5. FUEL INJECTION SYSTEM MXU 500EXi/MXU500i CHECK ENGINE LAMP (CELP) Turn the ignition switch to "ON" position The CELP indicator will be lighting until the engine starting If no failure code, the CELP indicator would be turned off. If the failure code happens, the CELP indicator would be turned on CELP (Check Engine Lamp) Turn the ignition switch to "ON" position The indicator will be lighting until the engine starting If no failure code, the indicator would be turned off. If the failure code happens, the indicator would be turned on EFI system electric parts fault indicator 5-9