4-Pin Denso Alternator Voltage Regulator Connector – OEM 6189-0694 / 90980-11964

Direct-fit replacement for the Denso alternator voltage regulator connector used on Honda, Acura, and Toyota D4D diesel engines. Cross-references OEM part numbers 6189-0694 (Yazaki housing) and 90980-11964 (Toyota OEM). This connector interfaces between the alternator's internal voltage regulator and the vehicle's charge control circuit – a critical link in the charging system.

Key Specifications

• OEM Part Numbers: 6189-0694 / 90980-11964
• Pin Count: 4
• Gender: Female (with wire)
• Wire Gauge: 18 AWG (0.5 mm²)
• Wire Length: 5.5 inches (140 mm)
• Housing Material: PA66 glass-filled nylon
• Terminal Material: Copper alloy, tin-plated
• Voltage Rating: 12V / 24V DC

Compatible Vehicles

• Honda: Accord, Civic, CR-V, Odyssey, Pilot (various years)
• Acura: MDX, TL, TSX, RDX
• Toyota: Hilux, Land Cruiser, HiAce, Fortuner (D4D diesel engines)
• Cross-reference: Verify with OEM part number 6189-0694 or 90980-11964 before ordering

Why This Connector Fails

The alternator regulator connector is exposed to engine bay heat cycles, vibration, and oil mist. Over time, the terminal contacts develop oxidation and micro-fretting corrosion, increasing contact resistance. Symptoms include:

• Battery warning light (charge system fault)
• Intermittent charging – voltage fluctuates between 11.5V and 14.8V
• P0562 (System Voltage Low) or P0563 (System Voltage High) fault codes
• Alternator output drops under electrical load (headlights, A/C)

Diagnosis Before Replacement

Before replacing the alternator, inspect the regulator connector: measure contact resistance with a multimeter – any reading above 0.3Ω indicates a failing connector. Clean terminals with electrical contact cleaner and apply dielectric grease. If resistance remains high, replace the connector.

Frequently Asked Questions

Q: Is 6189-0694 the same as 90980-11964?
A: Yes. 6189-0694 is the Yazaki manufacturer part number; 90980-11964 is the Toyota OEM catalog number for the same connector. Both refer to the identical 4-pin alternator regulator housing.

Q: Does this fit Denso alternators on non-Toyota/Honda vehicles?
A: Denso supplies alternators to many OEMs. If your alternator uses a 4-pin regulator connector matching the 6189-0694 housing dimensions, this connector will fit. Verify pin count and housing shape before ordering.

Q: What causes the battery light to come on after replacing the alternator?
A: In many cases, the alternator itself is fine but the regulator connector has failed. A corroded or loose 6189-0694 connector will cause the same symptoms as a failed alternator. Always inspect the connector first.

Q: What crimping tool is needed?
A: Use a ratchet crimper for 0.5mm² (18 AWG) Yazaki-series terminals. The Hozan P-706 or Engineer PA-09 are commonly used for this terminal series.

Package Contents

1 × 4-Pin Female Connector (6189-0694 / 90980-11964) with 18 AWG wire and terminal insert