EP Equipment EPT20-15ET, Service Manual

Page: 92 / 128

REV. 09/2016
ELECTRICAL SYSYTEM
8
81
8.7 Interlock Switch
8.7.1 Removal and Installation
-
-
-
Disconnect the connection between interlock
switch and main wiring harness;
Unscrew the two screws (1) with a wrench,
and remove the mounting plate (2) from the
joint holder (3);
Unscrew the two screws (4), and remove the
interlock switch (5) from the mounting plate
(2).
Removal
8.7.2 Faults and Causes
1
Fault
Interlock switch not pressed, the
vehicle can still travel
Cause
a. Interlock switch failure;
b. Interlock switch shorted
(short circuit).
Installation
-
Install according to the reverse order of rem-
oval.
Checking
-
-
Check if the appearance of interlock switch
and its wiring harness are in good condition,
and if the connectors are connected securely;
Repeatedly press the interlock switch to che-
ck if it can reset properly.
8.7.3 Checking and Testing
-
-
-
Enter Monitor Menu to check the status of the
switch: “Inhibit”, press the interlock switch, if
the display does not change, then it indicates
the interlock switch or its circuit failure;
(see Section 8.9)
Check if the interlock switch circuit is condu-
cted;
Carry out ON/OFF test to interlock switch
with a multimeter:
Reset the interlock switch (original position),
the circuit is disconnected;
press the interlock switch, the circuit is con-
ducted.
Testing
8.7.4 Control Circuit Troubleshooting
Interlock Switch Control Circuit
(Figure 30516)
Check if the circuit is broken by using a multi-
meter:
-
-
Set the multimeter to ON-OFF;
Check if #1/#8 circuit (circuit between inter-
lock switch and controller) is conducted.
Key Switch
2
Fault
Interlock switch pressed, the
vehicle cannot travel
Cause
a. Interlock switch failure;
b. Interlock switch with broken
circuit.