Idle-Up System: Tercel

Remove idle-up Vacuum Switching Valve (VSV). Idle-up VSV is center VSV, located near end of valve cover on passenger's side.
NOTE: The idle-up VSV may also be identified using appropriate illustration in THEORY/OPERATION article or wire color. See appropriate wiring diagram in articles listed below:
- WIRING DIAGRAMS Paseo
- WIRING DIAGRAMS Tercel
Using ohmmeter, check resistance and for continuity between idle-up VSV electrical terminals. Replace idle-up VSV if resistance is not 37-44 ohms or continuity does not exist.
Ensure no continuity exists between each electrical terminal and body of idle-up VSV body. To check idle-up VSV operation, apply air pressure to designated area and checking air passage, and then applying battery voltage and ground and retesting. See Fig 1. Replace idle-up VSV if defective.

Fig 1: Testing Idle-Up VSV (Tercel)