Throttle Positioner: Tercel
- With engine at normal operating temperature, connect tachometer to engine. See Figure. Disconnect and plug vacuum hose "A" to throttle positioner diaphragm and EGR valve. See Fig 1.
- Place throttle positioner on 1st step. Start engine and check engine speed with cooling fan off and transaxle in Neutral.
- Engine speed should be within specification. See THROTTLE POSITIONER SPECIFICATIONS table. Rotate throttle positioner adjusting screw to obtain correct engine speed.
- Reconnect vacuum hose "A" and disconnect and plug vacuum hose "B". Place throttle positioner on 2nd step and ensure engine speed is within specification. See THROTTLE POSITIONER SPECIFICATIONS table. Adjust if necessary. Reconnect all vacuum hoses.
THROTTLE POSITIONER SPECIFICATIONS
| Application | Speed (RPM) |
|---|---|
| 1st Step | 1100 |
| 2nd Step | 1800-2200 |