Toyota Tacoma manuals

Toyota Corolla Repair Manual: Inspection procedure

Hint

: read freeze frame data using the handheld tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the airfuel ratio was lean or rich, etc. At the time of the malfunction.

Handheld tester

1 Perform active test by handheld tester(operate ocv)

  1. Connect the handheld tester to the dlc3.
  2.  start the engine and warm it up.
  3.  turn the ignition switch on and push the handheld tester main switch on.
  4.  select the item diagnosis / enhanced obd ii / active test / vvt ctrl b1.
  5.  check the engine speed when operating the oil control valve (ocv) by the handheld tester.

Standard:

2 Inspect camshaft timing oil control valve assy(ocv)

2 Inspect camshaft timing oil control valve assy(ocv)

3 Inspect ecm(ocv signal)

3 Inspect ecm(ocv signal)

  1. Inspection using the oscilloscope.
  2. during idling, check the waveform between the terminals of the e3 ecm connector.

Standard:

4 Check harness and connector(camshaft timing oil control valve

4 Check harness and connector(camshaft timing oil control valve (ocv) ecm)

  1. Disconnect the c2 camshaft timing oil control valve connector.
  2.  disconnect the e3 ecm connector.
  3.  check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for open):

Standard (check for short):

Standard (check for short):

  1. Reconnect the camshaft timing oil control valve connector.
  2.  reconnect the ecm connector.

Check for intermittent problems

Check for intermittent problems

Obdii scan tool (excluding handheld tester):

1 Inspect camshaft timing oil control valve assy(operate ocv)

  1. Disconnect the c2 camshaft timing oil control valve connector.
  2.  apply positive battery voltage between the terminals of the camshaft timing oil control valve.
  3.  check the engine speed.

    Standard

    : engine speed is rough idle or engine is stalled.

  4.  reconnect the camshaft timing oil control valve connector.

2 Inspect ecm(ocv signal)

2 Inspect ecm(ocv signal)

  1. Inspection using the oscilloscope.
  2.  during idling, check the waveform between the terminals of the e3 ecm connector.

Standard:

3 Check harness and connector(camshaft timing oil control valve

3 Check harness and connector(camshaft timing oil control valve (ocv) ecm)

  1. Disconnect the c2 camshaft timing oil control valve connector.
  2.  disconnect the e3 ecm connector.
  3.  check the resistance between the wire harness side connectors.

Standard (check for open):

Standard (check for open):

Standard (check for short):

Standard (check for short):

  1. Reconnect the camshaft timing oil control valve connector.
  2. reconnect the ecm connector.

Check for intermittent problems

Check for intermittent problems

Circuit description
The variable valve timing (vvt) system includes the ecm, the oil control valve (ocv) and the vvt controller. The ecm sends a target dutycycle control signal to the ocv. This control signal, ...

Camshaft position a timing over
Dtc p0011 camshaft position a timing over advanced or system performance (bank 1) Dtc p0012 camshaft position a timing over retarded (bank 1) ...

Other materials:

Basic inspection
Resistance measuring condition of electronic parts  unless stated, all resistance is measured at an ambient temperature of 20 c (68 F). As the resistance may be outside the specifications if measured at high temperatures immediately after the vehicle has been running, measur ...

Sound setting
1 Display the Phone/Message Settings screen. 2 Select Sound Settings on the Phone/Message Settings screen. 1 Set the desired ringtone. 2 Adjust the ringtone volume. 3 Adjust the message readout volume. 4 Set the desired incoming SMS/MMS tone. 5 Adjust the incoming SMS/ MMS tone volume. ...

Precaution
1. Check that the battery cables are connected to the correct terminals. 2. Disconnect the battery cables when the battery is given a quick charge. 3. Do not perform tests with a high voltage insulation resistance tester. 4. Never disconnect the battery while the engine is running. 5. Check that ...

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