Throttle Potentiometer Test; Learning Throttle; Steer Encoder Test - Toyota 7BPUE15 Service Manual

Toyota Orderpicker Model 7BPUE 1 5 Service Manual
Lower limit (S60); see Note on previous
Auto manual (S61)
Lift limit (S24)
180" Height (S25); see Note on previous

Throttle Potentiometer Test

2. Rotate the throttle (via the control handle)
from neutral to maximum speed in each
direction.
The horn should click and the 2nd BDI
LED should blink 3-4 times for each
direction.
If the horn does not click and the LED
does not blink, the analog voltage is
outside the acceptable range. Test the
resistance of the throttle potentiometer.

Learning Throttle

There are two methods for learning the neutral
position of the throttle potentiometer. You can
use the procedure in the following table or use
the MashWare program. See "Flashware
Program" on page 10-2.
Step Technician Action
1 Key ON, EPO in, Deadman pedal down
2
3 Key ON, wait for 3 horn chirps
4 EPO out, EPO in
5
EPO out, EPO in
EPO out, horn chirps 10 times when
6
truck h a s learned neutral position of
throttle potentiometer
7
8 Key OFF, Key ON

Steer Encoder Test

1. Enter maintenance mode and step OFF
the deadman pedal. See "Enter" on
page 6-4.
00700-CL222-05, 1 5 March 2005
Key OFF
Section 6. Codes and Tests
N : This test will not work if you step on the
O TE
2. Rotate the steering wheel.
3. See Table 6-4 below for test results. This
velocity-sensitive feedback tells you if the
system is receiving steering requests from
the steer encoder.
Horn clicks Steer encoder
and LEDs is good.
blink a t the
same rate you
rotate the
steering wheel.
Horn clicks
Steer encoder
and LEDs is missing one
blink a t a channel.
different rate
than you
rotate the
steering wheel.
Horn and Steer encoder
do not
LEDs or cable is bad.
respond when
you rotate the
steering wheel.
Table Steer Encoder Test Results
4. Measure the voltage a t PC 2- 1 (Channel A)
and PC 2-4 (Channel B) with respect to
PC 2-2 (DGND) a s you rotate the steering
wheel.
5. The voltage should vary a s the steering
wheel is rotated.
Rate of Rotation
Slow
Fast
6. If the voltages do not match the table
above, replace the steer encoder.
Maintenance Mode
None required.
Do not
continue
through the
steer encoder
test.
Test the
individual
channels. Go
to step 4.
Replace the
steer encoder.
Voltage
Toggle 0-5V
Approximately 2.5V