Throttle Position (TP) Sensor
| Circuit | Breakout Box Pin No. | PCM Pin | Wire Color |
|---|---|---|---|
| GND | 46 | 3D | Black/Blue |
| TP | 47 | 2F | Yellow |
| VREF | 26 | 2I | Purple |
1) Check System Integrity Visually check all wiring, connectors and components for evidence of damage, shorting or looseness. If fault is found, repair as necessary. If no fault is found, go to next step.
2) Check TP Sensor Signal Turn ignition off. Install breakout box. Install PCM to breakout box. Turn ignition on. Measure voltage at TP test pin at breakout box. Slowly depress accelerator pedal, and compare voltage to specifications shown in VOLTAGE & RESISTANCE SPECIFICATIONS (TP SENSOR) table. If voltage is as specified, and no other problem or code is found, replace PCM. If voltage is not as specified, go to next step.
3) Check VREF Turn ignition off. Disconnect TP sensor connector. Turn ignition on. Measure voltage at VREF terminal of TP sensor connector. See Fig 1. If voltage is 4.5-5.5 volts, go to next step. On all models, if voltage is not 4.5-5.5 volts, go to CIRCUIT TEST VREF.
4) Check Wires To PCM Turn ignition off. With breakout box installed, disconnect PCM. Disconnect TP sensor connector. Measure and record resistances of TP wire between test pins at breakout box and TP sensor connector. See Fig 1. Measure and record resistance between ground and TP test pin at breakout box. If resistances are less than 5 ohms between test pins and TP sensor connector, and more than 10,000 ohms between ground and TP test pin, replace TP sensor. If resistance is not as specified, repair TP wire between TP sensor connector and PCM.
| Throttle Position | (1) Ohms | (1) Volts | ||
|---|---|---|---|---|
| Closed | 0.4 | 0.5 | ||
| 1/4 Open | 0.6 | 1.3 | ||
| 1/2 Open | 1.6 | 2.2 | ||
| 3/4 Open | 2.2 | 2.9 | ||
| Full Open | 3.0 | 3.7 | ||
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