6-Pin 2.2mm Waterproof AC Compressor & Lamp Connector – Toyota OEM 6188-0175 / 6189-0323

Direct-fit replacement for Toyota/Yazaki OEM part numbers 6188-0175 (male housing) and 6189-0323 (female housing), a 6-pin 2.2mm pitch IP68 waterproof connector used for air conditioning compressor clutch, exterior lamp, and lighting harness connections on Toyota vehicles. The 2.2mm pitch Yazaki series is one of the most widely used connector families across Toyota, Lexus, and Daihatsu platforms.

Key Specifications

• OEM Part Numbers: 6188-0175 (male) / 6189-0323 (female)
• Pin Count: 6
• Gender: Male & Female set (with wire)
• Terminal Pitch: 2.2mm (Yazaki series)
• Wire Gauge: 20 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Waterproof Rating: IP68
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Current Rating: Up to 5A per pin

AC Compressor Clutch Pin Assignment (6-Pin)

Note: Pin assignment varies by Toyota model year. Verify with vehicle-specific wiring diagram before installation.

Compatible Toyota Applications

• Toyota Camry (XV40/XV50): AC compressor clutch harness connector
• Toyota Corolla (E140/E150): AC compressor and exterior lamp harness connector
• Toyota RAV4 (XA30/XA40): AC compressor clutch and lighting harness connector
• Toyota Hilux / Land Cruiser: Exterior lamp and AC harness connector

6188 vs 6189 – Male vs Female Yazaki Naming Convention

In Yazaki part numbering, 6188-xxxx = male housing (pin side) and 6189-xxxx = female housing (socket side). This convention is consistent across the entire Yazaki 2.2mm waterproof series. When ordering a replacement, confirm whether you need the male (6188) or female (6189) side of the connector.

Diagnosis – AC Compressor Faults

• AC not engaging (clutch not clicking): Check 12V at Pin 1 with AC on – no voltage indicates relay or fuse fault upstream; voltage present but clutch not engaging indicates clutch coil or connector fault
• Toyota fault codes: B1479 (A/C Pressure Sensor Circuit), P0645 (A/C Clutch Relay Control Circuit) – inspect 6188-0175 / 6189-0323 connector before replacing compressor
• Intermittent AC after rain: Inspect wire seal integrity – moisture ingress at the pressure switch signal pin causes intermittent AC cut-out

FAQ

Q: Is 6188-0175 the male or female connector?
A: 6188-0175 is the male (pin side); 6189-0323 is the female (socket side). This follows the standard Yazaki 6188/6189 naming convention for male/female housings.

Q: Can this connector be used for Toyota lamp harness as well as AC?
A: Yes – the 6188/6189 2.2mm waterproof series is used for both AC compressor and exterior lamp harness connections on Toyota platforms. Confirm the pin count and housing profile match your application.

Package Contents

1 × 6-Pin Male Connector (6188-0175) + 1 × 6-Pin Female Connector (6189-0323), each with 20 AWG wire and terminal insert