Procedure A

CHECK POWER SUPPLY
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, 3, 6 and ground with CONSULT-II or tester.
  
  Fig 1: Checking Voltage Between Cooling Fan Relay-1 Terminals 1, 3, 6 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Voltage: Battery voltage
OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
DETECT MALFUNCTIONING PART
Check the following.
- Fuse block (J/B) connector E103
- Fuse and fusible link box connectors E23, E25
- 10A fuse
- 40A fusible links
- 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.
CHECK COOLING FAN GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
3. Check harness continuity between cooling fan relay-1 terminal 5 and cooling fan motor-1 terminal 1, cooling fan motor-1 terminal 4 and ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
  
  Fig 2: Disconnecting Cooling Fan Motor-1 & Cooling Fan Motor-2 Harness Connectors
  Courtesy of NISSAN MOTOR CO., U.S.A.
4. Also check harness for short to ground and short to power.
5. Check harness continuity between cooling fan relay-1 terminal 7 and cooling fan motor-2 terminal 1, cooling fan motor-2 terminal 4 and ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
6. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 4.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK OUTPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 97 and cooling fan relay-1 terminal 2.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 6.
2. NG: GO TO 5.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E9, F47
- Harness for open or short between cooling fan relay-1 and ECM
  Repair open circuit or short to ground or short to power in harness or connectors.
CHECK COOLING FAN RELAY-1
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 7.
2. NG: Replace cooling fan relay.
CHECK COOLING FAN MOTORS-1 AND -2
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 8.
2. NG: Replace cooling fan motors.
CHECK INTERMITTENT INCIDENT
Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".
1. INSPECTION END