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Toyota Corolla Repair Manual: Inspection procedure

Hint

: read freeze frame data using the hand-held 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.

1 Read output dtc

  1. Clear the dtc.
  2.  warm up the engine.
  3.  run the engine at 3,000 rpm for 10 seconds or more.
  4.  connect the handheld tester or the obd ii scan tool to the dlc3.
  5.  turn the ignition switch on and push the handheld tester or the obd ii scan tool main switch on.
  6.  select the item diagnosis / enhanced obd ii / dtc info / current codes.
  7.  read the dtcs.

Result :

2 Inspect knock sensor

2 Inspect knock sensor

  1. Check the knock sensor installation.

    Torque: 20 nvm (204 kgfcm, 15 ftvlbf)

3 Check harness and connector(ecm  knock sensor)

3 Check harness and connector(ecm knock sensor)

  1. Disconnect the e4 ecm connector.
  2.  measure the resistance between terminals of the e4 ecm connector.

Standard:

  1. Reconnect the ecm connector.

4 Inspect ecm(knk1 voltage)

4 Inspect ecm(knk1 voltage)

  1. Disconnect the e4 ecm connector.
  2.  turn the ignition switch on.
  3.  measure the voltage between terminals of the e4 ecm terminals.

Standard:

  1. Reconnect the ecm connector.

Check for intermittent problems

Check for intermittent problems

Notice

: fault may be intermittent. Check harness and connectors carefully.

5 Inspect knock sensor

  1. Remove the k1 knock sensor.
  2.  measure the resistance between the terminals.

Standard:

  1. Reinstall the knock sensor.

Repair or replace harness or connector

Repair or replace harness or connector

Circuit description
A flat type knock sensor (nonresonant type) has the structure that can detect the vibration in a wider band of frequency from about 6 khz to 15 khz and has the following features. Knock sensors ...

Crankshaft position sensor a circuit
Dtc p0335 crankshaft position sensor a circuit Dtc p0339 crankshaft position sensor a circuit intermittent ...

Other materials:

Inspection procedure
Handheld tester: 1 Perform active test by handheld tester(operation of circuit opening relay) Connect the handheld tester to the dlc3.  turn the ignition switch on and push the handheld tester main switch on.  select the item diagnosis / enhanced obd ii / active test / fu ...

Circuit description
The vapor pressure sensor and the vsv for the canister closed valve (ccv) are used to detect abnormalities in the evaporative emission control system. The ecm decides whether there is an abnormality in the evaporative emission control system based on the vapor pressure sensor signal. Dtc p0 ...

Switching the display
Press to display or hide the album title. If there is additional text, is displayed. Press and hold to display the remaining text. ■USB memory functions ●Depending on the USB memory that is connected to the system, the device itself may not be operable and certain function ...

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