Toyota Tacoma manuals

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
1 Input signal check See input signal check on page 05745. check indicator light operation when driving with vehicle speed above 40 km/h (25 mph), and with vehicle speed below 40 km/h (25 mph). Ok: vehicle speed above 40 km/h (25 mph): indicator light blinks vehicle speed belo ...

System description
The ecm uses the signals from the throttle position sensor, airflow meter and crankshaft position sensor to monitor the engagement condition of the lockup clutch. Then the ecm compares the engagement condition of the lockup clutch with the lockup schedule in the ecm memory to detect mec ...

Replacement
1. Remove engine under cover rh 2. Drain coolant 3. Remove front wheel rh 4. Remove cylinder head cover no.2 Remove the 2 nuts, 2 clips and cylinder head cover. 5. Remove fan and generator v belt Turn the vribbed belt tensioner slowly clockwise and loosen it. Then, remove t ...

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