Toyota / Mazda 4-Pin 2.2mm A/C Pressure Sensor Waterproof Connector – OEM 6189-0647 / 90980-10934
Direct OEM-specification replacement for the Sumitomo 4-pin waterproof wire harness connector used on air conditioning (A/C) pressure sensors across Toyota, Mazda, and Auman (FAW) platforms. Cross-references Sumitomo / Toyota OEM part numbers 6189-0647 and 90980-10934. Uses the 2.2mm contact series in black nylon and rubber housing with waterproof sealing — designed for A/C pressure switch and sensor applications in the engine bay where moisture and refrigerant exposure are present.
The 4-pin A/C pressure sensor connector is located on the high-pressure or low-pressure side of the A/C refrigerant circuit, in the engine bay. Refrigerant leaks, moisture, and vibration cause the connector terminals to corrode, producing an open circuit at the pressure sensor. A failed A/C pressure sensor connector causes the A/C compressor to shut down (the ECM disables the compressor clutch as a safety measure when pressure sensor data is lost), resulting in no cold air from the A/C system. The fault is often misdiagnosed as a refrigerant leak or compressor failure before the connector is inspected.
| OEM Number | Application |
|---|---|
| 6189-0647 | Sumitomo 4-pin A/C pressure sensor connector (primary) |
| 90980-10934 | Toyota OEM cross-reference |
| Pin | Function | Failure Symptom if Open |
|---|---|---|
| 1 | 5V reference supply from ECM | Sensor inoperative, A/C compressor disabled |
| 2 | Ground / earth | Sensor inoperative |
| 3 | Pressure signal output to ECM | A/C compressor shut down, no cold air |
| 4 | Temperature signal (combined sensor variants) | A/C system fault |
| Attribute | Detail |
|---|---|
| Pin Count | 4-Pin |
| Contact Series | 2.2mm pitch (Sumitomo series) |
| Housing Material | Nylon and rubber (waterproof) |
| Housing Colour | Black |
| Sealing | Waterproof |
| OEM Part Numbers | 6189-0647 / 90980-10934 |
| Applications | A/C pressure sensor, A/C pressure switch, refrigerant pressure transducer |
| Compatible Models | Toyota Corolla / Camry / RAV4 / HiAce; Mazda 3 / 6 / CX-5; Auman (FAW) trucks |
| Terminal Included | Yes |
Q: My Toyota A/C stopped working and the compressor clutch is not engaging — could it be the pressure sensor connector?
A: Yes. A corroded or open 4-pin A/C pressure sensor connector is a common cause of A/C compressor shutdown on Toyota vehicles. The ECM disables the compressor clutch when pressure sensor data is lost as a safety measure. Inspect the connector before recharging the refrigerant or replacing the compressor.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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