Toyota 7BPUE15 Service Manual page 361

Section 9. Theory of Operation
Pinout Matrix
12VP
DGND
TRANSMIT
Toyota Orderpicker Model 7BPUE 15 Service Manual
Supplies B+ Key to the circuitry on the
STM via the over mast cable when the key
switch is closed.
Supplies B+ ESTOP to the K1 relay coil on
the STM via the over mast cable when the
EPO switch (S21) is closed. This closes the
relay and supplies B+ ESTOP Relay to
circuits on the STM.
Supplies B- to the carriage via the over
mast cable when the battery is plugged
Supplies 12V from the STM power supply
to the Carriage Manager via the over
mast cable. The 12V is used to power the
C M power supply and supplies voltage to
all components using the
present, check voltage at STM JPT9-6 and
see if
Output from deadman switch S23 informs
the microprocessor on the STM that the
switch is closed and lights 1 1 2 on the STM.
Supplies B- to the carriage via the over
mast cable when the battery is plugged
The wire that carries the communications
from the STM to the CM. N o usable
information can be gained by measuring
the voltage on this wire.
Carriage
switch closed. Manager
O V with key
switch open.
Carriage
switch closed. Manager
O V with the EPO
Open
STM
(B-)
STM
with key switch
closed
Switch Carriage
Closed: < 1 Vdc Manager
Open: 5Vdc
STM
(B-)
N o useful STM
voltages are
measurable
00700-CL222-05, 1 5 March 2005
STM
Carriage
Manager
Carriage
Manager
STM
Carriage
Manager
Carriage
Manager