ACIS Control Circuit: Procedure

WARNING: This page is about a different car, the 2010 Toyota Camry. However, it is still accessible from the selected car via links, so may be relevant.

PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE VSV FOR ACIS)

Connect the Techstream to the DLC3.
Start the engine and turn the Techstream on.

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

Operational noise can be heard.

Result

Result	Proceed to
NG	A
OK	B

B → See step 5

A: Go to next step

CHECK INTAKE AIR CONTROL VALVE (OPERATION)
1. Disconnect the air intake valve connector.
  
  Fig 1: Identifying C48 Air Intake Valve Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Apply battery voltage between the terminals of the air intake valve connector.
3. Check the air intake valve operation.
  OK
  
  Operational noise can be heard.
NG → REPLACE INTAKE AIR SURGE TANK

OK: Go to next step

CHECK HARNESS AND CONNECTOR (VSV FOR ACIS - ECM, VSV FOR ACIS - EFI RELAY)

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

Fig 2: Checking Harness And Connector (VSV For ACIS - ECM, VSV For ACIS - EFI Relay)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Disconnect the VSV for ACIS connector.
Disconnect the ECM connector.

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

Standard resistance (Check for open)

Tester Connections	Condition	Specified Conditions
C48-1 - C55-107 (ACIS)	Always	Below 1 Ω

Standard resistance (Check for short)

Tester Connections	Condition	Specified Conditions
C48-1 or C55-107 (ACIS) - Body ground	Always	10 kΩ or higher

Condition

Reconnect the VSV for ACIS connector.
Reconnect the ECM connector.

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

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

Remove the engine room junction block from the engine room R/B.
Disconnect the VSV connector.

Measure the resistance between the terminals.

Standard resistance (Check for open)

Tester Connections	Condition	Specified Conditions
C48-2 - 1E-6	Always	Below 1 Ω

Reinstall the engine room junction block.
Reconnect the VSV connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK → See step 4

REPLACE ECM. Refer to REMOVAL
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to PROBLEM SYMPTOMS TABLE