Operation CHARM: Car repair manuals for everyone.
Home >> Toyota >> 2010 >> Tundra 2WD V8-5.7L (3UR-FE) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> ACIS Control Circuit
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

ACIS Control Circuit





3UR-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: ACIS Control Circuit
- ACIS Control Circuit

DESCRIPTION

This circuit opens and closes the Intake Air Control Valve (IACV) in response to the engine load in order to increase the intake efficiency (ACIS: Acoustic Control Induction System).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (OPERATE VSV FOR ACIS)





(a) Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).

(b) Connect the Techstream to the DLC3.

(c) Start the engine.

(d) Enter the following menus: Powertrain / Engine and ECT / Active Test / Active the VSV for Intake Control.

(e) Operate the VSV for ACIS.

(f) Check the VSV air flow when switching the VSV.

OK:





NG -- INSPECT VACUUM SWITCHING VALVE
OK -- Continue to next step.

2. CHECK VACUUM HOSES (VACUUM SWITCHING VALVE - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD)

NG -- REPAIR OR REPLACE VACUUM HOSES
OK -- Continue to next step.

3. INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)

(a) Inspect the intake air control valve Testing and Inspection.

NG -- REPLACE INTAKE MANIFOLD Removal

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures

4. INSPECT VACUUM SWITCHING VALVE

(a) Inspect the vacuum switching valve Variable Induction Control Solenoid.

NG -- REPLACE VACUUM SWITCHING VALVE Removal
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE - ECM AND INTEGRATION RELAY)





(a) Remove the EFI NO. 2 fuse from the engine room relay block.

(b) Check the EFI NO. 2 fuse.

(c) Measure the resistance according to the value(s) in the table below.

Standard resistance:





(d) Reinstall the EFI NO. 2 fuse.

(e) Disconnect the D62 intake air control valve connector.

(f) Disconnect the D74 ECM connector.

(g) Remove the integration relay from the engine room relay block .

(h) Disconnect the 1B integration relay connector.

(i) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE ECM Removal
pro multis · About Operation CHARM