Electronic Ignition System (EIS)
The EIS Control Module has the ability to detect problems with the ignition system. When the control module detects a problem, the module generates a code. There are two types of codes:
- Warning
- Shutdown
Warning - The control module has detected a problem with the ignition system. The problem does not require the engine to be shut down. The control module illuminates the warning lamp. The control module also generates a diagnostic code. The code is stored in the memory of the control module. The code can be viewed via an electronic service tool.
Shutdown - The control module has detected a problem with the ignition system. The problem requires the engine to be shut down. The control module illuminates the shutdown lamp. The control module also generates a diagnostic code. The code is stored in the memory of the control module. The code can be viewed via an electronic service tool. The control module cannot shut down the engine. Instead, the control module activates the shutdown output. The shutdown output can be used by another system to shut down the engine.
Every generated code is stored in the memory of the control module. The codes remain in the memory of the control module even if the power is removed from the module. The codes may be useful to help troubleshoot intermittent problems. The codes can also be used to review the performance of the engine and of the electronic system.
Diagnostic codes may not indicate that a repair is needed. The problem may have been temporary. The problem may have been resolved since the generation of the code. For example, if the system is powered and the warning lamp is disconnected, the control module will detect the problem. The module will generate a diagnostic code for the problem. The module will store the code. When the lamp is connected, the problem will disappear. The code will remain in the memory of the module until the code is cleared.
All of the codes are cleared from memory when the diagnostic reset switch is activated.
Optional Status Control Module (SCM)
The Status Control Module (SCM) has the ability to detect problems with circuits that monitor the engine parameters. Refer to Systems Operation, SENR6883 for information on the status control module.