Toyota 7BPUE15 Service Manual page 314

Toyota Orderpicker Model
controller micro processor, internal
circuitry, and the filter card. The
is also supplied to:
Tractor sensor a t JPW2- 15
Load sensor a t JPW 1
Speed encoder a t J P S 1- 19
2. Battery negative a t JPS2-24.
3. Battery negative a t JPS4-3 a s 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
pot and sends the voltages to the STM.
The steer tractor manager checks:
+
1. The 12 volt supply.
2. The voltages from the travel
and compares them to the learned neutral
and out of range values.
3. The state of the P contactor a t JPT12-3.
4. The state of the mast switches.
5. The state of the EPO switch a t JPT10-3.
6. The state of the Deadman switches.
7. The state of the PC contactor a t JPT12-3.
8. Battery Voltage for proper range a t B+ key.
9. Calculates BDI using B+PC.
10. Requests feedback from the Guidance
Manager on the results of it's
self-diagnostics.
1 1. Inputs from the TPA to verify its operation.
The Guidance Manager checks:
1. To make sure the filter card is plugged in
based on a jumper on the filter card
between JS 1-A10 and A1 1.
00700-CL222-05, 1 5
Service Manual
+
12 volts
1 5
and lift
and lift pot
2005
March
Section
If a problem is detected, the steer/tractor
manager prevents truck operation and tells the
CM to display a corresponding fault code on the
operator display.
9.
Theory of Operation
Key Switch O n