DQ14 - Check TP Sensor Adjustment

NOTE: Two people are required to perform this procedure.

- Perform Key On Engine Off (KOEO) self test while holding the throttle wide open (WOT).

- After the last service code has been displayed, remain in self test.

Fuel Pump:

Fuel Pump:

- While in self test, place a 0.515 inch gauge block (Rotunda T83T-7B200AH between the fuel pump lever travel screw and gauge boss.

- Cycle the Overdrive Cancel Switch (OCS) once.

- Observe Self Test Output (STO) of the scanner for:

- A constant tone, solid light, or "STO LO" readout means the Throttle Position (TP) sensor adjustment is within range. Cycle the OCS to get out of test.

- A beeping tone, flashing light, or "STO LO" erratic readout (4 per second) indicates adjustment is required.

- A beeping tone, flashing light, or "STO LO" erratic readout (1 per second) indicates adjustment is required.

- If signal is undetectable, the TP sensor may have a worn internal substrate. Check for this by moving the throttle and observing signal.

Fuel Pump:

- If adjustment is required, proceed as follows:

- If TP sensor and bracket screws are tight and there are no signs of wear between mounted parts, loosen TP sensor attachment screws and rotate sensor until a constant signal is received. Tighten TP sensor screws and remove gauge block. Repeat quick test.

- If bracket shows signs of wear due to movement or vibration, remove epoxy from TP sensor bracket screw heads. Loosen those screws and turn TP sensor/bracket assembly to get within range, then tighten screws and apply epoxy to the screw heads. Remove gauge block and repeat quick test.