P0135

SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the front heated oxygen sensor heater corresponding to the engine operating condition.

OPERATION:

CONSULT-II Reference Value in Data Monitor Mode
Specification data are reference values.




ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and 48 (ECM ground).

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 run it for at least 6 seconds at idle speed.
3. If 1st trip DTC is detected, go to "Diagnostic Procedure".

With Generic Scan Tool
1. Start engine and run it for at least 6 seconds at idle speed.
2. Turn ignition switch "OFF" and wait at least 5 seconds.
3. Start engine and run it for at least 6 seconds at idle speed.
4. Select "MODE 3" with GST.
5. If DTC is detected, go to "Diagnostic Procedure".
- 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-FRO2/H-01:

EC-FRO2/H-01 - Connector Views:

WIRING DIAGRAM

M1,M2,M3,M4,M5,B1,E71,E72,E73 Connector Views:

Step 1:

Step 2:

Step 3:

Step 4:

Step 5:

DIAGNOSTIC PROCEDURE

Component Inspection




Check resistance between terminals 3 and 1.
Resistance: 2.3 - 4.3 Ohms at 25 °C (77 °F)
Check continuity between terminals 2 and 1, 3 and 2.
Continuity should not exist.
If NG, replace the front heated oxygen sensor.

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.