885575 Mercury OWNERS MANUAL

Active Diagnostic Codes
An Active diagnostic code represents a problem with the electronic control system. This problem should be corrected as soon as possible. When an active diagnostic code is generated, a display module such as the Vital Information Display System (VIDS) may produce a warning.Logged Diagnostic Codes
When the ECM generates a diagnostic code, the ECM logs the code in permanent memory. The ECM has an internal diagnostic clock. The ECM will record the hour of the first occurrence of the diagnostic code. The ECM will record the hour of the last occurrence of the diagnostic code. The ECM will record the number of occurrences of the code. This information is a valuable indicator for troubleshooting intermittent problems. Any Logged diagnostic codes will automatically be deleted if no additional occurrences are recorded in 100 hours. Some diagnostic codes may be easily triggered. Some diagnostic codes may log occurrences that did not result in complaints. The most likely cause of an intermittent problem is a faulty connection or damaged wiring. The next likely cause is a component failure. The least likely cause is the failure of the ECM. Diagnostic codes that are logged repeatedly may indicate a problem that needs special investigation.If the symptoms continue, use the proper procedure for troubleshooting the symptoms that have been experienced by the operator.Note: Always clear logged diagnostic codes after you investigate the problem which generated the code. Always clear logged diagnostic codes after you correct the problem which generated the code.
Illustration 1 g00592364
The diagram indicates output voltage from the coolant temperature sensor. The Cat ET can be used to turn ON the engine monitoring for a specific sensor. When the monitoring is turned ON, the sensor's value and any diagnostic event code will appear on the Cat ET. When the features are turned OFF, the engine monitoring will be disabled, but the event is logged in the ECM.Diagnostic Terminology
Table 1
3500B System Diagnostic Codes    
CID (1)     FMI (2)     Description    
0001     05     Injector Cylinder 1 open circuit    
0001     06     Injector Cylinder 1 short    
0002     05     Injector Cylinder 2 open circuit    
0002     06     Injector Cylinder 2 short    
0003     05     Injector Cylinder 3 open circuit    
0003     06     Injector Cylinder 3 short    
0004     05     Injector Cylinder 4 open circuit    
0004     06     Injector Cylinder 4 short    
0005     05     Injector Cylinder 5 open circuit    
0005     06     Injector Cylinder 5 short    
0006     05     Injector Cylinder 6 open circuit    
0006     06     Injector Cylinder 6 short    
0007     05     Injector Cylinder 7 open circuit    
0007     06     Injector Cylinder 7 short    
0008     05     Injector Cylinder 8 open circuit    
0008     06     Injector Cylinder 8 short    
0091     08     Throttle Position signal abnormal    
0100     03     Engine Oil Pressure open/short to +batt    
0100     04     Engine Oil Pressure short to ground    
0100     13     Engine Oil Pressure calibration required    
0101     03     Crankcase Pressure open/short to +batt    
0101     04     Crankcase Pressure short to ground    
0101     13     Crankcase Pressure calibration required    
0110     03     Engine Coolant Temperature open/short to +batt    
0110     04     Engine Coolant Temperature short to ground    
0168     00     System Voltage High    
0168     01     System Voltage Low    
0168     02     System Voltage intermittent    
0190     02     Loss of Engine Speed signal    
0190     03     Engine Speed open/short to +batt    
0190     08     Engine Speed signal abnormal    
0253     02     Personality Module mismatch    
0254     12 &