Diagnosis Procedure
WARNING: This page is about a different car, the 2012 Nissan Pathfinder. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK GROUND CONNECTIONS
- Turn ignition switch OFF.
- Loosen and retighten ground screws on the body.
Refer to "GROUND INSPECTION ".
OK or NG
OK: GO TO 2.
NG: Repair or replace ground connections.
- CHECK HEATED OXYGEN SENSOR 2 HEATER POWER SUPPLY CIRCUIT
- Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
- Turn ignition switch ON.
- Check voltage between HO2S2 terminal 3 and ground with CONSULT or tester.
Voltage: Battery voltage
Courtesy of NISSAN NORTH AMERICA, INC.
OK or NG
OK: GO TO 4.
NG: GO TO 3.
- DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E2, F32
- IPDM E/R harness connector E119
- 15 A fuse (No. 54)
- Harness for open or short between heated oxygen sensor 2 and IPDM E/R
Repair harness or connectors.
- CHECK HO2S2 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check harness continuity between ECM terminal and HO2S2 terminal as per the following.
Refer to WIRING DIAGRAM .
DTC Terminals Bank ECM Sensor P0037, P0038 6 2 1 P0057, P0058 25 2 2 Continuity should exist .
- Also check harness for short to ground and short to power.
OK or NG
OK: GO TO 5.
NG: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to "COMPONENT INSPECTION ".
OK or NG
OK: GO TO 6.
NG: Replace malfunctioning heated oxygen sensor 2. Refer to REMOVAL AND INSTALLATION .
- CHECK INTERMITTENT INCIDENT
Refer to "INTERMITTENT INCIDENT ".
>> INSPECTION END