Group 14 Engine Control System - Hyundai HX140L Manual

GROUP 14 ENGINE CONTROL SYSTEM

(SERIAL NO. : -#0610)
1. MCU and ENGINE ECM
1 MCU
2 Bolt (M8)
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 5-2
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
140L5MS52
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