P0135

DTC P0135 - Front Heated Oxygen Sensor Heater (Right Bank)

Description





SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the front heated oxygen sensor heaters corresponding to the engine speed.

OPERATION





Consult 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 32 (ECCS 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 10.5V and I 6V at idle.

With CONSULT





1. Turn ignition switch "ON" and select "DATA MONITOR" mode with CONSULT.
2. Start engine and run it for at least 6 seconds at idle speed.

With GST
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.

No Tools
1. Start engine and run it for at least 6 seconds at idle speed.
2. Turn ignition switch "OFF", wait at least 5 seconds and then turn "ON".
3. Perform "Diagnostic Test Mode II (Self-diagnostic results)" with ECM.
- When using GST, "DTC Confirmation Procedure" should be performed twice as much as when using CONSULT or ECM (Diagnostic Test Mode II) because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. Therefore, using CONSULT or ECM (Diagnostic Test Mode II) is recommended.

Wiring Diagram

Right Bank





Left Bank





Connectors

Right Bank





Left Bank





Diagnostic Procedure

Steps 1 - 4:

Component Inspection
FRONT HEATED OXYGEN SENSOR HEATER





- 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.