Troubleshooting by failure code
Failure code [DBL2KK] (Solenoid Power Low Error)
WA900-3E0
Failure code [DBL2KK] (Solenoid Power Low Error)
40-29
Action level Failure code
Failure
Drop in solenoid power supply voltage
(Power ladder controller system)
E03 DBL2KK
Detail of failure
q Solenoid supply voltage drops below 18 V while starting switch is at ON position or ladder is oper-
ated.
Action of con-
troller
q Stops driving solenoid and buzzer.
Problem on
machine
q Ladder does not move when switch is operated.
q Parking brake can be released (parking brake interlock does not function) even if ladder is not
stored in position.
Related infor-
mation
q Ladder can be moved to storage and boarding positions by using emergency release valve.
No. Cause Procedure, measuring location, criteria and remarks
1
Defective power ladder controller
(when power supply voltage mea-
sured at pin is normal)
1. Turn starting switch to OFF position.
2. Disconnect PC0 and connect T-adapter.
3. Start engine and perform troubleshooting.
Voltage Between PC0 (30) and (31) 20 to 30 V
2 Check of fuse for breakage Continuity PFSE in fuse box Continuity
3 Defective circuit breaker
Directly check circuit breaker CB2 of controller power supply. (If circuit breaker
is tripped, circuit probably has ground fault.)
4
Open circuit in wiring harness
(wire breakage or defective con-
tact of connector)
1. Turn starting switch to OFF position.
2. Disconnect PC0.
3. Turn starting switch to ON position and perform troubleshooting.
Voltage Between PC0 (female) (30) and ground 20 to 30 V
1. Turn starting switch to OFF position.
2. Disconnect PC0.
Resistance
Between ground and each of PC0 (female) (21) and
(31)
Max. 1 z
Between PC0 (female) (30) and each of (2) and (12) Max. 1 z
5
Open circuit in wiring harness
(short to ground circuit)
1. Turn starting switch to OFF position.
2. Disconnect PC0.
Resistance
Between PC0 (female) (30) and
ground
Min. 1 Mz
40-29
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