Diagnosis Procedure
- CHECK AIR FUEL RATIO 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 P0130 1 F67 4 Ground 3.0 V P0150 2 F68 4 Is the inspection result normal?
YES: GO TO 2.
NO: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK A/F SENSOR 1 INPUT 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 1sensor ECM Continuity Bank Connector Terminal Connector Terminal P0130 1 F67 3 F110 88 Existed P0150 2 F68 3 78 - Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.
DTC A/F 1sensor ECM Ground Continuity Bank Connector Terminal Connector Terminal P0130 1 F67 3 F110 88 Ground Not existed P0150 2 F68 3 78 - Also check harness for short to power.
Is the inspection result normal?
YES: GO TO 3.
NO: Repair open circuit, short to ground or short to power in harness or connectors.
- CHECK A/F SENSOR 1 GROUND 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 P0130 1 F67 6 F110 94 Existed P0150 2 F68 6 74 - Also check harness for 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 INTERMITTENT INCIDENT
Perform "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: GO TO 5.
NO: Repair or replace malfunctioning part.
- REPLACE A/F SENSOR 1
Replace malfunctioning A/F sensor 1. Refer to "REMOVAL AND INSTALLATION ".
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