Procedure A

CHECK IPDM E/R POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E123.
3. Check voltage between IPDM E/R terminal 15 and ground with CONSULT-II or tester.
  
  Fig 1: Checking Voltage Between IPDM E/R Terminal 15 And 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.
- 40A fusible link
- Harness for open or short between IPDM E/R and battery
  1. Repair open circuit or short to ground in harness or connectors.
CHECK IPDM E/R GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Check harness continuity between IPDM E/R terminal 16 and ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
3. Also check harness for short to power.
OK or NG
1. OK: GO TO 4.
2. NG: Repair open circuit or short to power in harness or connectors.
CHECK COOLING FAN MOTOR-1 CIRCUIT FOR OPEN AND SHORT-1
1. Disconnect cooling fan motor-1 harness connector.
  
  Fig 2: Disconnecting Cooling Fan Motor-1 Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
2. Check voltage between cooling fan motor-1 terminals 1, 2 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
OK or NG
1. OK: GO TO 6 .
2. NG: GO TO 5.
  
  Fig 3: Checking Voltage Between Cooling Fan Motor-1 Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- 40A fusible link
- Harness for open or short between cooling fan motor-1 and battery
  1. Repair open circuit or short to ground in harness or connectors.
CHECK COOLING FAN MOTOR-1 CIRCUIT FOR OPEN AND SHORT-II
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connector E118.
3. Check harness continuity between the following terminals.
  Cooling fan motor-1 terminal 13 and IPDM E/R terminal 8
  
  Cooling fan motor-1 terminal 14 and IPDM E/R terminals 11, 12
  
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
4. Also check harness for short to ground or short to power.
OK or NG
1. OK: GO TO 7.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK COOLING FAN MOTOR-2 CIRCUIT FOR OPEN AND SHORT-I
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-2 harness connector.
3. Check harness continuity between cooling fan motor-2 terminals 3, 4 and ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
4. Also check harness for short to power.
OK or NG
1. OK: GO TO 8.
2. NG: Repair open circuit or short to power in harness or connectors.
  
  Fig 4: Disconnecting Cooling Fan Motor-2 Harness Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING FAN MOTOR-2 CIRCUIT FOR OPEN AND SHORT-II
1. Check harness continuity between the following terminals.
  Cooling fan motor-2 terminal 1 and IPDM E/R terminal 10, 14
  
  Cooling fan motor-2 terminal 2 and IPDM E/R terminals 13
  
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
2. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 9.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK COOLING FAN MOTORS
Refer to COMPONENT INSPECTION .

OK or NG
1. OK: GO TO 10.
2. NG: Replace cooling fan motors.
CHECK INTERMITTENT INCIDENT
Perform TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT .

OK or NG
1. OK: Replace IPDM E/R. Refer to IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM .
2. NG: Repair or replace harness or connector.