Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1990626 LX, 4D HATCHBACK, 2.2 1, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCEENGINE CONTROLS - SPECIFICATIONSFUEL SYSTEMTHROTTLE POSITION SENSOR (TPS)
1990 Mazda 626 LX, 4D Hatchback, 2.2 1, Automatic
Throttle Position Sensor (TPS)
1990 Mazda 626 LX, 4D Hatchback, 2.2 1, AutomaticSECTION Throttle Position Sensor (TPS)
NOTE:
On RX7, see ADJUSTMENTS
article for TPS specifications.
TPS VOLTAGE - B2200 (PFI), B2600i, MPV (4-CYL.), MX-6 & 626
| RED Wire Voltage | BLUE Wire Voltage Closed Throttle | BLUE Wire Voltage Wide Open Throttle |
|---|---|---|
| 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 |
TPS CONTINUITY TEST
| Condition (1) | Continuity Between IDL & "E" | ||
|---|---|---|---|
| .004" (.1 mm) | Yes | ||
| .024" (.6 mm) | No | ||
|
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TPS INSPECTION
| Condition (1) | Continuity Between IDL & "E" | Continuity Between POW & TL | |||
|---|---|---|---|---|---|
| Miata | |||||
| .016" (.4 mm) | Yes | No | |||
| .027" (.7 mm) | No | No | |||
| Wide Open Throttle | No | Yes | |||
| Protege & 323 | |||||
| .004" (.1 mm) | Yes | No | |||
| .039" (1.0 mm) | No | No | |||
| Wide Open Throttle | No | Yes | |||
|
|||||
TPS RESISTANCE
| Application | Ohms | ||
|---|---|---|---|
| MPV (V6) & 929 (SOHC) | |||
| Terminals "A" & "D" | 3500-6500 | ||
| Terminals "B" & "D" | |||
| Closed Throttle | 300-1000 | ||
| Wide Open Throttle | 3500-6500 | ||
| 929 (DOHC) | |||
| Terminals "A" & "D" | 3000-6000 | ||
| Terminals "B" & "D" | |||
| Closed Throttle | 200-600 | ||
| Wide Open Throttle | 3300-7000 | ||
TPS ADJUSTMENT TESTS
| Condition (1) | Continuity Between "C" & "D" | |||
|---|---|---|---|---|
| MPV (V6) & 929 (SOHC) | ||||
| .02" (.5 mm) | Yes | |||
| .028" (.7 mm) | No | |||
| 929 (DOHC) | ||||
| .004" (.1 mm) | Yes | |||
| .012" (.3 mm) | No | |||
|
||||
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.