Throttle Position Sensor: Adjustments

Fig. 23 Connecting tool No. MD998459.:

Fig. 24 Grounding 1 pin connector.:

IDLE SPEED CONTROL & THROTTLE POSITION SENSOR
1. Start and run engine at fast idle to bring coolant to normal operating temperature (185 to 205°F), then turn ignition ``Off.''
2. Ensure all lights, accessories and electric cooling fan are ``Off,'' then place transaxle selector lever in Neutral position.
3. Place steering wheel in a straight ahead position.
4. Loosen accelerator cable, then disconnect TPS connector. Connect tool harness, tool No. MD998459, between detached connectors as shown, Fig. 23, then connect a suitable ohmmeter between blue and black terminals of tool.
5. Insert a paper clip into 1 pin connector on harness, then connect a suitable RPM gauge as shown, Fig. 24.
6. Turn ignition switch ``On,'' then hold switch in that position for approximately 15 seconds and check that ISC motor is in its initial position (idle point). Turn ignition switch to ``Lock'' position, then disconnect ISC servo connector, then ensure ISC motor is in initial position.
7. Open throttle valve halfway tow or three times, then release to allow it to snap closed. Loosen fixed SAS.
8. Start and idle engine, then check idle speed. Idle speed should be 750 RPM.
9. If idle speed is not as specified, adjust ISC adjusting screw until specified idle speed is obtained. When rotating ISC adjusting screw, use the appropriate tool and only make adjustments to specifications in the tightening direction.
10. Tighten fixed SAS until engine speed increases, then loosen until engine speed no longer decreases (touch point). Tighten one full turn from touch point, then stop engine.
11. Turn ignition switch ``On,'' then check TPS output voltage. Voltage should be .48 - .52 volts. If voltage is not as specified, loosen TPS mounting screw, then rotate TPS to adjust. Rotating TPS clockwise increases output voltage. After adjustment, tighten mounting screws.
12. Turn ignition switch to ``Lock,'' then adjust accelerator cable.
13. Connect ISC motor connector, then disconnect special tool.
14. Start engine, then check idle speed.
15. Turn ignition switch ``Off,'' then disconnect battery terminal for approximately 5 - 6 seconds to erase malfunction from diagnosis memory.