Procedure A

CHECK COOLING FAN POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect IPDM E/R harness connectors E120.
3. Check voltage between IPDM E/R terminal 22 and ground with CONSULT-II or tester.
Voltage: Battery voltage

OK or NG

OK: GO TO 3.

NG: GO TO 2.

Fig 1: Checking Voltage Between IPDM E/R Terminal 22 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 IPDM E/R and battery
: Repair open circuit or short to ground in harness or connectors.
CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN AND SHORT
1. Disconnect IPDM E/R harness connectors E120, E124.
2. Disconnect cooling fan motor harness connector.
3. Check harness continuity between the following;
  cooling fan motor terminal 1 and IPDM E/R terminal 20,
  
  cooling fan motor terminal 2 and IPDM E/R terminal 24.
  
  Refer to WIRING DIAGRAM .
  
  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.
  
  Fig 2: Checking Cooling Fan Motor Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK COOLING FAN MOTER GROUND CIRCUIT FOR OPEN OR SHORT
1. Check harness continuity between the following;
  cooling fan motor terminal 3 and ground,
  
  cooling fan motor terminal 4 and ground.
  
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
2. Also check harness for short to power.
OK or NG

OK: GO TO 5.

NG: Repair open circuit or short to power in harness or connectors.
CHECK COOLING FAN MOTOR
Refer to "COMPONENT INSPECTION "

OK or NG

OK: GO TO 6.

NG: Replace cooling fan motor.
CHECK INTERMITTENT INCIDENT
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.