 1.CHECK GROUND CONNECTION
- Turn ignition switch OFF.
- Check ground connection M95. Refer to Ground Inspection in Circuit Inspection.
Is the inspection result normal?
YES >>GO TO 2. NO >>Repair or replace ground connection.
 2.CHECK HO2S2 POWER SUPPLY CIRCUIT
- Disconnect heated oxygen sensor 2 (HO2S2) harness connector.
- Turn ignition switch ON.
- Check the voltage between heated oxygen sensor 2 harness connector and ground.
DTC
| HO2S2
| Ground
| Voltage
| Bank
| Connector
| Terminal
| P0037, P0038
| 1
| F53
| 2
| Ground
| Battery voltage
| P0057, P0058
| 2
| F52
| 2
|
Is the inspection result normal?
YES >>GO TO 4. NO >>GO TO 3.
 3.DETECT MALFUNCTIONING PART
Check the following. - Harness connectors F103, M116
- Harness connectors E106, M6
- IPDM E/R harness connector E7
- 15A fuse (No. 46)
- Harness for open or short between heated oxygen sensor 2 and fuse
>>Repair open circuit, short to ground or short to power in harness or connectors.
 4.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect ECM harness connector.
- Check the continuity between HO2S2 harness connector and ECM harness connector.
DTC
| HO2S2
| ECM
| Continuity
| Bank
| Connector
| Terminal
| Connector
| Terminal
| P0037, P0038
| 1
| F53
| 3
| F102
| 55
| Existed
| P0057, P0058
| 2
| F52
| 3
| 56
|
- Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >>GO TO 5. NO >>Repair open circuit, short to ground or short to power in harness or connectors.
 5.CHECK HEATED OXYGEN SENSOR 2 HEATER
 6.REPLACE HEATED OXYGEN SENSOR 2
Replace malfunctioning heated oxygen sensor 2. ■ CAUTION ■ - Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (1.6 ft) onto a hard surface such as a concrete floor; use a new one.
- Before installing new oxygen 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
 7.CHECK INTERMITTENT INCIDENT
|