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:

Starting off on a steep uphill
► Automatic transmission or continuously variable transmission 1 Make sure that the parking brake is set and shift the shift lever to D. 2 Gently depress the accelerator pedal. 3 Release the parking brake. ► Manual transmission 1 With the parking brake firmly set and the clutch pe ...

Onvehicle inspection
1. Check cooling fan operation with low temperature (below 83 c (181 f)) Turn the ignition switch on.  check that the cooling fan stops. Hint: if not, check the cooling fan relay and water temperature sensor, and check for separated connector or severed wire between the cooling fan ...

Inspection procedure
Hint: if different dtcs related to different systems that have terminal e2 as the ground terminal are output simultaneously, terminal e2 may be open. Read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malf ...

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