Replacing the ECM without the Use of the ECM Replacement Feature from Caterpillar Electronic Technician (ET)

TM 9-2320-312-24-2

Troubleshooting Section

c. Use the Troubleshooting, "Customer Specified

5. Flash program the Personality Module into the

Parameters Worksheet" to record the customer

new ECM if the personality module is not already

parameters.

installed. The new ECM is shipped with a blank

Personality Module.

4. Record ECM lifetime totals.

6. Use the ECM replacement feature in ET to

a. Use the Troubleshooting, "Customer Specified

program the new ECM.

Parameters Worksheet (Current Totals

Worksheet)" to record the old ECM Current

7. Enter the value for the "Rating Number"

Totals.

parameter into the new ECM.

5. Temporarily connect the new ECM by connecting

8. Check for active codes. Program any required

both ECM connectors. Do not mount the ECM to

parameters that have not been programmed.

the engine until the timing calibration has been

performed.

Note: On initial powerup of a new ECM, the

parameter "Rating Number" must be programmed

6. Flash program the Personality Module into the

to avoid activating a 253-02 Check Customer Or

new ECM if the Personality Module is not already

System Parameters (56).

installed. The new ECM is shipped with a blank

Personality Module.

9. If 22-13 Check Timing Sensor Calibration is

not active, install the new ECM on the engine.

7. Obtain the factory passwords when the

Otherwise, perform a timing calibration first.

passwords are required.

Replacing the ECM without the Use of

Note: The following parameters can be programmed

the ECM Replacement Feature from

on a new ECM without factory passwords: "Full

Caterpillar Electronic Technician (ET)

Load Setting (FLS)", "Full Torque Setting (FTS)",

and "Engine Serial Number". System Configuration

1. Ensure that the ECM is the problem by first

parameters must be entered before the Customer

connecting a test ECM. This is a temporary

Specified Parameters are entered. If Customer

connection. Hang the test ECM on the side of the

Parameters are entered before the System

engine. Flash program the identical Personality

Configuration Parameters, the Total Tattletale will

Module that was used in the suspect ECM into

change. It will then be necessary to obtain another

the test ECM. Program any parameters that

set of factory passwords in order to access System

are necessary to use the ECM for the test. For

Configuration Parameters.

example, Vehicle speed parameters need to be

programmed to check the vehicle speed circuit.

8. Perform the following operations.

Program the parameters in the test ECM to be

equal to the parameters in the suspect ECM.

a. Use the Troubleshooting, "Factory Passwords

Worksheet" to record the following information

2. If the test ECM repairs the problem, reconnect

from the engine information plate: "Full Load

the suspect ECM. Verify that the problem returns

Setting (FLS)", "Full Torque Setting (FTS)",

when the suspect ECM is reconnected.

and "Engine Serial Number".

3. Obtain customer parameters from the failed

b. Record the mileage from the vehicle odometer.

ECM.

Use ET to access System Configuration

Parameters. When the screen for the "Factory

a. Obtain the Customer Passwords and

Specified Passwords" appears, record the

record the Customer Passwords. If the

following information: "ECM Serial Number",

customer (owner) has lost the passwords

"Engine Serial Number", "ET Serial Number",

or if the customer (owner) has forgotten the

"Total Tattletale", and "Reason Code".

passwords, proceed to Troubleshooting,

"Customer Passwords" for more details.

c. Leave ET on the screen for the "Factory

Specified Passwords" and obtain the factory

b. Use ET to access Customer Specified

passwords. Complete the Troubleshooting,

Parameters from the ECM that is being

"Factory Passwords Worksheet".

replaced. If the ECM does not communicate

with ET, obtain the required parameter list

9. Program the new ECM.

from the OEM.