Procedure For Malfunction A

1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body.

   Refer to "GROUND INSPECTION ".

   Fig 1: Identifying Body Ground Screw

   Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG 

OK: GO TO 2.

NG: Repair or replace ground connections.

1. Disconnect heated oxygen sensor 2 harness connector.
   Fig 2: Identifying Heated Oxygen Sensor 2 Harness Connector

   Courtesy of NISSAN MOTOR CO., U.S.A.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 78 and HO2S2 terminal 4.

   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 3.

NG: Repair open circuit or short to ground or short to power in harness or connectors.

1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.

   Refer to WIRING DIAGRAM .

   CONTINUITY REFERENCE CHART
   
   

   DTC	Terminals		Bank
   	ECM	Sensor
   P0138	55	1	1
   P0158	74	1	2

2. Check harness continuity between the following terminals and ground.

   Refer to WIRING DIAGRAM .

   Continuity should exist. 

   CONTINUITY REFERENCE CHART
   
   

   DTC	Terminals		Bank
   	ECM	Sensor
   P0138	55	1	1
   P0158	74	1	2

   Continuity should not exist. 

3. Also check harness for 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.

Check connectors for water.

Water should not exist. 

OK or NG 

OK: GO TO 5.

NG: Repair or replace harness or connectors.

Refer to "COMPONENT INSPECTION ".

OK or NG 

OK: GO TO 6.

NG: Replace malfunctioning heated oxygen sensor 2.

Refer to "HOW TO CHECK TERMINAL " and "INTERMITTENT INCIDENT ".

INSPECTION END