Swing Brake Does Not Operate While Swing Parking Brake Cancel Switch Is Set To Normal Position - Komatsu PC88MR-10 Shop Manual

E-33 Swing brake does not operate while swing parking brake cancel
switch is set to NORMAL position
Swing brake does not operate while swing parking brake cancel switch is set to NORMAL
Failure
position.
Related
information
No. Cause
Defective swing parking
brake cancel switch
1
(internal short circuit)
Hot short circuit in
wiring harness
2
(Contact with 24 V
circuit)
PC88MR-10
(PC88MR-FGN-400-A-Z0-A)
Procedure, measuring location, criteria, and remarks
1. Turn starting switch to OFF position.
2. Disconnect connector S25 and connect T-adapter to male side.
Between S25 (male) (13)
Resistance
and (14)
1. Turn starting switch to OFF position.
2. Disconnect connector V03 and connect T-adapter to female side.
3. Turn starting switch to ON position.
4. Swing lock switch: ON
a Measure voltage again with swing lock switch in OFF position.
Voltage Between V03 (female) (2) and ground
40 Troubleshooting
Troubleshooting of electrical system (E-mode)
Swing parking brake
cancel switch: Normal
Swing parking brake
cancel switch: FREE
Min. 1 Mz
Max. 1 z
Max. 1 V
40-425