Oil Pressure Warning Lamp Does Not Turn Off (Oil Pressure Is Normal)

NOTE: For oil pressure inspection, refer to "INSPECTION " (MR20DE) or "INSPECTION " (QR25DE).

CHECK OIL PRESSURE WARNING LAMP OPERATION
Activate IPDM E/R auto active test. Refer to "AUTO ACTIVE TEST ".

Does oil pressure warning lamp blink?

YES: GO TO 2.

NO: GO TO 5.
CHECK IPDM E/R OUTPUT SIGNAL
1. Turn ignition switch OFF.
2. Disconnect oil pressure switch connector (with MR20DE) or double meter connector (with QR25DE).
3. Turn ignition switch ON.
4. Check voltage between oil pressure switch harness connector F32 (A) terminal 1 (with MR20DE) or double meter connector M89 (B) terminal 6 (with QR25DE) and ground.
  With MR20DE
  
  1 - ground : Battery voltage
  
  Fig 1: Checking Voltage Between Oil Pressure Switch Or Double Meter Connector Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  With QR25DE
  
  6 - ground : Battery voltage
  
  OK or NG
  
  OK: With MR20DE, GO TO 3. With QR25DE, refer to "OIL PRESSURE SENSOR INSPECTION ".
  
  NG: GO TO 4.
CHECK OIL PRESSURE SWITCH
1. Turn ignition switch OFF.
2. Check oil pressure switch. Refer to "COMPONENT INSPECTION ".
  OK or NG
  
  OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
  
  NG: Replace oil pressure switch.
CHECK OIL PRESSURE CIRCUIT
1. Disconnect IPDM E/R connector and oil pressure switch connector (with MR20DE) or double meter connector (with QR25DE).
2. Check continuity between IPDM E/R harness connector E46 (A) terminal 37 and oil pressure switch harness connector F32 (B) terminal 1 (with MR20DE) or double meter connector M89 (C) terminal 6 (with QR25DE).
  With MR20DE
  
  37 - 1 : Continuity should exist
  
  Fig 2: Checking Continuity Between IPDM E/R And Oil Pressure Switch Or Double Meter Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  With QR25DE
  
  37 - 6 : Continuity should exist
  
  OK or NG
  
  OK: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".
  
  NG: Repair harness or connector.
CHECK BCM INPUT SIGNAL
Select "BCM" on CONSULT-III. Then select "SIGNAL BUFFER". Operate ignition switch with "OIL PRESS SW" of "DATA MONITOR" and check operation status.

"OIL PRESS SW"

When ignition switch is in ON position (Engine stopped.) : ON

When engine running : OFF

OK or NG

OK: Replace BCM. Refer to "REMOVAL AND INSTALLATION OF BCM ".

NG: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION OF IPDM E/R ".