P0057
DTC P0057 HO2S2 HEATERDescription
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heaters corresponding to the engine speed.
Operation:
CONSULT-II Reference Value In Data Monitor Mode:
On Board Diagnosis Logic:
DTC Confirmation Procedure
NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 10.5 V and 16 V at idle.
WITH CONSULT-II
1. Turn ignition switch ON and select "DATA MONITOR" mode with CONSULT-II.
2. Start engine and warm it up to the normal operating temperature.
3. Turn ignition switch "OFF" and wait at least 10 seconds.
4. Start engine and keep the engine speed at between 3,500 and 4,000 rpm for at least one minute under no load.
5. Let engine idle for one minute.
6. If 1st trip DTC is detected, go to "Diagnostic procedure.
WITH GST
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch "OFF"and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no load.
4. Let engine idle for one minute.
5. Turn ignition switch "OFF" and wait at least 10 seconds.
6. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no load.
7. Let engine idle for one minute.
8. Select "MODE 3" with GST.
9. If DTC is detected, go to "Diagnostic Procedure" below.
- When using GST, "DTC Confirmation Procedure" should be performed twice as much as when using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. Therefore, using CONSULT-II is recommended.
EC-O2H2B1-01:
EC-O2H2B2-01:
Wiring Diagram
Diagnostic Procedure Step 1 - 2:
Diagnostic Procedure Step 3 - 6:
Diagnostic Procedure
Component Inspection
HEATED OXYGEN SENSOR 2 HEATER
Check the following.
1. Check resistance between HO2S2 terminals 2 and 3.
Resistance : 2.3 - 4.3 Ohm at 25 °C (77 °F)
2. Check continuity.
CAUTION:
- Discard any heated oxygen 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 oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.