Sfi System - Acis Control Circuit
DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST USING GTS (OPERATE VACUUM SWITCHING VALVE FOR ACIS)
CHECK VACUUM HOSES (VACUUM SWITCHING VALVE (FOR ACIS) - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD)
INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE)
INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS)
CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR ACIS) - ECM AND NO. 1 INTEGRATION RELAY)
SFI SYSTEM - 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
Refer to DTC P0660 ().
INSPECTION PROCEDURE
- Inspect the fuses for circuits related to this system before performing the following inspection procedure.
| 1.PERFORM ACTIVE TEST USING GTS (OPERATE VACUUM SWITCHING VALVE FOR ACIS) |
Disconnect the vacuum hose from port F on the vacuum switching valve (for ACIS).
Connect the GTS to the DLC3.
Enter the following menus: Powertrain / Engine and ECT / Active Test / Activate the VSV for Intake Control.
Operate the vacuum switching valve for ACIS.
Check the vacuum switching valve air flow when switching the vacuum switching valve.
- OK:
| Test Condition | Specified Condition |
| Vacuum switching valve is ON | Air from port E flows out through port F |
| Vacuum switching valve is OFF | Air from port E flows out through air filter |
Text in Illustration| *a | VSV is ON |
| *b | VSV is OFF |
| *c | Air |
| 2.CHECK VACUUM HOSES (VACUUM SWITCHING VALVE (FOR ACIS) - INTAKE AIR CONTROL VALVE, INTAKE MANIFOLD) |
| | REPAIR OR REPLACE VACUUM HOSES |
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| 3.INSPECT INTAKE MANIFOLD (INTAKE AIR CONTROL VALVE) |
Inspect the intake air control valve ().
| | REPLACE INTAKE MANIFOLD ()
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| OK | |
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| PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| 4.INSPECT VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) |
Inspect the vacuum switching valve assembly (for ACIS) ().
| | REPLACE VACUUM SWITCHING VALVE ASSEMBLY (FOR ACIS) ()
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| 5.CHECK HARNESS AND CONNECTOR (VACUUM SWITCHING VALVE (FOR ACIS) - ECM AND NO. 1 INTEGRATION RELAY) |
Disconnect the vacuum switching valve (for ACIS) connector.
Disconnect the ECM connector.
Remove the No. 1 integration relay from the engine room relay block.
Disconnect the No. 1 integration relay connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
for RHD| Tester Connection | Condition | Specified Condition |
| C129-2 - C46-62 (ACIS) | Always | Below 1 Ω |
| C129-1 - 1B-4 | Always | Below 1 Ω |
| C129-2 or C46-62 (ACIS) - Body ground | Always | 10 kΩ or higher |
| C129-1 or 1B-4 - Body ground | Always | 10 kΩ or higher |
for LHD| Tester Connection | Condition | Specified Condition |
| C129-2 - C45-62 (ACIS) | Always | Below 1 Ω |
| C129-1 - 1B-4 | Always | Below 1 Ω |
| C129-2 or C45-62 (ACIS) - Body ground | Always | 10 kΩ or higher |
| C129-1 or 1B-4 - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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