Throttle Position Sensor: Adjustments
FUEL INJECTION PUMP LEVER (FIPL) SENSOR OPERATIONAL CHECK AND ADJUSTMENTTop View of Fuel Pump:
To check the Fuel Injection Pump Lever (FIPL) sensor for proper operation and to make any adjustments the engine must not be running (TURNED OFF). Refer to the Top View of Fuel Pump, the Throttle Side View, and the Fuel Injection Pump Lever Side View images.
1. Perform Key-On-Engine-Off On-Board Diagnostic and wait for all the service codes to be issued. If any error codes are present SEE Powertrain Management/Computers and Control Systems/System Diagnosis/Procedures and correct as required, and restart this procedure.
NOTE: The throttle must be held to the floor, during Key-On-Engine-Off On-Board Diagnostic until the codes have begun to issue from the Self-Test Automatic Readout (STAR) Tester.
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 STAR Tester to be used as an "audible guide" in setting the FIPL sensor.
3. Remove the throttle cable from the throttle lever on the right side of the fuel injection pump.
NOTE: The STAR Tester remains in the adjustment mode for only 10 minutes, steps 3-6 must be completed within this time period.
4. Remove the throttle return spring. Install one end of the spring over the throttle lever ball stud and the other end over the throttle cable support bracket.
Throttle Side View:
5. Insert Gauge Block T92T-7B200-AH between the gauge boss and the maximum throttle travel screw as shown in the Throttle Side View image. The throttle return spring, as repositioned in the above step, will hold the throttle lever open against the gauge block.
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.
Fuel Injection Pump Lever Side View:
a. To adjust, loosen the two screws that attach the FIPL sensor to the mounting bracket as shown in the Fuel Injection Pump Lever Side View image.
b. Rotate the FIPL sensor until a steady tone is heard from the STAR Tester. If the setting is too low the STAR Tester will issue a slow beep, if the setting is too high the STAR Tester will issue a fast beep.
c. Once a steady tone is heard, tighten the attaching screws to 8-10.5 Nm (75-90 in lb).
d. 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 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 10 minute time limit has been exceeded and the STAR tester 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.