Electronic Service Tool Will Not Communicate with ECM

TM 9-2320-312-24-2

Troubleshooting Section

Reason Code

2. Verify that the correct "Communications Interface

Device" is selected.

1. Verify that the correct reason code from the

3. Verify that the correct "Port" is selected for use

Factory Password Screen was entered. Do

by the communication adapter.

not assume the reason code. This must be

obtained from ET. Reason codes are assigned

Note: The most commonly used port is "COM 1".

for specific purposes and reason codes are not

interchangeable.

4. Check for any hardware that is utilizing the same

port as the communications adapter. If any

2. Turn the ignition key switch to the OFF position

devices are configured to use the same port, exit

and retry.

or close the software programs for that device.

Note: Ensure that the information that is entered is

an exact match to the information that is displayed

Electrical Connectors

on the ET screen.

Check for correct installation of the J1/P1 and J2/P2

ECM connectors and the service tool connector.

i01748834

Refer to Troubleshooting, "Electrical Connectors

Electronic Service Tool Will

- Inspect".

Not Communicate with ECM

Communication Adapter and/or Cables

SMCS Code: 7569

1. If you are using a Communication Adapter II,

ensure that the firmware and driver files for the

Probable Causes

communication adapter are the most current files

that are available. If the firmware and driver files

Configuration for the communications adapter

do not match, the communication adapter will

not communicate with Cat ET.

Electrical connectors

2. Disconnect the communication adapter and

Communication adapter and/or cables

the cables from the service tool connector.

Reconnect the communication adapter to the

Electrical power supply to the service tool

service tool connector.

connector

3. Verify that the correct cable is being used

Cat ET and related hardware

between the communication adapter and the

service tool connector. Refer to Troubleshooting,

Electrical power supply to the ECM

"Electronic Service Tools".

Override switches

Electrical Power Supply to the Service

Tool Connector

Personality module (flash file)

Verify that battery voltage is present between

ATA Data Link

terminals A and B of the service tool connector. If

the communication adapter is not receiving power,

Recommended Actions

the display on the communication adapter will be

blank.

Start the engine. If the engine starts, but the ECM

will not communicate with the Caterpillar Electronic

Cat ET and Related Hardware

Technician (Cat ET), continue with this procedure.

If the engine will not start, refer to Troubleshooting,

In order to eliminate Cat ET and the related

"Engine Cranks but Will Not Start". If the engine will

hardware as the problem, connect Cat ET to a

not crank, refer to Troubleshooting, "Engine Will

different engine. If the same problem occurs on

Not Crank".

a different engine, check Cat ET and the related

hardware in order to determine the cause of the

Configuration for the Communications

problem.

Adapter

1. Access "Preferences" under the "Utilities" menu

on Cat ET.