E-13 Backup Lamp Does Not Light Or It Keeps Lighting Up - Komatsu WA250-6 Shop Manual

SEN03848-00

E-13 Backup lamp does not light or it keeps lighting up

Contents of
Backup lamp does not light or it keeps lighting up.
trouble
• The machine monitor monitors the primary circuit of the backup lamp relay for a trouble.
Related (If hot short occurs in the primary side of the back lamp relay, failure code [D160KY] is indicated.
information Carry out troubleshooting for it first.)
• If another failure code is displayed, carry out troubleshooting for it first.
1 Broken bulb
Defective fuse No.14 of fuse
2
box (FS2)
Defective backup lamp 1 relay
3
(L109) (Internal trouble)
Possible
causes and
standard value
in normal state
Defective backup lamp 2 relay
4 (L126) (Internal disconnection
or short circuit)
Defective FR pressure select
5
relay (L109) (Internal trouble)
60
40-400
Causes
If a specific backup lamp does not light up, its bulb may be broken
or may have a defective contact. Check the bulb directly.
If the fuse is burn, the circuit probably has a grounding fault, etc.
(See cause 7.)
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
When backup lamp 1 relay (L109) is replaced with a relay of the
same type, if the condition becomes normal, the backup lamp 1
relay is defective.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
When backup lamp 2 relay (L126) is replaced with a relay of the
same type, if the condition becomes normal, the backup lamp 2
relay is defective.
a Prepare with starting switch OFF, then carry out troubleshooting
without turning starting switch ON.
a Prepare with starting switch OFF, then turn starting switch ON
and carry out troubleshooting.
When FR pressure select relay (L101) is replaced with a relay of the
same type, if the condition becomes normal, the FR pressure select
relay is defective.
400 Troubleshooting of electrical system (E-mode)
E-13 Backup lamp does not light or it keeps lighting up
Standard value in normal state/Remarks on troubleshooting
L109 (male)
Between (1) and (2)
L126 (male)
Between (1) and (2)
L101 (male)
Between (1) and (2)
1
Resistance
200 – 400 z
Resistance
200 – 400 z
Resistance
200 – 400 z
WA250, 250PZ-6