Procedure For Malfunction A

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

   Refer to "GROUND INSPECTION ".

   Fig 1: Identifying Body Ground Connections

   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.
   • Heated oxygen sensor 2 (Bank 1) harness connector (1)
   • Heated oxygen sensor 2 (Bank 1) (2)
   • Heated oxygen sensor 2 (Bank 2) (3)
   • Heated oxygen sensor 2 (Bank 2) harness connector (4)
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 35 and HO2S2 terminal 1. 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.

Fig 2: Identifying Oxygen Sensor 2 Harness Connector

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

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

   Refer to WIRING DIAGRAM .

   TERMINALS CONTINUITY CHART
   
   

   DTC	Terminal		Bank
   	ECM	Sensor
   P0137	33	4	1
   P0157	34	4	2

   Continuity should exist. 

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

   Refer to WIRING DIAGRAM .

   TERMINALS CONTINUITY CHART
   
   

   DTC	Terminal		Bank
   	ECM	Sensor
   P0137	33	4	1
   P0157	34	4	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 "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

: INSPECTION END