Toyota Tacoma manuals

Toyota Corolla Repair Manual: Circuit description

Refer to dtc p0130

Dtc no

Dtc detection condition

Trouble area

P0136 The following condition (a) or (b) continues for 300 seconds or more:
  1. During driving with the engine warmed up, heated oxygen sensor o tp t does not change output change.
  2. heated oxygen sensor output is very low most of the time.
  • Open or short in heated oxygen sensor (bank 1 sensor 2) circuit
  • Heated oxygen sensor (bank 1 sensor 2)
  • Heated o gen sensor heater (bank 1 sensor 2)
  • Efi relay

Hint

: sensor 2 refers to the sensor farthest away from the engine assembly.

Monitor description

The heated oxygen sensor generates waveform of a voltage between 0 v and 1 v in response to the oxygen concentration in the exhaust gases. When the output voltage of the heated oxygen sensor is 0.5 V or more, the ecm judges that the airfuel ratio is rich. When it is 0.40 V or less, the ecm judges that the airfuel ratio is lean.

If the rear heated oxygen sensor output dose not change between rich and lean during stop and go driving, the ecm interprets this as a malfunction in the rear heated oxygen sensor and sets a dtc. Also, if the sensor output remains at less than 0.05 V for more than 156 seconds when ecm monitored the heated oxygen sensor for 260 seconds while the air fuel feedback is being performed (the detecting condition differs depending on the type of vehicles), the ecm will interpret this as a fault. In either case, the ecm will turn on the mil and set a dtc.

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Component operating range

Component operating range

Monitor result (mode 06 data)

Monitor result (mode 06 data)

Refer to page 0527 for detailed information on checking monitor status.

Refer to page 0527 for detailed information on checking monitor status.

Wiring diagram

Refer to dtc p0130

Confirmation driving pattern

  1. Connect the handheld tester to the dlc3.
  2.  switch the handheld tester from the normal mode to the check mode .
  3.  start the engine and let it idle for 60 seconds or more.
  4.  drive the vehicle at 25 mph (40 km/h) or more for 40 seconds or more.
  5.  let the engine idle for 10 seconds or more.
  6.  perform steps (d) and (e) 12 times.

Hint

: if a malfunction exists, the mil will be illuminated on the multi information display during step (f).

Notice

: if the conditions in this test are not strictly followed, a malfunction detection will not occur. If you do not have a handheld tester, turn the ignition switch off after performing steps from (c) to (f), then perform steps from (c) to (f) again.

Oxygen sensor circuit malfunction
Dtc p0136 oxygen sensor circuit malfunction (bank 1 sensor 2) ...

Inspection procedure
Hint: handheld tester only: narrowing down the trouble area is possible by performing a/f control active test (heated oxygen sensor or other trouble areas can be distinguished). Perform ac ...

Other materials:

Check and replace ecu
Notice: start an inspection of the connector from the backside of the connector on the wire harness side with the connector connected to the ecu. When no measurement condition is specified, perform the inspection with the engine stopped and also the ignition switch on. First check the ec ...

Adjustment
1. Inspect park/neutral position switch assy  apply the parking brake and turn the ignition switch on.  depress the brake pedal and check that the engine starts only when the shift lever is set in n or p position and it does not start in the other position.  check that th ...

Inspection procedure
Hint: handheld tester only: narrowing down the trouble area is possible by performing a/f control active test (heated oxygen sensor or other trouble areas can be distinguished).  perform active test using handheld tester (a/f control). Hint: a/f control is the active test whi ...

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