Group 4 Mechatronics System - Hyundai HX140L Manual

GROUP 4 MECHATRONICS SYSTEM

1. ALL ACTUATORS SPEED ARE SLOW (SERIAL NO. : -#0610)
Boom, Arm, Bucket, Swing and travel speed are slow, but engine speed is good.
Spec : P-mode 1850
Before carrying out below procedure, check all the related connectors are properly inserted and
fault code on the cluster.
1) INSPECTION PROCEDURE
NO
Check if HCESPN
140 active fault
display on the LCD
YES
Wiring diagram
MCU
CN-52
50 rpm S -mode
YES
Check electric
current at EPPR
valve
SPEC : 100~700 mA
See TEST 2
NO
YES
Check resistance
at EPPR valve
SPEC : 15~25 (20˚C)
See TEST 1
NO
8
9
10
18
1750 50 rpm
YES
Check pressure
at EPPR valve
NO
2
SPEC : 2~25 kgf/cm
See TEST 3
PUMP EPPR VALVE
9
10
CN-75
CN-1
6-40
E-mode 1650 50 rpm
Cause Remedy
Defective
hydraulic system
Defective Replace
EPPR valve
Defective MCU Replace
Short circuit or Check & repair
poor connection wire harness or
between CN-52 between CN-52
-CN-75 -CN-75
Defective EPPR Replace
valve
FUSE
NO.12
1
2
140L6MS01