Fuel Rack Position Sensor
- With engine off, turn safety sleeve of sensor counterclockwise. Disconnect connector on injection pump. Connect multimeter and set to ohm scale. Probe and check resistance of terminals No. 1 and 2. Resistance should be 23-27 ohms.
- Probe terminals No. 1 and 3. Resistance should be 23-27 ohms. Probe terminals No. 2 and 3. Resistance should be 46-54 ohms. If resistance is not to specification on any resistance tests, replace injection pump. If resistance was to specification on all tests go to next step.
- With engine off and ignition on, set multimeter to volts scale. Check voltage between terminals No. 1 and 2 on fuel rack position sensor connector. Voltage reading should be 10 volts. If voltage reading is 10 volts, testing is complete.
- If voltage reading is not 10 volts, repair open circuit. If no open circuit is found, replace EDS control unit. See Fig 1 .