LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Ford >> 1991 >> Probe GL, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Diagnostic Procedures >> Throttle Position Sensor (TPS) Adjustment >> Except 1.8L With Manual Transmission
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Except 1.8L With Manual Transmission

  1. Connect Breakout Box (T83L-50-EEC-IV), leaving ECA disconnected. Connect digital voltmeter positive lead to pin No. 47 and negative voltmeter lead to pin No. 46. Turn ignition on. Check voltmeter reading. See TPS VOLTAGE SPECIFICATIONS table.
  2. If voltage is not as specified, ensure throttle stop screw and linkage are adjusted correctly. Remove sensor and check for damaged, corroded or misadjusted pins. If okay, install sensor. Ensure sensor is seated correctly. Repeat step 1). If voltage is not as specified, perform KOEO test. See the appropriate TESTS W/CODES article in this section.
TPS VOLTAGE SPECIFICATIONS (1)

Application Idle Wide Open Throttle
1.8L Auto. Trans. .99 4.02
1.9L 0.34 4.84
2.2L .99 4.02
2.3L HSC 0.20 4.84
2.3L OHC 0.34 4.84
2.5L 0.39 4.84
3.0L (SHO) 0.23 4.89
3.0L (Except SHO) 0.33 4.87
3.8L & 4.6L 0.39 4.84
5.0L 0.39 4.84
5.0L (2) 0.20 4.84
(1) Minimum and maximum specifications are given.
(2) Vehicles equipped with mass airflow sensor only.