SUPPORT AS-FRAME 5T5737 - Caterpillar

Note: The table above describes the connections of the machine location codes.Motor ECM
The following is a list of Diagnostic Trouble Codes (DTCs) that are associated with the ECM location codes of the machine.
Table 5
Motor ECM
DTC Code Description System Response
1326-2 ECM Location Code: Erratic, Intermittent, or Incorrect If the DTC triggers when the machine is operating, a level 1 fault will be registered. If triggered at key start, the Power Train will be disabled. This diagnostic code is recorded when the software location code for the ECM does not match the hardware location codes.Possible causes for an FMI 2 diagnostic code are:
The wrong software has been flashed into the ECM.
The machine harness has a short or a poor connection.
The machine harness has an open.
The ECM has failed. A failure of the ECM is unlikely.
Illustration 3 g03701330
ECM Location Code connections
Note: The diagram above is a simplified schematic of the Motor ECM connections. The schematic is electrically correct. However, not all the possible harness connectors are shown. Refer to the latest revision of Electrical Schematic, UENR4073 for the complete schematic.
Table 6
Location Code
Motor ECM Location ID = 2
ECM Pin J1-35 J1-40 J1-41 J1-42
Status of Pin Ground Open Ground Open Note: The table above describes the connections of the machine location codes.Diagnostic Trouble Code Procedure
Note: Prior to beginning this procedure, inspect the harness connectors that are involved in this circuit. Poor connections can often be the cause of a problem in an electrical circuit. Verify that all connections in the circuit are clean, secure, and in good condition. If a problem with a connection is found, correct the problem and verify that the diagnostic code is active before performing a troubleshooting procedure.
Identify the active FMI code associated with the components.
Determine which code is present and use the list below to determine which procedure to follow.
FMI 2 diagnostic code, proceed to Table 7.
Table 7
FMI 2 Troubleshooting
Troubleshooting Test Steps Values Results
1. Verify Hardware And Software Part Numbers
A. Verify that the part numbers for the ECM are correct.
Note:Consult the Technical Communicator at your dealer for the correct part numbers.
All part numbers are correct. OK - All part numbers are correct.
Proceed to Test Step 2.
NOT OK - All part numbers are NOT correct. The installed ECM has the wrong part number or incorrect configuration software.
Repair: Reinstall correct software in the ECM or replace the ECM with the correct part number.
Prior to replacing the ECM, always contact the Technical Communicator at your dealership for possible consultation with Caterpillar. This consultation may effect repair time.
Proceed to Test Step 6.
2. The Location Code Should Match The Summary Screen
A. Check the Cat® Electronic Technician (Cat ET) Service Tool summary screen for the location code.
The location codes in Cat ET are correct. OK - The location codes in Cat ET are correct.
Proceed to Test Step 3.
NOT OK - The location codes are NOT correct.
Repair: Rewire wiring harness to reflect the correct ECM harness location code.
Proceed to Test Step 6.
3. Inspect The Harness Connections
A. Turn the key start switch and the disconnect switch to