Toyota 30-Pin Automatic Transmission Wire Harness Connector – Female OEM

Toyota’s larger automatic transmissions – including the A750E, A760E, A960E, and similar units used in Camry, Highlander, Land Cruiser, and Lexus platforms – use a high-density 30-pin connector to interface the transmission control module (TCM) with the valve body solenoids, speed sensors, and fluid temperature sensor in a single harness connection. This 30-pin female connector is the primary TCM interface for these transmissions, carrying all solenoid control, sensor, and communication circuits through one connector. Available bare or with 15cm pre-wired leads.

Key Specifications

Why a 30-Pin Connector Requires Extra Care

A 30-pin connector carries a large number of circuits in a compact housing – on Toyota transmissions, this includes up to 5 shift solenoids, 2 pressure control solenoids, input and output speed sensors, fluid temperature sensor, and TCM power/ground circuits. When this connector degrades, the failure pattern is often complex: multiple solenoid circuits fail simultaneously, causing the TCM to log P0750–P0770 (shift solenoid A–E), P0745 (pressure control solenoid), and P0711 (fluid temperature sensor) at the same time. This multi-code pattern is frequently misdiagnosed as a failed mechatronic unit or valve body – but in many cases, the root cause is a single corroded 30-pin connector. Always inspect and replace the connector before condemning the transmission.

Variant Guide

• Female – Bare 30-pin housing with terminals
• Female 15CM – Pre-wired with 15cm leads for direct splice-in installation

Installation Steps

1. Drain ATF and remove the transmission oil pan to access the solenoid harness
2. Photograph the original 30-pin connector before disassembly – document pin positions
3. Use a terminal extraction tool to remove terminals one-by-one from the original housing
4. Transfer terminals to the new housing maintaining exact pin positions
5. Reinstall the oil pan with a new gasket and refill ATF to Toyota specification
6. Use Toyota Techstream to clear fault codes and perform a transmission adaptation reset

Frequently Asked Questions

Q: What Toyota models use this 30-pin transmission connector?
A: This connector is used on Toyota Camry (V6), Highlander, Land Cruiser, 4Runner, and Lexus ES350, GX460, LS460 with A750E, A760E, A960E, and similar Toyota automatic transmissions. Cross-reference your vehicle’s wiring diagram to confirm fitment.

Q: Can a corroded 30-pin connector cause the transmission to fail completely?
A: Yes. If the TCM loses communication with multiple solenoids simultaneously, it will command the transmission into limp mode (typically 3rd gear only) or prevent engagement entirely. Replacing the connector and performing an adaptation reset often restores full transmission function.

Q: What fault codes indicate a failed 30-pin transmission connector?
A: Common codes include P0750–P0770 (shift solenoid A–E circuit), P0745 (pressure control solenoid A), P0711 (transmission fluid temperature sensor), P0700 (TCM malfunction), and U0101 (lost communication with TCM) on Toyota Techstream.

Q: Are all 30 terminals included?
A: Yes, the connector set includes the housing and all required terminals.

Compatible Applications

• Toyota Camry V6 / Highlander – A750E / A760E transmission harness
• Toyota Land Cruiser / 4Runner – A960E transmission connector
• Lexus ES350 / GX460 / LS460 – TCM interface harness
• Toyota 30-pin automatic transmission applications