When Starting Switch Is Turned To On Position, Machine Monitor Displays Nothing - Komatsu PC200-8M0 Shop Manual

400 Troubleshooting of electrical system (E-mode)
E-3 When starting switch is turned to ON position, machine monitor displays nothing
E-3 When starting switch is turned to ON position, machine monitor
displays nothing
q
Failure

When starting switch is turned to ON position, machine monitor displays nothing.

q
When starting switch is turned to ON position, machine monitor displays KOMATSU logo screen,
password input screen (if set), breaker mode confirmation screen (if selected), check before start-
Related infor- ing screen, working mode and travel speed confirmation screen, and standard screen in order.
q
mation When engine is started, battery voltage may lower suddenly, depending on ambient temperature
and condition of the battery.
In this case, machine monitor goes off for a moment. This phenomenon is not a failure, however.
Cause
Defective connection of battery
1
ground terminal
2 Insufficient battery capacity
Defective fusible link F05
3
Defective fuse F01-17
Defective wiring harness, starting
4
switch, or machine monitor
Defective starting switch
5
(Internal open circuit)
Open circuit in wiring harness
6 (wire breakage or defective con-
tact of connector)
PC200, 200LC, 220, 220LC-8M0
Procedure, measuring location, criteria and remarks
Check battery ground terminal (60B) connection.
a Be ready with starting switch at OFF position, then perform troubleshooting
without turning starting switch to ON position.
Battery voltage (two pieces)
Electrolyte specific gravity (each)
If fusible link or fuse is blown, circuit probably has ground fault. (See Cause 7.)
1. Turn starting switch to OFF position and disconnect ground cable.
2. Insert T-adapter into connector CM01.
3. Connect battery ground cable, and turn starting switch to ON position (to
connect ACC).
Between CM01 (1) and (3)
Between CM01 (2) and (4)
Between CM01 (10) and (4)
1. Turn starting switch to OFF position.
2. Disconnect connector H15 and connect T-adapters to male side.
3. Turn starting switch to ON position and perform troubleshooting again.
Between H15 (male) (1)
and (5)
If check result on cause 4 is normal, this check is not required.
1. Turn starting switch to OFF position and disconnect ground cable.
2. Disconnect fusible link F05, No. 17 of fuse F01, and connectors H15 and
CM01.
3. Connect T-adapters to male side of connector F05 and female side of H15
and CM01.
Between battery (-) and ground
Between battery (+) and F05 (male) (1)
Between F05 (male) (2) and F01-16E
Between F01-17 and each of CM01 (female) (1)
and (2)
Between CM01 (female) (3), (4) and ground (T05)
Between F01-17 and H15 (female) (1)
Between H15 (female) (5) and CM01(female)(10)
Turn starting switch to
OFF position.
Turn starting switch to
ON position.
SEN06138-00
Min. 24 V
Min. 1.26
Voltage 20 to 30 V
Voltage 20 to 30 V
Voltage 20 to 30 V
Resistance Min. 1 Mz
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
Max. 1 z
Resistance
17
40-400