Section 9. Theory of Operation Toyota Orderpicker Model 7BPUE 15 Service Manual

from Toyota Forklift 7BPUE15 Service Manual SN 80001 and up - PDF DOWNLOAD

Section 10. Firmware Configuration

Key Switch (S1 ) On Key Switch (Sl) On

When the key switch is first turned on, the microprocessor control system performs a self-diagnostics of certain inputs and outputs. The self-diagnostics lasts approximately 1 second. Sensor leads are checked for the correct voltages during the self-diagnostics. If a problem is detected, the steer/tractor manager prevents truck operation and displays a fault code on the operator display.

With the wire guidance option, the guidance manager receives battery voltage at JP2 - 1 1 as B+ESTOP.

Refer to the schematic in Figure 9 - 3 on page 9 - 12. (The electrical schematic legend is on page 9-2.)

The following voltage points are measured with respect to TP4 (B-):

1. Turning the key switch (S1) on supplies battery voltage from S1 - 2 to JPC 1 1 - 1 (B+ KEY).

2. Battery voltage is at the following points on the carriage manager:

JPC 1 1 - 2 through S2 1 to JPC 1 1 - 3 (B+ ESTOP)

JPC9-4 (B+KEY)to JFT10-4 on the steer/tractor manager

JPC9-3 (B+ ESTOP) to JPT10-3 on the steer/tractor manager (closing relay K1)

3. Battery voltage is at the following points on the steer/tractor manager:

JPT11-10 (B+ KEY) to the traction power amplifier J 1 -16

4. Battery voltage is at the following points on the steer/tractor manager as B+ ESTOP:

JPT12-2 1 through the load-holding solenoid coil to JPT12-9

JPT12-21 through the lift/lower solenoid coil to JPT12-8

JPT12-2 1 through the PC contactor coil to JPT12-20

JPT12-21 through the brake coil to JPT12-17

5. The steer/tractor manager receives battery voltage and produces the following voltages:

+12volts (12VP)

+5 volts

Boost for steer power head

6. + 12 volts (12VP) is present at the following points on the steer/tractor manager:

JPT5-2 (height 120"/150 " switch S29)

JPT5-5 (height 180 " switch S25)

JFT5-8 (optional lift limit switch S24)

JPT7-2 (spare switch input)

JPT3-2 (steer home sensor S8)

JFT12-6 (optional hour meter)

JPT9-6 (to carriage manager)

JPT1-9 (MULTI connector)

JFT8-8 (steer power head)

7. + 1 1.3 volts is supplied by the carriage manager to the following points on the carriage manager (this is generated from + 12VP from the steer/tractor manager):

JPC3 - 6 (optional lower limit S60)

JPC 12 - 6 (optional sidegate switch 1, S19)

JPC7 - 2 (Deadman 1 S2)

JPC7 - 5 (Deadman 2 S23)

JPC7-8 (24 " limit switch S6)

JPC7-1 1 (60 " height switch S7)

JPC 12 - 15 (optional sidegate switch 2, S20)

JPC 1 -1 (operator display)

8. +5 volts is present at JPC2 - 3 (steer encoder) on the carriage manager.

9. +5 volts is present at PT6-3 steer feedback encoder) on the steer/tractor manager.

With the wire guidance option, the guidance manager receives:

1. Battery positive at JPS2-1 1 as B+ESTOP. This is also used by the power supply on the guidance manager (GM) to generate +12 volts which is used by the steer

Key Switch (S1) On

controller micro processor, internal If a problem is detected, the steer/tractor circuitry, and the filter card. The + 12 volts manager prevents truck operation and tells the is also supplied to: CM to display a corresponding fault code on the Tractor sensor at JPW2- 15 operator display.

Load sensor at JPW1 -1 5

Speed encoder at JPS1-19

2. Battery negative at JPS2 - 24.

3. Battery negative at JPS4-3 as DGND.

When the key switch is first turned on, the Microprocessor's perform a self-diagnostics of certain inputs and outputs.

The carriage manager checks:

1. The + 12 volt supply from the steer/tractor manager.

2. Checks to make sure the steer tiller encoder is plugged in.

3. Checks the state of Deadman 1 and informs the STM.

4. Checks the voltage from the travel and lift pot and sends the voltages to the STM.

The steer tractor manager checks:

1. The + 12 volt supply.