Est Tool — Fault Codes
Figure 1. Diagnostic Form
For a reproduction of the applicable portion of the diagnostic form, see Figure
The purpose of the EST — Fault Codes check is to determine if the ECM has detected any fault conditions that would cause a hard or no start condition.
Before starting this procedure, turn all accessories and the ignition off. Then connect the EST tool to the ATA diagnostic connector.
Connect the EST to the American Trucking Association (ATA) diagnostic connector. If the engine is installed in a truck, the connector is located on the lower left kick panel inside the cab. Body builders could locate this connector in other places. The screen of the reader should light up as soon as the tool is plugged in. See Figure
“Electronic Service Tool / ATA Connector Location”
1. ATA Connector
Figure 2. Electronic Service Tool / ATA Connector Location
Note: The ATA connector supplies power to operate the EST. The EST will automatically power up as soon as it is plugged into the ATA connector.
Turn the ignition switch to the ON position, but do not start the engine. See Figure
. This will allow the EST to receive data from the electronic control components. Press enter for NAVPAK menu.
Figure 3. MPSI Pro-Link
To access the fault codes, press the ↓ down arrow key to switch to the Diagnostic Codes menu. See Figure
Figure 4. MPSI Menu
From the main menu press the ↓ arrow down key to select Diagnostic Codes. The selection will have the ↑↓ symbol on the screen, indicating there are other selections available. By pressing the ↓ key, the other selections will display on the screen. Press ↓ key until Diagnostic Codes displays on the screen. See Figure
Figure 5. Main Menu
Next press enter. You are now in the diagnostic codes selection of the tool. From this point, diagnostic codes can be accessed.
The first option that will appear is ACTIVE CODES. By selecting this option, the fault codes that have been detected on the current (ignition) key ON cycle will be displayed. See Figure
“Diagnostic Codes Menu”
Figure 6. Diagnostic Codes Menu
Press enter. If there are any active codes, the first one will appear on the screen along with a description of the code. The number in the upper left hand corner represents the Flash Code number. This flash code number is referenced on the electronic diagnostic form. The numbers at the bottom of the screen represent the SAE codes. Press ↓ key to access the additional codes. If there are not any codes active, EMPTY will display on the screen.
To access Inactive Codes press the FUNC key. This will access the last prior menu selection. Then press the ↓ key to select INACTIVE CODES. Press the enter key. See Figure
“Diagnostic Codes Menu”
Figure 7. Diagnostic Codes Menu
Inactive codes are faults that have occurred in the previous (ignition) key ON cycles and are now stored in memory. An active code will become an inactive code when the ignition (key) is shut off.
Record all fault codes and refer to the Electronic Diagnostic Form. Refer to “10.1 Introduction”
, and fault code diagnostics.
Note: All current fault codes must be repaired and cleared before proceeding with further diagnostic testing.
ECM detectable faults that will cause a no start or hard start condition are:
- Camshaft position (CMP) sensor inactive faults
- Injection pressure regulator (IPR) output circuit check fault
Pro-Link 9000, J 38500–100
|Series 40E Troubleshooting Manual – 6SE241|
|Generated on 10-13-2008|