Acoustic Control Induction System Vacuum Switching Valve: Celica
NOTE:
Acoustic Control Induction System (ACIS) Vacuum Switching Valve (VSV) may also be referred to as intake air control valve system VSV.
- Remove necessary components for access to ACIS VSV. ACIS VSV is located on bottom of air cleaner case. See Fig 1.
- Remove ACIS VSV. Using ohmmeter, ensure continuity exists between electrical terminals on ACIS VSV and that resistance is 37-44 ohms at 68°F (20°C). Replace ACIS VSV if no continuity exists or resistance is not within specification.
- Using ohmmeter, ensure no continuity exists between each electrical terminal and body of ACIS VSV. Replace ACIS VSV if continuity exists between electrical terminal and body of ACIS VSV.
- To test ACIS VSV operation, apply air pressure to port "E". Ensure air flows from port "G". Perform STEP 1 in illustration. See Fig 2.
- Apply battery voltage and ground to electrical terminals on ACIS VSV. Apply air pressure to port "E". Ensure air flows from port "F" and not from port "G". Perform STEP 2 in illustration. See Fig 2. Replace ACIS VSV if defective. Reinstall ACIS VSV.
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