Komatsu PC200-8M0, Руководство по ремонту

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303 Troubleshooting by failure code, Part 3
Failure code [D19JKZ] Personal Code Relay Abnormality
40-303
6
PC200, 200LC, 220, 220LC-8M0
SEN06135-00
Failure code [D19JKZ] Personal Code Relay Abnormality
Action
level
Failure code
Failure
Personal Code Relay Abnormality
(KOMTRAX system in machine monitor)
L03 D19JKZ
Detail of failure q Open circuit or short circuit is detected in primary (coil) circuit of personal code relay.
Action of
machine moni-
tor
q
None in particular (for open circuit)
q Stops output to personal code relay (for short circuit).
q
If cause of failure disappears, machine becomes normal by itself (for open circuit).
q Even if cause of failure disappears, machine does not become normal until starting switch is turned
to OFF position (when short circuit is detected).
Problem on
machine
q
When circuit is open, you can start the engine if engine start lock is enabled.
q
When circuit has ground fault, you cannot start the engine.
Related infor-
mation
q
This failure code is displayed only when engine lock function is enabled.
q Method of reproducing failure code: Turn starting switch to ON position (open circuit). Failure code
cannot be reproduced (short circuit).
q
Troubleshooting for this failure code covers circuit starting from No. 3 of fuse F01, through primary
(coil) circuit of personal code relay R07, to machine monitor.
Cause Procedure, measuring location, criteria and remarks
1 Blown fuse No. 3 of fuse box F01 When fuse is blown, ground fault may have probably occurred in circuit.
2 Defective personal code relay R07
1. Turn starting switch to OFF position.
2. Disconnect relay R07, and connect T-adapters to male side.
Between R07 (male) (1) and (2) Resistance 100 to 500
z
1. Turn starting switch to OFF position.
2. Replace relay R07 with another one.
3. Turn starting switch to ON position.
If this failure code disappears, original personal code relay R07 is defective.
3
Open circuit or short circuit or
ground fault in wiring harness
1. Turn starting switch to OFF position.
2. Remove fuse No. 3 of fuse box F01.
3. Disconnect connector CM01 and connect T-adapter to female side.
Between F01-3 and CM01 (female) (6)
Resistance 100 to 500
z
Between F01-3 or CM01 (female) (6) and ground Resistance Min. 1 M
z
4 Open circuit in wiring harness
a
If no failure is found by check on cause 3, this check is not required.
1. Turn starting switch to OFF position.
2. Remove fuse No. 3 of fuse box F01.
3. Disconnect connector CM01 and relay R07, and connect T-adapters to
each female side.
Between F01-3 and R07 (female) (1) Resistance Max. 1
z
Between R07 (female) (2) and CM01 (female) (6) Resistance Max. 1
z
5 Ground fault in wiring harness
a
If no failure is found by check on cause 3, this check is not required.
1. Turn starting switch to OFF position.
2. Remove fuse No. 3 of fuse box F01.
3. Disconnect connector CM01 and relay R07, and connect T-adapters to
either female side.
Between F01-3 or R07 (female) (1) and ground Resistance Min. 1 M
z
Between R07 (female) (2) and ground, or between
CM01 (female) (6) and ground
Resistance Min. 1 M
z
6 Short circuit in wiring harness
1. Turn starting switch to OFF position.
2. Remove fuse No. 3 of fuse box F01.
3. Disconnect connectors CM01 and relay R07, and connect T-adapters to
female side of connector CM01.
a
Check with multimeter in continuity mode.
Between CM01 (female) (6) and each pin other
than pin (6) No continuity
(No sound is heard)
7
Defective machine monitor
(KOMTRAX section)
If no failure is found by above checks, machine monitor (KOMTRAX portion) is
defective. (Since this is an internal defect, troubleshooting cannot be per-
formed.)