Toyota 2-Pin A/C Pressure Valve / Switch / Sensor Waterproof Connector – OEM 6189-0533
Direct OEM-specification replacement for the Sumitomo 2-pin waterproof wire harness connector used on air conditioning pressure switches, pressure valves, and sensor harnesses across Toyota platforms. Cross-references Sumitomo / Toyota OEM part number 6189-0533. Grey nylon and rubber housing with waterproof sealing — designed for the high-pressure, high-temperature environment of the A/C compressor and refrigerant circuit.
The A/C pressure switch connector on Toyota vehicles is located on the high-pressure side of the refrigerant circuit, near the compressor or condenser. Exposure to engine heat, refrigerant oil mist, and vibration causes the connector locking tab to fracture and the terminals to corrode. A failed A/C pressure switch connector causes the ECM to lose the refrigerant pressure signal, triggering A/C compressor cut-out as a safety measure — the system shuts down to prevent compressor damage from operating at incorrect pressures. This is frequently misdiagnosed as a failed A/C compressor or low refrigerant charge.
| OEM Number | Application |
|---|---|
| 6189-0533 | Toyota A/C pressure switch / valve / sensor connector |
| Pin | Function | Failure Symptom if Open |
|---|---|---|
| 1 | Pressure switch signal to ECM | A/C compressor cut-out, no cooling |
| 2 | Ground / power supply | Pressure signal lost, A/C fault code |
| Attribute | Detail |
|---|---|
| Pin Count | 2-Pin |
| Housing Material | Nylon and rubber (waterproof) |
| Housing Colour | Grey |
| Sealing | Waterproof |
| OEM Part Number | 6189-0533 |
| Applications | A/C pressure switch, pressure valve, refrigerant pressure sensor |
| Compatible Brands | Toyota (Sumitomo platform) |
| Terminal Included | Yes |
Q: My Toyota A/C stopped working and the compressor won’t engage — could it be the connector?
A: Yes. A corroded or open A/C pressure switch connector is a common cause of compressor cut-out on Toyota vehicles. The ECM disables the compressor when it loses the pressure signal as a safety measure. Check the refrigerant charge first — if it is within specification, inspect the 2-pin pressure switch connector before replacing the compressor or pressure switch.
Q: Are terminals included?
A: Yes, terminals are included with all variants.
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2 Pin Connectors
