140-Pin Automotive Waterproof Connector – 1554930-1, Heavy-Duty Plastic Wire Harness Connector

Part number 1554930-1 is a 140-pin heavy-duty waterproof automotive connector from TE Connectivity — one of the highest pin count single connectors used in commercial vehicle applications. 140-pin connectors are used exclusively for the most complex multi-circuit harness interfaces: main ECM connectors on advanced diesel engines (Cummins X15, Detroit DD16, PACCAR MX-13), central gateway module connections, and integrated body control unit connections on modern trucks and buses where consolidating 100+ circuits into a single sealed connector is required.

Key Specifications

• Part Number: 1554930-1
• Manufacturer: TE Connectivity
• Pin Count: 140 pins
• IP Rating: IP67
• Housing Material: Glass-filled nylon (PA66-GF), UL94 V-0
• Operating Temperature: -55°C to +125°C
• Application: ECM main connectors on heavy-duty diesel engines and central gateway modules

140-Pin Connector — Application Context

140-pin connectors represent the upper limit of standard automotive connector pin counts. Applications:

• Heavy-duty diesel ECM: Main ECM connectors on Cummins X15, Detroit DD16, PACCAR MX-13, and Volvo D13 engines — these engines have 100–140+ sensor, actuator, and communication circuits requiring a single high pin count connector
• Central gateway modules: CGM connections on modern trucks with multiple CAN bus networks and gateway circuits
• Integrated body control: Combined BCM/gateway connections on trucks and buses with advanced body electrical systems

Frequently Asked Questions

How do I manage a 140-pin connector repair?

140-pin connector repairs require systematic organization: (1) photograph the connector and all wiring before disassembly; (2) use a scan tool to record all active fault codes; (3) label each wire with its pin number using tape flags — do not rely on wire color alone for 140-pin connectors; (4) extract and replace only the damaged terminals; (5) verify each terminal is fully seated with a pull-test; (6) install the back cover; (7) reconnect and use a scan tool to verify all circuits are functional. For ECM connectors, clear fault codes and perform a complete system check after repair.

What contacts are compatible with 1554930-1?

Cross-reference 1554930-1 in the TE Connectivity catalog (te.com) to identify compatible contact part numbers. TE Connectivity 140-pin connectors typically use size 20 or size 22 contacts depending on the specific connector series. Verify the contact size before ordering — using incorrect contacts will result in improper seating and potential connector failure.

How do I identify the correct replacement for 1554930-1?

The part number is molded into the connector housing. Cross-reference in the TE Connectivity catalog and verify with the engine manufacturer’s parts catalog. For Cummins engines, the Cummins QuickServe online parts catalog lists the ECM connector part number by engine serial number. Verify pin count (140), gender, locking mechanism, and mounting configuration before ordering.

Typical Applications

• Heavy-duty diesel ECM: Main ECM connector replacement on Class 8 truck engines
• Central gateway modules: CGM connector replacement on modern trucks
• Bus & coach: Integrated body control unit connector replacement
• Agricultural equipment: High pin count ECM connector replacement on large agricultural machinery

Package Contents

1 piece — 140-pin automotive waterproof connector 1554930-1 (housing as specified). Contacts and wire seals ordered separately if not included.