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Dashpot Control System (1.6L)

  1. Engine must be at normal operating temperature. Check idle speed and adjust if necessary. Remove cap, filter and separator from dashpot. See Fig 1.
  2. Start engine. Maintain engine speed at specified testing RPM. See DASHPOT TESTING RPM  table. Plug Vacuum Transmitting Valve (VTV) hole with your finger. See Fig 1.
  3. Release throttle. Dashpot should be extended and dashpot setting RPM should be as specified. See DASHPOT TESTING RPM  table. If idle speed is incorrect, adjust dashpot. See Fig 2.
  4. To check VTV operation, run engine at dashpot testing RPM for a few seconds. Plug the VTV hole with your finger. Release throttle. Uncover plugged hole. Engine should return to idle in about one second.
  5. Install dashpot separator, filter and cap. Install filter with coarser surface facing outward.
DASHPOT TESTING RPM (1.6L)

Model Testing RPM (1) Setting RPM: Dashpot
A/T 3000 2200
M/T 3000 1800
(1) With cooling fan off.
Fig 1: Exploded View of Dashpot (1.6L)
G118991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Adjusting Dashpot Idle Speed (1.6L)
G118992Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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