Inspection & Adjustment
- Warm engine to normal operating temperature. Remove throttle body air inlet hose. Disconnect TPS connector. Install Test Harness (49 G018 901) between TPS and harness.
- Turn ignition on. Ensure throttle valve is fully closed. Using a voltmeter capable of measuring voltage variations of .01 volt, measure voltage at Red and Black wires of test harness. See Fig 1 & Fig 2 .
- If voltage is 4.5-5.5 volt at Red wire, and about zero volt at Black wire, go to next step. If voltages are not as specified, check battery voltage and wiring harness between Electronic Control Unit (ECU) and TPS. If battery voltage and harness are okay, replace ECU.
- Record voltage at Red wire. Measure voltage at Blue wire of test harness with throttle valve at different positions within its entire range. See TPS VOLTAGE (B2200 PFI, B2600i, MPV 2.6L, MX-6 & 626) table.
- If measured voltages do not match voltages specified, loosen TPS screw. Rotate TPS until Blue wire voltage is as specified. Tighten TPS screw. If TPS cannot be adjusted to specification, replace TPS. Disconnect negative battery cable and apply brake pedal for 5 seconds to erase ECU memory.
- If measured voltages increase smoothly and match voltages specified, turn ignition off. Disconnect test harness. Reconnect TPS connector. Disconnect negative battery cable and apply brake pedal for 5 seconds to erase ECU memory.
TPS VOLTAGE (B2200 PFI, B2600i, MPV 2.6L, MX-6 & 626)
| Red Wire Volts | Blue Wire Volts Closed Throttle | Blue Wire Volts WOT |
|---|---|---|
| 4.50-4.59 | .37-.54 | 3.58-4.23 |
| 4.60-4.69 | .38-.55 | 3.66-4.32 |
| 4.70-4.79 | .39-.56 | 3.74-4.41 |
| 4.80-4.89 | .40-.57 | 3.82-4.51 |
| 4.90-4.99 | .40-.58 | 3.90-4.60 |
| 5.00-5.09 | .41-.60 | 3.97-4.70 |
| 5.10-5.19 | .42-.61 | 4.05-4.79 |
| 5.20-5.29 | .43-.62 | 4.13-4.88 |
| 5.30-5.39 | .44-.63 | 4.21-4.98 |
| 5.40-5.49 | .44-.64 | 4.29-5.07 |
| 5.50 | .44-.66 | 4.29-5.17 |