TH31-C9I, TH31-C9P, TH31-C9T, TH35-C11I, TH35-C13I, TH35-C13T, TH35-C15I and TH35-C15T Petroleum Power Train Packages and TH31-E61 and TH35-E81 Petroleum Transmissions Power Train Electronic Control System Caterpillar


Connector Locations

Usage:

TH31-E61 LAD
The Electrical System Schematic, Parts Manual and Operation and Maintenance Manual for the vehicle that is being serviced should be used to locate electrical components and connectors.

The following information is a guide to reading the tables on the back of the Electrical System Schematic.

  • The "Component Location" table uses white circles to mark the locations in the profile of the vehicle and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the vehicle. Refer to the corresponding footnote at the end of the table for a description of the location.

  • The "Harness Connector Location" table uses white circles to mark the locations in the general view and in the area views. Alphabetical letters in the "Machine Location" column indicate a general area of the vehicle. Refer to the corresponding footnote at the end of the table for a description of the location.

Harness Connectors




Illustration 1g01255959

Electronic Control Unit (ECU)




Illustration 2g01255962

J1 and J2 Harness Connectors that mate to the ECU

OEM Connector

This connector routes power and switch inputs to the ECU. Crimping and wire specifications for this connector are similar to the 70 terminal connector. The figures below show pin, socket locations, and keys for the 40-pin connector.




Illustration 3g00923108

J3 Harness Connector

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