Failure Code [Dr21Kx] Camera 2 Picture Rev. Drive Abnormality - Komatsu PC200-8M0 Shop Manual

SEN06136-00

Failure code [DR21KX] Camera 2 Picture Rev. Drive Abnormality

Action
Failure code
level
L01 DR21KX
q
Output voltage of camera 2 image reverse drive line (pin 6 of connector CM04) differs from com-
Detail of failure
mand voltage output from machine monitor.
Action of con-
q Does not display image of camera 2.
troller
Problem on
q
Image of camera 2 is not displayed.
machine
q
When output voltage of camera 2 image reverse drive line (pin 6 of connect CM04) is 0 V, original
image is sent. When it is 8 V, mirror image is sent (since power supply voltage of camera is 8 V, 8
Related infor-
V is used as command voltage to sent mirror image).
mation
q
You must check connector A41 to identify which camera is assigned to camera 2.
q
Method of reproducing failure code: Turn starting switch to ON position.
Cause
Open circuit in wiring harness
1 (wire breakage or defective con-
tact of connector)
Ground fault in wiring harness
2
(contact with ground circuit)
Hot short circuit in wiring harness
3
(contact with 24 V circuit)
4 Short circuit in wiring harness
5 Defective camera 2
6 Defective machine monitor
30
40-304
Failure code [DR21KX] Camera 2 Picture Rev. Drive Abnormality
Camera 2 Picture Reverse Drive Abnormality
Failure
(Machine monitor system)
Procedure, measuring location, criteria and remarks
1. Turn starting switch to OFF position.
2. Disconnect connectors CM04 and A46, and connect T-adapters to each
female side.
Between CM04 (female) (6) and A46 (female) (3)
Between CM04 (female) (5) and A46 (female) (4)
1. Turn starting switch to OFF position.
2. Disconnect connectors CM04 and A46, and connect T-adapters to either
female side.
Between ground and CM04 (female) (6) or A46
(female) (3)
1. Turn starting switch to OFF position.
2. Disconnect connector A46 and connect T-adapters to female side.
3. Turn starting switch to ON position.
a Check that camera 2 is set for original images.
Between A46 (female) (3) and (4), or between A46
(female) (3) and ground
1. Turn starting switch to OFF position.
2. Disconnect connector CM04, A46 and connect T-adapters to CM04 female
side.
Between CM04 (female) (6) and each pin other
than pin (6)
If no failure is found by above checks, camera 2 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.)
304 Troubleshooting by failure code, Part 4
Resistance
Resistance
Resistance Min. 1 Mz
Voltage
Resistance
PC200, 200LC, 220, 220LC-8M0
Max. 1 z
Max. 1 z
Max. 1 V
Max. 1 z