Failure Code [D8Aqkr] Can2 Discon (Komtrax) - Komatsu PC200-8M0 Shop Manual

SEN06135-00

Failure code [D8AQKR] CAN2 Discon (KOMTRAX)

Action
Failure code
level
– D8AQKR
q
Machine monitor cannot recognize pump controller through CAN communication 2 line (KOM-
Detail of failure
NET/c).
Action of
q
machine moni- None
tor
Problem on
q
None
machine
q
Method of reproducing failure code: Turn starting switch to ON position.
q
Start of CAN communication is recognized by each controller when ACC signal of starting switch
is received.
q
Machine monitor indicates a CAN communication error in CAN2 with failure code [DA2QKR],
[DB2QKR], [D8AQKR], or [DAZQKR]. If all four of these failure code are displayed, harness (CAN
communication line) may have ground fault, short circuit, or hot short circuit. Since air conditioner
is also controlled via CAN communication, check whether air conditioner is operated (ON/OFF and
Related infor-
air flow adjustment) on air conditioner screen.
mation
a Air conditioner can be operated even when failure code is displayed on machine monitor screen. If
air conditioner is operated, there is no possibility of ground fault, short circuit, or hot short circuit in
wiring harness (CAN communication line).
q
Since each controller and machine monitor are connected to continuous power supply, they receive
continuous power even while starting switch is at OFF position.
q
Since active CAN communication line signal is pulse voltage, it cannot be measured by using mul-
timeter.
No. Cause
1 Defective fusible link F05
Defective fuse No. 17 in fuse box
2
F01
Power supply to KOMTRAX termi-
3
nal defective
Defective CAN communication 2
4
line
5 Defective KOMTRAX terminal
6 Defective machine monitor
10
40-303
CAN 2 Disconnection (KOMTRAX)
Failure
(Detected by machine monitor) (Machine monitor system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect fusible link F05 and connect T-adapters to female side.
Between F05 (female) (1) and (2)
a If fusible link is blown, circuit may have ground fault.
1. Turn starting switch to OFF position.
2. Remove fuse No. 17 in fuse box F01.
If fuse is blown, circuit probably has ground fault.
Perform troubleshooting for E mode, "E-36"
Perform checks on cause 4 to 9 in troubleshooting for failure code [DB2QKR].
If no failure is found by above checks, KOMTRAX terminal is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
If no failure is found by above checks, machine monitor is defective.
(Since this is an internal defect, troubleshooting cannot be performed.)
303 Troubleshooting by failure code, Part 3
Failure code [D8AQKR] CAN2 Discon (KOMTRAX)
Resistance
PC200, 200LC, 220, 220LC-8M0
Max. 1 z