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).

  1.  perform active test using 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 heated oxygen sensor dtcs will be recorded, and the mil then comes on.

Hint

:

1 Check other dtc output(in addition to heated oxygen sensor dtcs)

  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.  select the item diagnosis / enhanced obd ii / dtc info / current codes.
  4.  read the dtcs.

Result:

Hint:

Hint

: if any other codes besides p0130, p2195 and/or p2196 are output, perform the troubleshooting for those dtcs first.

2 Read value of handheld tester or

2 Read value of handheld tester or

  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 repeatedly between less than 0.4 V and more than 0.5 V (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(heated oxygen sensor dtcs are output again)

10 Read output dtc(heated oxygen sensor dtcs are 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 dtc using the handheld tester or the obd ii scan tool.

Result:

Replace heated oxygen sensor

Replace heated oxygen sensor

Circuit description
The rear heated oxygen sensor is used to monitor oxygen concentration in the exhaust gas. For optimum catalytic converter operation, the air fuel mixture must be maintained near the ideal stoich ...

Oxygen sensor circuit slow response
Dtc p0133 oxygen sensor circuit slow response (bank 1 sensor 1) ...

Other materials:

Overhaul
1. Remove bench type rear seat cushion assy Disengage the 2 clamps, and then remove the seat cushion. 2. Remove bench type rear seat back assy  remove the headrests.  remove the 2 bolts and seat back. 3. Remove bench type rear seat cushion cover  remove the ho ...

Problem symptoms table
If a normal code is displayed during the dtc check but the problem still occurs, check the circuits for each problem symptom in the order given in the table below and proceed to the relevant troubleshooting page. Notice: when replacing skid control ecu, sensor or etc., Turn the ignition swi ...

Overhaul
1. Remove repair service starter kit Remove the nut, then disconnect the lead wire from terminal c. Remove the 2 screws which are used to secure the repair service starter kit to the starter drive housing.  remove the repair service starter kit.  remove the return ...

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