Procedure B

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK COOLING FAN MOTORS CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect cooling fan motor-1 harness connector and cooling fan motor-2 harness connector.
3. Disconnect IPDM E/R harness connectors E5, E6.
4. Check harness continuity between the following;
  Cooling fan motor-1 terminal 1 and IPDM E/R terminal 8, cooling fan motor-1 terminal 4 and IPDM E/R terminal 9,
  
  IPDM E/R terminal 14, 38, 60 and ground.
  
  Refer to wiring diagram.
  1. Continuity should exist.
5. Also check harness for short to ground and short to power.
6. Check harness continuity between the following;
  Cooling fan motor-2 terminal 1 and IPDM E/R terminal 13, cooling fan motor-2 terminal 4 and IPDM E/R terminal 12.
  
  Refer to wiring diagram.
  1. Continuity should exist.
7. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
Fig 1: Locating Cooling Fan Motor-1 & 2 Harness Connector
Courtesy of NISSAN MOTOR CO., U.S.A.
DETECT MALFUNCTIONING PART
Check the following.
- Harness for open or short between cooling fan motors-1, 2 and IPDM E/R
- Harness for open or short between cooling fan motors-1, 2 and ground
- Harness for open or short between IPDM E/R and ground
  1. Repair open circuit or short to ground or short to power in harness connectors.
CHECK COOLING FAN MOTORS
Refer to Component Inspection .

OK or NG
1. OK: GO TO 4.
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 connectors.