OM3012.3 Operation - Section 3 Instrument Panel and Controls Page 3-21 (25) CHECK ENGINE Light 3. If there is an active fault: a. The amber/yellow Check Engine light (25) will flash once. b. There will be a 1 -- 2 second pause, and then the red STOP ENGINE light (22) will flash out the three digit diagnostic code. Each digit is indicated with up to five light flashes for each digit. There is a short pause between each digit of the fault code. c. After all three digits are flashed, the yellow lamp will flash once, and then the red lamp will repeat the same fault code sequence as before. This amber/yellow light, when illuminated, indicates an engine "fault" exists.
Current engine operation may proceed, but the machine should be scheduled for checkout/repair as soon as practical. (26) FAULT CHECK Switch This Fault Check switch, when moved to the "ON" (up) position, may be used to activate the "Quantum" Sys- tem diagnostic codes. When the system detects a "fault" and one of the indicator lamps (22, 24, 25) illuminates as previously described, this switch will permit determination of the kind of "fault(s)" detected. DETERMINING "FAULT" CODES 1. To determine an active "Quantum fault", turn the keyswitch to the "OFF" position and wait until the engine completely stops. 2.
Turn keyswitch to "ON" position (engine NOT running) and hold the Fault Check switch (26) in the "ON" position. 4. The system will continue to flash the same fault code until the FAULT SCROLL Switch (23) is activated again. EXITING THE DIAGNOSTICS MODE Starting the engine, or turning the keyswitch to the OFF position, will EXIT the diagnostics fault flash mode. If active fault codes have been determined as de- scribed previously, refer to the Cummins Engine Quan- tum System "Troubleshooting and Repair Manual", Bulletin No. 3666113, Cummins’ "INSITE" service tool for Quantum, or contact an Authorized Repair Loca- tion.