DTC Diagnosis Procedure
WARNING: This page is about a different variant/trim than selected.
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY CIRCUIT
- 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
F44
1
Ground
Battery voltage
P0036, P0051, P0052
2
F60
1
Is the inspection result normal?
YES
GO TO 3.
NO
GO TO 2.
- DETECT MALFUNCTIONING PART
Check the following.
- 20 A fuse (No. 53)
- Harness for open or short between A/F sensor 1 and fuse
- Loose or poor connection for each connector and harness
Repair or replace harness or connectors.
- CHECK A/F SENSOR 1 HEATER OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the 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
F44
2
F79
116
Existed
P0036, P0051, P0052
2
F60
2
117
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
GO TO 4.
NO
Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK A/F SENSOR 1 HEATER
Refer to Component Inspection (A/F Sensor 1 Heater) .
Is the inspection result normal?
YES
Repair or replace error-detected parts.
NO
GO TO 5.
- REPLACE A/F SENSOR 1
Replace malfunctioning A/F sensor 1. Refer to Exploded View .
CAUTION:- Discard any A/F sensor which has been dropped from a height of more than 0.5 m (19.7 in) onto a hard surface such as a concrete floor; use a new one.
- Before installing new A/F sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J-43897-12)] and approved anti-seize lubricant (commercial service tool).
INSPECTION END