ECM Will Not Accept Factory Passwords

TM 9-2320-312-24-2

Troubleshooting Section

i01641569

ECM Will Not Accept Factory

Passwords

SMCS Code: 7569

Probable Causes

The probable root causes are listed in order below:

Incorrect password

Incorrect serial number

Reason code

Recommended Actions

Perform the following diagnostic procedures in

g00714012

order:

Illustration 18

3. Verify that the information was obtained from the

Incorrect password

ECM that is being programmed. Do not accept

the information from the old ECM in order to

Verify that the Caterpillar Electronic Technician (ET)

program Factory Passwords on a replacement

is on the factory password screen. Also, verify

ECM. Do not copy the information from the old

that ET expects Factory Passwords rather than

ECM in order to program Factory Passwords on

Customer Passwords.

a replacement ECM.

Incorrect Serial Number

4. Verify that all characters in the ECM and/or the

ET serial number have been supplied.

1. Verify that the engine serial number that is used

to calculate the password is from the ET screen

5. Verify that the correct passwords were entered.

rather than the engine information plate.

The passwords are case sensitive. Ensure that

the passwords are entered in the correct case.

For example, the engine serial number that is

Also check the characters in the password for

programmed in a new ECM is 0XX00000. If

accuracy.

ET indicates that the engine serial number is

0XX00000, this engine serial number must be

6. Turn the ignition key switch to the OFF position

used to obtain Factory Passwords. Do not use

and retry.

the information on the engine information plate.

Note: Refer to Illustration 18. Ensure that the

2. Verify that all of the information on the ET

recorded information that is used to request the

screen is the information that was supplied to

password is an exact match to the information that

Caterpillar in order to obtain the password. Refer

is displayed on the ET screen.

to Illustration 18.

7. If rechecking the passwords does not correct the

problem, change a Customer Parameter from the

current value to another value and then change

the Customer Parameter back to the original

value. Then revert to the screen and proceed to

obtain Factory Passwords again.

Note: The "Total Tattletale" password will need to

be changed.