Diesel Governor Control Lever Position Sensor: Testing and Inspection

Top View Of Fuel Pump:

To check the Fuel Injection Pump Lever (FIPL) sensor (automatic transmissions only) for proper operation and to make any adjustments the engine must not be running (OFF).

1. Perform Key-On-Engine-Off Self-Test and wait for all the service codes to be issued. If any error codes are present, refer to Computers and Control Systems and correct the codes as required, then restart this procedure.

NOTE: The throttle must be held to the floor during Key On Engine Off (KOEO) self test until the codes have begun to issue from the scan tool.

2. After the last service code has been issued, press the Overdrive Cancel Switch (OCS), this will initiate the FIPL adjustment mode and allow the scan tool to be used as an "audible guide" in setting the FIPL sensor.

NOTE: The scan tool remains in the adjustment mode for only ten (10) minutes, steps 3-6 must be completed within this time period.

3. Remove the throttle cable from the throttle lever on the right side of the fuel injection pump.
4. Remove the throttle return spring and hold throttle lever open.

Throttle Side View:

5. Insert the gauge block, T83-78200-AH (0.515 inch), between the gauge boss and the maximum throttle travel screw.

Fuel Injection Pump Lever Side View:

6. The FIPL sensor bracket is permanently attached to the pump with tamper proof screws. Movement of the bracket is not intended as a means for adjustment. If required, adjustment of the FIPL sensor may be accomplished by utilizing the clearance between the sensor to bracket screws and the sensor.
To adjust, loosen the two screws that attach the FIPL sensor to the mounting bracket. Rotate the FIPL sensor until a steady tone is heard from the scan tool. If the setting is too low the scan tool will issue a slow beep, if the setting is too high the scan tool will issue a fast beep. Once a steady tone is heard, tighten the attaching screws to 75-90 in lb (8-10.5 Nm). If the FIPL sensor cannot be adjusted to obtain a steady tone, replace the FIPL sensor and repeat this procedure from Step 1.
7. Remove the gauge block. Cycle the throttle lever from idle to Wide Open Throttle (WOT) 5 times. Reinsert the gauge block to verify the setting. If the tone is not steady then readjustment is necessary. Repeat this procedure from Step 6.
It is important that the FIPL sensor be set to the correct position (a steady tone). If the sensor setting is too low (a slow beep) the shifts will be firmer and more delayed than normal; if it is too high (a fast beep) the shift will be smoother and earlier than normal.

NOTE: If the ten (10) minute time limit has been exceeded and the scan tool tone has shut off, repeat this procedure from Step 1.

8. Remove the gauge block. Reattach the throttle return spring and throttle cable in the proper locations.
9. Start the engine. Check throttle operation and transmission shift scheduling and quality.