Test Step 2. Determine The Type Of Problem With The Data Link

163

TM 9-2320-312-24-2

Troubleshooting Section

A. Thoroughly inspect the following electrical

Expected Result:

connectors:

Result 1 The engine starts. ET powers up and ET

ECM vehicle harness connector J1/P1

communicates without error.

cab data link connector

Result 2 The engine starts. ET powers up but an

error is displayed.

firewall bulkhead connector

Result 3 The engine cranks but the engine will not

Electronic service tool connectors

start regardless of the condition of ET.

ATA data link (terminal 8 and terminal 9) in the

Result 4 The engine will not crank regardless of

the condition of ET.

connectors

Result 5 The engine starts but ET does not power

Refer to Troubleshooting, "Electrical Connectors

up.

-Inspect" for details.

Note: Check the display screen or check the

B. Perform a 45 N (10 lb) pull test on each of the

communication adapter display in order to

wires in the ECM connector that are associated

determine if ET has powered up. ET will display

with the ATA data link.

information that shows if the tool is receiving power.

If ET or the communication adapter powers up, the

C. Check the ECM connector (allen head screw) for

cab data link connector is receiving power.

the proper torque of 6.0 Nm (55 lb in).

D. Check the harness and wiring for abrasion and

Results:

pinch points from the connector to the ECM.

Result 1 There is not a problem with the

Refer to Illustration 37.

ATA data link at this time. If an intermittent

condition exists, thoroughly inspect all wiring and

connectors.

Expected Result:

All connectors, pins and sockets should be

Repair: Perform the following diagnostic

completely coupled and/or inserted and the harness

procedure:

and wiring should be free of corrosion, abrasion

or pinch points.

Troubleshooting, "Electrical Connectors - Inspect"

Results:

STOP.

OK Proceed to Test Step 2.

Result 2 ET displays an error message. The

ECM is receiving battery power. Proceed to Test

Not OK

Step 5.

Result 3

Repair: Perform the following repair:

Repair the connectors or wiring and/or replace

Repair: Perform the following diagnostic

the connectors or wiring. Ensure that all of the

procedure:

seals are properly in place and ensure that the

connectors are completely coupled.

Troubleshooting, "Engine Cranks But Will Not

Start"

Verify that the repair eliminates the problem.

STOP.

Result 4

Test Step 2. Determine The Type Of

Problem With The Data Link.

Repair: Perform the following diagnostic

procedure:

A. Connect ET to the cab data link connector.

Troubleshooting, "Engine Will Not Crank"

B. Start the engine.

STOP.