![]() ![]() The engine will shut down after the 90 second interval. The lamp will start to flash at a rapid rate 90 seconds before the programmed idle time expires. The YELLOW lamp is also used for the Idle Shutdown Timer. If the lamp comes ON and continues to flash every five seconds after initial start-up, the ECM has detected a system problem. The lamp will also illuminate and flash every five seconds whenever the ECM detects an ACTIVE fault or condition. When the ignition key switch is turned ON, the YELLOW lamp will illuminate for five seconds (as a lamp check). The CHECK ENGINE/DIAGNOSTIC (YELLOW) lamp on the vehicle dashboard is used to communicate the status or the operation situations of the electronic engine and the control system. If equipped with an electronic dashboard display, follow the instructions that are provided by the vehicle manufacturer in order to retrieve the engine diagnostic codes. Some vehicles have electronic dashboards that provide a direct readout of engine diagnostic codes. * Caterpillar electronic service tool * CHECK ENGINE/DIAGNOSTIC lamp The diagnostic code can be retrieved by using either of the following methods. In most cases a diagnostic code will be stored in permanent memory within the ECM. When the system detects a problem, the CHECK ENGINE/DIAGNOSTIC (YELLOW) lamp activates. Caterpillar Electronic Engines have self diagnostic capability. ![]()
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