C4.4 and C6.6 Engines Caterpillar

Connectors for the Electronic Control Module (ECM)

The Electronic Control Module (ECM) uses connectors that have 70 terminals to interface to the wiring harness.

Illustration 1	g01877659
Layout of the Connector Pins (view from the rear)

Terminal Removal

Illustration 2	g01877813
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 3	g06099709

Sensor Connectors

Analog Sensor Connector (active)

Illustration 4	g01240891

Analog Sensor Connector (passive)

Illustration 5	g01241538

Connectors for the Termination Resistor

Illustration 6	g01355248

Engine Speed/Timing Connector

Illustration 7	g01155187

Ampseal Connector (typical)

Illustration 8	g02219254

Deutsch Connectors (typical)

Illustration 9	g02220494