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Diagnostic Code 52 ECM or Personality Module Fault
Conditions Which Generate This Code:
The Electronic Control Module (ECM) has detected a fault in the Personality Module (PM), the ECM itself or the connector between them.System Response:
Diagnostic Code 52 is current (Diagnostic Lamp, ECAP or DDT) and is LOGGED in memory.Troubleshooting:
Refer to P-220: ECM And Personality Module Test.Diagnostic Code 53 ECM Fault
Conditions Which Generate This Code:
The ECM has detected an internal fault.System Response:
Diagnostic Code 53 is current (Diagnostic Lamp, ECAP, or DDT), and is LOGGED in memory.Troubleshooting:
The ECM must be replaced.Diagnostic Code 55 No Detected Faults
Conditions Which Generate This Code:
There are no ACTIVE Diagnostic Codes in the 3176 System.System Response:
Normal engine operation.Troubleshooting:
Diagnostic Code 55 does NOT indicate a 3176 System fault. It only shows that the system is operating correctly. The ECAP will display a Code 55 if no faults are currently ACTIVE. The Diagnostic Lamp will also flash Code 55 (on demand) if no faults have occurred since power-up.Diagnostic Code 56 Check Customer Or System Parameters
Conditions Which Generate This Code:
One or more of the Customer Specified Parameters and/or System Configuration Parameters are not correctly programmed for the system. Diagnostic Code 56 will be generated if the Electronic Control Module (ECM) has been replaced and any of the parameters have not been programmed.System Response:
1. Diagnostic Code 56 is current (Diagnostic Lamp, ECAP, or DDT), but is NOT LOGGED in memory.2. Engine power may be limited and/or the ECM may limit engine speed to low idle, depending on the parameter causing the Code 56.Troubleshooting:
1. Using an ECAP, read the parameters that triggered the code, shown along with the Diagnostic Code 56 on the " Current Diagnostic Messages" screen.2. Reprogram the displayed parameter(s). Refer to "Programming 3176 Parameters" in Section 2 of this manual.Diagnostic Code 57 Parking Brake Switch Fault
Conditions Which Generate This Code:
1. The Parking Brake Switch indicates the parking brake is ON.-AND-2. Diagnostic Code 36 (Vehicle Speed Signal Out Of Range) is NOT ACTIVE.-AND-3. The ECM reads a vehicle speed greater than 10 mph for at least five seconds.System Response:
1. Diagnostic Code 57 is current (Diagnostic Lamp, ECAP, or DDT), and IS LOGGED in memory.-AND-2. The Idle Shutdown Timer is disabled.Troubleshooting:
Follow P-216: Parking Brake Switch Test, in this manual.Diagnostic Code 63 Low Fuel Pressure Warning
Conditions Which Generate This Code:
1. The engine has been running at least 20 seconds.-AND-2. Diagnostic Code 37 (Fuel Pressure Sensor Fault) is not ACTIVE.-AND-3. Fuel pressure falls below the minimum specified for a given rpm for at least two minutes. Refer to the Chart below for minimum fuel pressure vs. rpm.System Response:
1. Diagnostic Code 63 is current (Diagnostic Lamp, ECAP, or DDT) and is LOGGED in memory.Troubleshooting:
1. Diagnostic Code 63 does NOT indicate a 3176 System fault. It only gives warning that a low fuel pressure condition exists.2. Use the procedures in the "Fuel System Inspection" and "Fuel Transfer Pump" sections of the 3176 Systems Operation Testing And Adjusting Manual, Form SENR3909, to determine the cause of the low fuel pressure condition. Diagnostic Code 72 Cylinder 1