Engine Fault Codes - MULTIQUIP MAYCO Series Operation Manual

MALFUNCTION INDICATOR DIAGNOSTIC SYSTEM
The C30HDGA concrete pump features an engine
malfunction indicator lamp found on the control box
(Figure 34). When a malfunction in the operation of the
engine is detected, the orange check engine light will
illuminate.
There are 2 methods of determining an engine malfunction.
The first method is to connect a computer to the test port
connector. The second method is to connect the blue/
yellow wire from the control box to ground. Use the check
engine indicator lamp on the control box to determine the
error code. The indicator lamp will flash in sequence to
indicate an error code. Use the Diagnostic Error Code Table
(Table 7) to troubleshoot the malfunction.
The second method is explained below. The following steps
use the MAP sensor as an EXAMPLE so that the user may
become familiar with the troubleshooting process.
Example:
1. Open hood and disconnect MAP sensor connector.
See Figure 33.
Figure 33. MAP Sensor Connector
2. Close hood and start engine. Let engine run for 3 to
5 minutes.
3. Verify that check engine warning lamp on the control
box is on (lit). See Figure 34.
CHECK
ENGINE
WARNING
LAMP
Figure 34. Engine Warning Lamp
PAGE 58 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
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ENGINE FAULT CODES

4. If the check engine warning lamp is on, stop engine.
Place ignition key in the OFF position. See Figure 35.
P U M
P I N G
C O N
T R O
Figure 35. Ignition Key (Off
5. Locate the brown and blue/yellow wires joined together
at the back of the control box, tucked inside the split
loom. Remove heat shrink covering the brown and blue/
yellow wires (Figure 36).
E M E
R G E
CHECK N C Y
S T O P
ENGI N E
HOOD
OPEN
BLUE/YELLOW
ENGI N E HOURS
PUMPI N G CONT R OL
REMOT E
ON
OF F
PUMP REMOT E
ON OUT L E T
Figure 36. Ground Connection
6. Connect the brown and blue/yellow wires to chassis
ground. See Figure 36.
L
BROWN JUMPER
RMOVE
HEAT
SHRINK
CONNECT TO
CHASSIS GROUND
WIRE