C7.1 Engines and Generator Sets Caterpillar


Electrical Connectors

Usage:

C7.1 770

Connectors for the Electronic Control Module (ECM)



Illustration 1g06123997
Locations of the components on the engine ECM
(1) P2 ECM connector (harness side)
(2) P2 ECM connector (ECM side)
(3) Engine ECM
(4) P1 ECM connector (ECM side)
(5) P1 ECM connector (harness side)


Illustration 2g06124000
Numbering arrangement of ECM connector pins

Terminal Removal

Table 1
Required Tools 
Tool  Part Number  Part Description  Qty 
A  151-6320  Removal Tool (Red) 


Illustration 3g01877813
Removal Tool

  1. Remove the connector from the ECM. Refer to Disassembly and Assembly, "Electronic Control Module - Remove and Install".

  2. Position Tooling (A) around wire (2).

    Note: Make sure that the tool stays perpendicular to the face of connector (1).

  3. Push the tool into the hole for the terminal. Gently pull the wire to remove the terminal from the rear of connector (1).

  4. Remove the Tooling (A) from the wire.

    Note: If a terminal must be replaced, part number 9X-3402 must be used for 16 and 18 AWG wire. Part number 126-1768 must be used for 14 AWG wire.

Terminal Insertion

  1. Push the terminal into the rear of connector (1) until the terminal engages with the locking device.

  2. Gently pull on wire (2) to make sure that the terminal is retained by the locking device.

  3. Connect the connector to the ECM and then tighten the retaining screw to a torque of 6 N·m (53 lb in).

Injector Connectors

Connectors at the Valve Cover



Illustration 4g03745086

Sensor Connectors

Analog Sensor Connector (active)



Illustration 5g01240891

Analog Sensor Connector (passive)



Illustration 6g01241538

Connectors for the Termination Resistor



Illustration 7g01355248

Engine Speed/Timing Connector



Illustration 8g01155187

Ampseal Connector (typical)



Illustration 9g02219254

Deutsch Connectors (typical)



Illustration 10g02220494

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