Throttle Position Sensor: Testing and Inspection

Fig. 120 Deceleration control system.:

1. Connect tool 499200162 or equivalent between wiring harness and engine control unit.
2. Warm engine to operating temperature and run at idle.
3. Set 3C and 3E positions on tool.
NOTE: 3C is for injector Nos. 2 and 4 and 3E is for injector Nos. 1 and 3.
4. Ensure both indicator lamps flash at idle.
5. Increase engine speed to 4000 RPM, then suddenly decrease engine speed.
6. Ensure only the red indicator lamp illuminates during deceleration.