Toyota Tacoma manuals

Toyota Corolla Repair Manual: Inspection procedure

Hint

:

Handheld tester:

1 Check other dtc output

  1. Connect the handheld tester to the dlc3.
  2.  turn the ignition switch on and push the handheld tester main switch on.
  3.  read the dtcs.

Result:

2 Check connection of pcv hose

2 Check connection of pcv hose

3 Check air induction system

3 Check air induction system

4 Perform active test using handheld tester(check iac valve

4 Perform active test using handheld tester(check iac valve operation)

  1. Warm up the engine to the normal operating temperature.
  2.  switch off all the accessories.
  3.  switch off the a/c.
  4.  shift the lever into the neutral position.
  5.  connect the handheld tester to the dlc3.
  6. select the item diagnosis / enhanced obd ii / active test / isc duty ratio.
  7.  check that the engine rpm varies when changing the isc duty ratio.

Engine rpm: engine rpm fluctuates up and down in response to the isc duty ratio variation.

5 Check a/c signal circuit

5 Check a/c signal circuit

6 Check blockage of iac valve and passage to bypass throttle

6 Check blockage of iac valve and passage to bypass throttle valve

7 Check harness and connector

7 Check harness and connector

  1. Disconnect the i1 iac valve connector.
  2.  turn the ignition switch on.
  3.  measure the voltage between the terminals of the iac valve wire harness side connector.

Standard:

  1. Reconnect the iac valve connector.

8 Check harness and connector(iac valve  ecm)

8 Check harness and connector(iac valve ecm)

  1. Disconnect the i1 iac 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 short):

Standard (check for short):

  1. Reconnect the ecm connector.
  2.  reconnect the iac valve connector.

9 Inspect idle air control valve

9 Inspect idle air control valve

Replace ecm

Replace ecm

Obd ii scan tool (excluding handheld tester):

1 Check other dtc output

  1. Connect the handheld tester to the dlc3.

Result:

2 Check connection of pcv hose

2 Check connection of pcv hose

3 Check air induction system

3 Check air induction system

4 Check a/c signal circuit

4 Check a/c signal circuit

5 Check blockage of iac valve and passage to bypass throttle

5 Check blockage of iac valve and passage to bypass throttle valve

6 Check harness and connector

6 Check harness and connector

  1. Disconnect the i1 iac valve connector.
  2.  turn the ignition switch on.
  3.  measure the voltage between the terminals of the iac valve wire harness side connector.

Standard:

  1. Reconnect the iac valve connector.

7 Check harness and connector(iac valve  ecm)

7 Check harness and connector(iac valve ecm)

  1. Disconnect the i1 iac 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 short):

Standard (check for short):

  1. Reconnect the ecm connector.
  2. reconnect the iac valve connector.

8 Inspect idle air control valve

8 Inspect idle air control valve

Replace ecm

Replace ecm

Circuit description
The rotary solenoid type idle air control (iac) valve is located under the throttle body and intake air bypassing the throttle valve flows into the iac valve through the passage. In this way ...

System voltage
Dtc p0560 system voltage ...

Other materials:

Ecm/pcm processor
Dtc p0606 ecm/pcm processor Monitor description The ecm continuously monitors its internal circuits. This selfcheck insures that the ecm is functioning properly. If a malfunction is detected, the ecm will set the appropriate dtc and illuminate the mil. The two cpus, main and sub cpu ins ...

Customer problem analysis
Hint: in troubleshooting, the problem symptoms must be confirmed accurately, meaning that all preconceptions must be set aside in order to make an accurate judgement. To ascertain what the problem symptoms are, it is extremely important to ask the customer about the problem and cond ...

Circuit description
The park/neutral position switch detects the shift lever position and sends signals to the ecm. Monitor description The park/neutral position switch detects the gearshift position and sends a signal to the ecm. For security, the park/neutral position switch detects the gearshift positio ...

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