Toyota Tacoma manuals

Toyota Corolla Repair Manual: Inspection procedure

Hint

: hand–held 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 hand–held 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 hand–held 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 air–fuel 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 hand–held tester or the obd ii scan tool to the dlc3.
  2.  turn the ignition switch on and push the hand–held 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 hand–held tester or

2 Read value of hand–held tester or

  1. Connect the hand–held tester or the obd ii scan tool to the dlc3.
  2.  start the engine and push the hand–held 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 hand–held tester or the obd ii scan tool to the dlc3.
  2.  turn the ignition switch on and push the hand–held tester or the obd ii scan tool main switch on.
  3.  read the dtc using the hand–held 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:

Radio broadcast cannot be received (bad reception)
Inspection procedure 1 Check if radio auto–search functions properly Check if the radio auto–search functions properly.  Perform the auto–search of the radio and check that it functions normally. Standard: the radio auto–search functions properly. 2 Check optional compone ...

Sound quality is bad only when cd is played(volume is too low)
Inspection procedure 1 Replace cd with another and recheck Replace the cd with another and recheck.  Check the installation condition of the radio receiver assembly. Standard: malfunction disappear. Check and replace radio receiver assy ...

Bluetooth® Audio (Multimedia system)
Listening to Bluetooth® Audio The Bluetooth® audio system enables the user to enjoy music played on a portable player from the vehicle speakers via wireless communication. When a Bluetooth® device cannot be connected, check the connection status on the “Bluetooth* Audio” screen. If the device ...

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