INSPECTION
Note. Perform all testing procedures with engine at normal operating temperature.
- Disconnect negative battery cable. Disconnect electrical connector from TP sensor. Loosen TP sensor retaining screws.
- To check proper TP sensor operation, using ohmmeter, check resistance or continuity with selected feeler gauge thickness between throttle lever and stop screw. (Scheme 1)and (Scheme 2). See THROTTLE POSITION (TP) SENSOR RESISTANCE table.
- If TP sensor resistances are not as specified, adjust or replace TP sensor. See PRIZM procedure under ADJUSTMENTS. Once properly adjusted, reconnect electrical connector.
| Application | Ohms |
|---|
| Prizm & Prizm LSi |
| Between Terminals E2 & IDL (3) | 0-2300 |
| Between Terminals E2 & IDL (1) | Infinity |
| Between Terminals E2 & VC | 4000-8500 |
| Between Terminals E2 & VTA (4) | 200-6000 |
| Between Terminals E2 & VTA (2) | 3300-10,000 |
| (1) With .035" (.89 mm) feeler gauge installed between throttle stop screw and lever. (2) Throttle valve at fully open position. (3) With .016" (.40 mm) feeler gauge installed between throttle stop screw and lever. (4) With zero clearance between throttle stop screw and lever. |
| (1) | With .035" (.89 mm) feeler gauge installed between throttle stop screw and lever. |
| (2) | Throttle valve at fully open position. |
| (3) | With .016" (.40 mm) feeler gauge installed between throttle stop screw and lever. |
| (4) | With zero clearance between throttle stop screw and lever. |
THROTTLE POSITION (TP) SENSOR RESISTANCE
Note. Perform all testing procedures with engine at normal operating temperature.
| CAUTION | DO NOT use throttle stop screw to adjust throttle position sensor. |
- Disconnect electrical connector from TP sensor. Loosen TP sensor retaining screws. Insert a.016" (.40 mm) feeler gauge between throttle lever and stop screw. (Scheme 1) On models equipped with throttle opener (California only), disconnect throttle opener vacuum hose from throttle body, and apply vacuum to hose. Connect ohmmeter between TP sensor terminals IDL and E2. (Scheme 2)
- Rotate throttle position sensor fully clockwise, then slowly rotate counterclockwise until ohmmeter indicates continuity. Hold TP sensor and tighten retaining screws. Remove feeler gauge. Ohmmeter should still indicate continuity.
- Insert a.035" (.89 mm) feeler gauge between throttle lever and stop screw. Ohmmeter should indicate no continuity. Remove feeler gauge. Reconnect electrical connector, and reconnect throttle opener vacuum hose to throttle body (if removed).
Scheme 1
Scheme 2
