MULTIQUIP MAYCO Series Operation Manual page 59

7. Close hood and place ignition key in the ON position.
See Figure 37.
Figure 37. Ignition Key (On)
8. Observe check engine warning lamp flashing 3
consecutive times and repeating 3 times. This 1-1-1
sequence is defined as the leader code (Figure 38).
Figure 38. Leader Code
MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19) — PAGE 59
ENGINE FAULT CODES
9. The check engine warning lamp will flash in 3 separate
bursts as shown below. This sequence of lamp flashing
represents the MIL flash error code (Figure 39). See
Table 7 for a complete listing of error codes. In the MAP
sensor example, the error code is 127.
Figure 39. MIL Flash Error Code
10. To correct MAP sensor error, remove jumper wire,
reconnect MAP sensor connector (See Figure 33)and
restart engine. It may be necessary to restart and stop
the engine five times in order to clear the error from
the check engine warning lamp. Allow engine to run
3 to 5 minutes.
11. After error code has been corrected, insulate the end
of the brown and blue/yellow wires with electrical tape.