Diagnostic Test
WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY
- Disconnect air fuel ratio (A/F) sensor 1 harness connector.
- Turn ignition switch ON.
- Check the voltage between A/F sensor 1 harness connector and ground.
DTC A/F sensor 1 Ground Voltage Bank Connector Terminal P0030, P0031, P0032 1 F72 1 Ground Battery voltage P0036, P0051, P0052 2 F73 1
Is the inspection result normal?
YES
GO TO STEP 3 .
NO
GO TO STEP 2 .
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect IPDM E/R harness connector.
- Check the continuity between A/F sensor 1 harness connector and IPDM E/R harness connector.
DTC A/F sensor 1 IPDM E/R Continuity Bank Connector Terminal Connector Terminal P0030, P0031, P0032 1 F72 1 F19 52 Existed P0036, P0051, P0052 2 F73 1 53 Is the inspection result normal?
YES
Perform the trouble diagnosis for power supply circuit.
NO
Repair or replace error-detected parts.
- CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check harness continuity between A/F sensor 1 harness connector and ECM harness connector.
DTC A/F sensor 1 ECM Continuity Bank Connector Terminal Connector Terminal P0030, P0031, P0032 1 F72 2 F78 6 Existed P0036, P0051, P0052 2 F73 2 46 - Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO STEP 4 .
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK A/F SENSOR 1 HEATER
Check A/F sensor 1 heater. Refer to COMPONENT INSPECTION .
Is the inspection result normal?
YES
Check intermittent incident. Refer to INTERMITTENT INCIDENT .
NO
Replace malfunctioning air fuel ratio (A/F) sensor 1. Refer to REMOVAL AND INSTALLATION (BANK 2) , REMOVAL AND INSTALLATION (BANK 1) .