Dtc P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

Engine. Camry. Acv40 Gsv40
2Gr-Fe Engine Control System. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER

CHECK INTAKE AIR CONTROL VALVE (OPERATION)

CHECK HARNESS AND CONNECTOR

DTC P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)


DESCRIPTION

This circuit opens and closes the Intake Air Control Valve (IACV) in response to changes in the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).
When the engine speed is between 0 and 4,450 rpm and the throttle valve opening angle is 60° or more, the ECM supplies current to the VSV (ON status), to close the IACV. Under other conditions, the VSV is usually OFF and the IACV is open.

Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)


DTC No.
DTC Detection Condition
Trouble Area
P0660
The following conditions are met simultaneously for 0.5 seconds or more (2 trip detection logic):
  1. Voltage of terminal ACIS of the ECM is low when the VSV is OFF
  2. The engine has been started
  1. Open or short in intake manifold tuning valve control circuit
  2. Surge tank (intake air control valve)
  3. ECM

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

  1. Connect the intelligent tester to the DLC3.

  1. Start the engine and turn the tester on.

  1. Select the following menu items: Powertrain / Engine / Active Test / Active the VSV for Intake Control.

  1. Check if operating noise can be heard when operating the air intake control valve using the intelligent tester.

    OK:
    Operating noise can be heard.


OK
CHECK FOR INTERMITTENT PROBLEMS
NG


2.CHECK INTAKE AIR CONTROL VALVE (OPERATION)

  1. Disconnect the C48 air intake valve connector.

  1. Apply battery voltage between the terminals of the intake air control valve connector.

  1. Check intake air control valve operation.

    OK:
    Operating noise can be heard.


NG
REPLACE INTAKE AIR CONTROL VALVE
OK


3.CHECK HARNESS AND CONNECTOR


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P0660 Intake Manifold Tuning Valve Control Circuit / Open (Bank 1)

  1. Check the wire harness and connectors between the VSV for ACIS and ECM.

    1. Disconnect the C48 VSV for ACIS connector.

    2. Disconnect the C58 (RHD) or C55 (LHD) ECM connector.

    3. Measure the resistance between the terminals of the VSV for ACIS connector and ECM connector.

      Standard resistance (Check for open):
      RHD:
      Tester Connection
      		Specified Condition
      VSV for ACIS (C48-1) - ACIS (C58-107)
      		Below 1 Ω
      LHD:
      Tester Connection
      		Specified Condition
      VSV for ACIS (C48-1) - ACIS (C55-107)
      		Below 1 Ω

      Standard resistance (Check for short):
      RHD:
      Tester Connection
      		Specified Condition
      VSV for ACIS (C48-1) or ACIS (C58-107) - Body ground
      		10 kΩ or higher
      LHD:
      Tester Connection
      		Specified Condition
      VSV for ACIS (C48-1) or ACIS (C55-107) - Body ground
      		10 kΩ or higher

    4. Reconnect the VSV for ACIS connector.

    5. Reconnect the ECM connector.

  1. Check the EFI No. 3 fuse.

    1. Remove the EFI No. 3 fuse from the engine room R/ B.

    2. Measure the EFI No. 3 fuse resistance.

      Standard resistance:
      Below 1 Ω

    3. Reinstall the EFI No. 3 fuse.

  1. Check the wire harness between the VSV for ACIS connector and EFI MAIN relay.

    1. Remove the engine room junction block from the engine room R/B.

    2. Disconnect the C48 VSV connector.

    3. Measure the resistance between the terminals.

      Standard resistance:
      Check for open:
      Tester Connection
      		Specified Condition
      VSV for ACIS (C48-2) - 1E-6
      		Below 1 Ω

    4. Reinstall the engine room junction block.

    5. Reinstall the VSV connector.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM (CAMRY_ACV40 RM0000022NT01EX.html)