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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.

Hint

:

1 Check other dtc output(in addition to dtc p0136)

  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 p0136 are output, perform the troubleshooting for those dtcs first.

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

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

  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 b1s2.
  4.  after warming up the engine, run the engine at 2,500 rpm for 3 minutes.
  5.  read the output voltage of the heated oxygen sensor (sensor 2) when the engine rpm is suddenly increased

Hint

: quickly accelerate the engine to 4,000 rpm 3 times by using the accelerator pedal.

Standard: the output voltage of heated oxygen sensor (sensor 2): alternates from 0.4 V or less to 0.5 V or more.

3 Inspect heated oxygen sensor(heater resistance)

3 Inspect heated oxygen sensor(heater resistance)

  1. Disconnect the h8 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 h8 heated oxygen sensor connector.
  2.  disconnect the e4 and e5 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.

Replace heated oxygen sensor

Replace heated oxygen sensor

6 Perform confirmation driving pattern

Hint

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

7 Read output dtc(dtc p0136 is output again)

7 Read output dtc(dtc p0136 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.  select the item diagnosis / enhanced obd ii / dtc info / current codes.
  4.  read the dtcs.

Result:

Replace heated oxygen sensor

Replace heated oxygen sensor

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: During driving w ...

System too lean/rich
Dtc p0171 system too lean (bank 1) Dtc p0172 system too rich (bank 1) ...

Other materials:

Adjusting the set speed
To change the set speed, operate the lever until the desired set speed is obtained. 1 Increases the speed 2 Decreases the speed Fine adjustment: Momentarily move the lever in the desired direction. Large adjustment: Hold the lever in the desired direction. The set speed will be increased or dec ...

Setting the vehicle speed
1 Press the ON-OFF button to activate the cruise control. Cruise control indicator will come on. Press the button again to deactivate the cruise control. 2 Press the ON-OFF button to activate the cruise control. Cruise control indicator will come on. Press the button again to deactivate t ...

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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