Group 14 Engine Control System - Hyundai HX145LCR Manual

GROUP 14 ENGINE CONTROL SYSTEM

GROUP 14 ENGINE CONTROL SYSTEM

1. MCU and Engine ECM (Electronic Control Module) 1. MCU and Engine ECM
1 MCU
2 Bolt (M8)
2. MCU ASSEMBLY 2. MCU ASSEMBLY
1) To match the pump absorption torque with the engine torque, MCU varies EPPR valve output
pressure, which control pump discharge amount whenever feedbacked engine speed drops under
the reference rpm of each mode set.
2) Three LED lamps on the MCU display as below.
LED lamp
G is turned ON
G and R are turned ON
G and Y are turned ON
Three LED are turned OFF Trouble on MCU power ·
G : green, R : red,
LED
2
Trouble
Normal
Trouble on MCU
Trouble on serial
communication line
Y : yellow
5-53
ECM(Engine control module)
1
Service
· Change the MCU
· Check if serial communication
lines between MCU and cluster are disconnected
Check if the input power wire (24 V, GND) of MCU
is disconnected
·
Check the fuse
145LCR5MS01
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