MULTIQUIP MAYCO C30HDGA, Operation Manual

Page: 58 / 70

PAGE 58 — MAYCO C30HDGA CONCRETE PUMP • OPERATION MANUAL — REV. #1 (09/09/19)
ENGINE FAULT CODES
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.
Figure 34. Engine Warning Lamp
ENGINE
HO
URS
REM
OTE
ON
PU
MP
ON
OFF
IGNITION
SWITCH
OFF
ON
STAR
T
REMOTE
OUTLET
HIGH
LOW
PUMPING
CONT
ROL
HOO
D
OPEN
CHECK
ENGIN
E
T
H
R
O
T
T
L
E EME
RGE
NCY
STOP
CHECK
ENGINE
WARNING
LAMP
4. If the check engine warning lamp is on, stop engine.
Place ignition key in the OFF position. See Figure 35.
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).
Figure 36. Ground Connection
6. Connect the brown and blue/yellow wires to chassis
ground. See Figure 36.
PUM
PIN
G CO
NTR
OL
IGNITION
SWITCH
OFF
ON
STAR
T
ENGINE HOURS
REMOTE
ON
PUMP
ON
OFF
IGNITION SWITCH
OFF
ON
START
REMOTE
OUTLET
HIGH LOW
PUMPING CONTROL
HOOD
OPEN
CHECK
ENGINE
T
H
R
O
T
T
L
E
EMERGENCY
STOP
BROWN
BLUE/YELLOW
JUMPER
WIRE
CONNECT TO
CHASSIS GROUND
RMOVE
HEAT
SHRINK