Dtc P1660 Vsv For Aicvs Circuit

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSV FOR AICV)

CHECK VSV ASSEMBLY (FOR ACIV)

CHECK HARNESS AND CONNECTOR (VSV FOR AICV - EFI MAIN RELAY)

INSPECT VACUUM TANK

DTC P1660 VSV for AICVS Circuit


DESCRIPTION

The air cleaner is equipped with two inlets, one of which is opened or closed by the Air Intake Control Valve (AICV). This system reduces intake noise and increases engine power at low to high engine speed range.
When the engine is operating in the low-to-mid speed range, this control operates the AICV to close one of the air cleaner inlets. When the engine speed is more than 3,600 rpm and the opening angle of the throttle valve is more than 60°, the ECM activates the VSV and opens the AICV.

Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P1660 Vsv For Aicvs Circuit


DTC No.
Detection Condition
Trouble Area
P1660
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 air intake control valve circuit
  2. Air intake control valve
  3. ECM

WIRING DIAGRAM


Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P1660 Vsv For Aicvs Circuit


INSPECTION PROCEDURE

1.PERFORM ACTIVE TEST USING INTELLIGENT TESTER (VSV FOR AICV)


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P1660 Vsv For Aicvs Circuit

  1. Turn the ignition switch to the ON position and turn the intelligent tester ON.

  1. Select the following menu items: Powertrain / Engine / Active Test / Active the VSV for ACIS and operate the VSV for AICV.

  1. Check the operation of the VSV when the VSV is operated by the intelligent tester.

    Standard:
    Tester Operation
    		Specified Condition
    VSV is ON
    		Air from port E flows out through port F
    VSV is OFF
    		Air from port E flows out through the air filter


OK
Go to step 4
NG


2.CHECK VSV ASSEMBLY (FOR ACIV)

  1. Inspect the intake air control valve assembly (CAMRY_ACV40 RM000001IRQ007X.html).



NG
REPLACE INTAKE AIR CONTROL VALVE
OK


3.CHECK HARNESS AND CONNECTOR (VSV FOR AICV - EFI MAIN RELAY)


    Camry. Acv40 Gsv40.2Gr-Fe Engine Control System.Sfi System. Dtc P1660 Vsv For Aicvs Circuit

  1. Check the wire harness between the VSV for AICV connector and the ECM connector.

    1. Disconnect the A53 VSV for AICV connector.

    2. Disconnect the A24 (RHD) or A55 (LHD) ECM connector.

    3. Measure the resistance between the terminals of the wire harness side connectors and body ground.

      Standard resistance (Check for open):
      RHD:
      Tester Connection
      		Specified Condition
      VSV for AICV (A53-2) - ACIV (A24-4)
      		Below 1 Ω
      LHD:
      Tester Connection
      		Specified Condition
      VSV for AICV (A53-2) - ACIV (A55-4)
      		Below 1 Ω

      Standard resistance (Check for short):
      RHD:
      Tester Connection
      		Specified Condition
      VSV for AICV (A53-2) or ACIV (A24-4) - Body ground
      		10 kΩ or higher
      LHD:
      Tester Connection
      		Specified Condition
      VSV for AICV (A53-2) or ACIV (A55-4) - Body ground
      		10 kΩ or higher

  1. Check the EFI No. 3 fuse.

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

    2. Measure the resistance of the EFI No. 3 fuse.

      Standard resistance:
      Below 1 Ω

    3. Reinstall the EFI No. 3 fuse.

  1. Check the wire harness between the VSV for AICV and the EFI relay.

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

    2. Measure the resistance between the terminals of the wire harness side connectors.

      Standard resistance:
      Check for open:
      Tester Connection
      		Specified Condition
      VSV for AICV (A53-1) - 1E-6
      		Below 1 Ω

    3. Reconnect the VSV for AICV connector.

    4. Reinstall the engine room junction block.



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT VACUUM TANK

  1. Inspect the vacuum tank (CAMRY_ACV40 RM000001IRN004X_01_0002.html).



NG
REPAIR OR REPLACE AIR CLEANER CAP
OK

REPLACE ECM (CAMRY_ACV40 RM0000022NT01EX.html)