 and ECM

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

6. CHECK COOLING FAN RELAY-3 

   Refer to "COMPONENT INSPECTION ".

   OK or NG 

   OK: GO TO 7.

   NG: Replace cooling fan relay.

7. CHECK INTERMITTENT INCIDENT 

   Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

INSPECTION END