Group 4 Mechatronics System - Hyundai R480LC-9S Service Manual

GROUP 4 MECHATRONICS SYSTEM

GROUP 4 MECHATRONICS SYSTEM (CLUSTER TYPE 1)
1. ALL ACTUATORS SPEED ARE SLOW 1. ALL ACTUATORS SPEED ARE SLOW
※
Boom, Arm, Bucket, Swing and travel speed are slow, but engine speed is good.
※ Spec : P-mode 1850 ± 50 rpm
※
Before carrying out below procedure, check all the related connectors are properly inserted and
fault code on the cluster.
1) 1) INSPECTION PROCEDURE INSPECTION PROCEDURE
NO
Check if HCESPN
140 active fault
display on the LCD
YES
Wiring diagram Wiring diagram
MCU
CN-53
S -mode
YES
Check electric
current at EPPR
SPEC : 5~20 kgf/cm
valve
See TEST 3
SPEC : 100~700 mA
See TEST 2
NO
YES
Check resistance
at EPPR valve
SPEC : 15~25Ω(20。C)
See TEST 1
NO
4
8
8
18 7
CN-1
1750 ± 50 rpm
YES
Check pressure
at EPPR valve
NO
2
FUSE
NO.10
PUMP EPPR VALVE
CN-75
6-56
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-53 between CN-53
-CN-75 -CN-75
Defective EPPR Replace
valve
2
1
4809S6MS01