P0135
P0135 (BANK 1), P0155 (BANK 2) HO(2)S(1) HEATERDescription
System Description:
Operation:
Consult-II Reference Value In Data Monitor Mode:
On Board Diagnosis Logic
Malfunction is detected when the current amperage in the heated oxygen sensor 1 heater circuit is out of the normal range.
(An improper voltage drop signal is sent to ECM through the heated oxygen sensor 1 heater.)
Possible Cause
- Harness or connectors
(The heated oxygen sensor 1 heater circuit is open or shorted.)
- Heated oxygen sensor 1 heater
DTC Confirmation Procedure
NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 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 GST
1. Start engine and run it for at least 6 seconds at idle speed.
2. Turn ignition switch "OFF" and wait at least 10 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.
Wiring Diagram
EC-O2H1B1-01:
BANK 1
EC-O2H1B2-01:
BANK 2
Step 1 - 2:
Step 3 - 5:
Diagnostic Procedure
Component Inspection
HEATED OXYGEN SENSOR 1 HEATER
1. Check resistance between HO(2)S(1) terminals as follows.
2. If NG, replace heated oxygen sensor 1.
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 heated oxygen sensor, clean exhaust system threads using Heated Oxygen Sensor Thread Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.
Removal and Installation
HEATED OXYGEN SENSOR 1
Refer to "EXHAUST MANIFOLD AND THREE WAY CATALYST".