Toyota Tacoma manuals

Toyota Corolla Repair Manual: 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).

  1. Perform active test using the handheld tester (a/f control).

Hint

: a/f control is the active test which changes the injection volume to 12.5 % Or +25 %.

  1.  Connect the handheld tester to the dlc3 on the vehicle.
  2.  Turn the ignition switch on.
  3.  Warm up the engine by running the engine speed at 2,500 rpm for approximately 90 seconds.
  4.  Select the item diagnosis / enhanced obd ii / active test / a/f control.
  5.  Perform a/f control with the engine in an idle condition (press the right or left button).

Result: heated oxygen sensor reacts in accordance with increase and decrease of injection volume +25 %  rich output: more than 0.5 V, 12.5 %  Lean output: less than 0.4 V

Notice

: there is a delay of few seconds in the sensor 1 (front sensor) output, and there is about 20 seconds delay at maximum in the sensor 2 (rear sensor)

The following of a/f control procedure enables the technician to check and

The following of a/f control procedure enables the technician to check and graph the voltage outputs of both the heated oxygen sensors.

For displaying the graph indication, enter active test / a/f control / user data, then select o2s b1s1 and o2s b1s2 by pressing yes button and push enter button before pressing f4 button.

Notice

: if the vehicle is short of fuel, the airfuel ratio becomes lean and dtc p0133 will be recorded, and the mil then comes on. Hint

:

1 Check other dtc output(in addition to dtc p0133)

  1. Connect the handheld tester or the obd ii scan tool to the dlc3.
  2.  turn the ignition switch on and push the handheld tester or the obd ii scan tool main switch on.
  3.  read the dtcs using the handheld tester or the obd ii scan tool.

Result

:

Hint:

Hint

: if any other codes besides p0133 are output, perform the troubleshooting for those dtcs first.

2 Read value of handheld tester or obd ii scan tool(heated

2 Read value of handheld tester or obd ii scan tool(heated oxygen sensor during idling)

  1. Connect the handheld tester or the obd ii scan tool to the dlc3.
  2.  start the engine and push the handheld tester or the obd ii scan tool main switch on.
  3.  select the item diagnosis / enhanced obd ii / data list / all / o2s b1s1.
  4.  warm up the heated oxygen sensor with the engine speed at 2,500 rpm for approximately 90 seconds.
  5. read the output voltage of the heated oxygen sensor during idling.

Heated oxygen sensor output voltage: alternates between less than 0.35 V and more than 0.45 V, and period of t must exist less than 0.6 Sec. (See the following table).

3 Inspect heated oxygen sensor(heater resistance)

3 Inspect heated oxygen sensor(heater resistance)

  1. Disconnect the h5 heated oxygen sensor connector.
  2.  measure the resistance between the terminals of the heated oxygen sensor connector.

Standard:

  1. Reconnect the heated oxygen sensor connector.

4 Inspect efi relay

4 Inspect efi relay

  1. Remove the efi relay from the engine room r/b.
  2.  check for continuity in the efi relay.

Standard:

  1. Reinstall the efi relay.

5 Check harness and connector(heated oxygen sensor  ecm)

5 Check harness and connector(heated oxygen sensor ecm)

  1. Disconnect the h5 heated oxygen sensor connector.
  2.  disconnect the e4 ecm connector.
  3.  check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for short):

Standard (check for short):

  1. Reconnect the ecm connector.
  2.  reconnect the heated oxygen sensor connector.

6 Check air induction system

6 Check air induction system

  1. Check the air induction system for vacuum leaks

7 Check fuel pressure

7 Check fuel pressure

  1. Check the fuel pressure (high or low pressure).

8 Inspect fuel injector assy(injection and volume)

8 Inspect fuel injector assy(injection and volume)

Replace heated oxygen sensor

Replace heated oxygen sensor

9 Perform confirmation driving pattern

Hint

: clear all dtcs prior to performing the confirmation driving pattern.

10 Read output dtc(dtc p0133 is output again)

10 Read output dtc(dtc p0133 is output again)

  1. Connect the handheld tester or the obd ii scan tool to the dlc3.
  2.  turn the ignition switch on and push the handheld tester or the obd ii scan tool main switch on.
  3.  read the dtcs using the handheld tester or the obd ii scan tool.

Result:

Replace heated oxygen sensor

Replace heated oxygen sensor

Circuit description
Refer to dtc p0130 Dtc no. Dtc detection condition Trouble area P0133 After engine has been warmed up, if response time that heated oxygen sensors output volt ...

Oxygen sensor circuit no activity detected
Dtc p0134 oxygen sensor circuit no activity detected (bank 1 sensor 1) ...

Other materials:

Inspection procedure
1 Input signal check See input signal check on page 05745. check indicator light operation when driving with vehicle speed above 40 km/h (25 mph), and with vehicle speed below 40 km/h (25 mph). Ok: vehicle speed above 40 km/h (25 mph): indicator light blinks vehicle speed belo ...

SRS airbags
The SRS airbags inflate when the vehicle is subjected to certain types of severe impacts that may cause significant injury to the occupants. They work together with the seat belts to help reduce the risk of death or serious injury. ◆ SRS front airbags 1 SRS driver airbag/front passenge ...

Deactivating or stopping the alarm
Do one of the following to deactivate or stop the alarm: ● Unlock the doors or open the trunk. ● Vehicles without a smart key system: Turn the engine switch to the ACC or ON position, or start the engine. (The alarm will be deactivated or stopped after a few seconds.) ● V ...

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