Diagnosis Procedure
- CHECK AIR FUEL RATIO (A/F) SENSOR 1 POWER SUPPLY
- Turn ignition switch OFF.
- Disconnect A/F sensor 1 harness connector.
- Turn ignition switch ON.
- Check the voltage between A/F sensor 1 harness connector and ground.
+ - Voltage A/F sensor 1 Connector Terminal F70 4 Ground Battery voltage Is the inspection result normal?
YES: GO TO 3.
NO: GO TO 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.
+ - Continuity A/F sensor 1 IPDM E/R Connector Terminal Connector Terminal F70 4 E14 36 Existed - Also check harness for short to ground.
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 INPUT SIGNAL CIRCUIT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
+ - Continuity A/F sensor 1 ECM Connector Terminal Connector Terminal F70 1 F25 21 Existed 2 25 - Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector and ground.
+ - Continuity A/F sensor 1 Connector Terminal F70 1 Ground Not existed 2 + - Continuity ECM Connector Terminal F25 21 Ground Not existed 25 - Also check harness for short to power.
Is the inspection result normal?
YES: GO TO 4.
NO: Repair or replace error-detected parts.
- CHECK INTERMITTENT INCIDENT
Perform "INTERMITTENT INCIDENT ".
Is the inspection result normal?
YES: GO TO 5.
NO: Repair or replace error-detected parts.
- REPLACE AIR FUEL RATIO (A/F) SENSOR 1
Replace air fuel ratio (A/F) sensor 1. Refer to "EXPLODED VIEW ".
CAUTION:- Discard any 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 sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner [commercial service tool (J-43897-18 or J43897-12)] and approved Anti-seize Lubricant (commercial service tool).
: INSPECTION END