Toyota 7BPUE15 Service Manual page 297

Section 8. Wire Guidance
Tests
1. Park the truck directly over the guide wire.
2. Turn the key switch OFF.
N : To test each sensor, you must enter a
OTE
horn code-one for the load sensor, one
for the tractor sensor. Once you enter
the code, you can test coils individually
in each sensor.
3. Enter the horn code to test the tractor or
load sensors. To switch between tests,
turn the key switch OFF before entering
the other code.
Load Sensor
Tractor Sensor
a. Hold down the horn button and turn the
key switch ON. Do not release the horn
yet.
b. Wait for the steer LEDs to stop flashing,
and release the horn button.
c. Press and release the horn button the
number of times a s the first digit of the
horn code. Each time you press the
button, a n addition BDI LED will light.
d. Wait for the BDI LEDs to turn off.
e. Press and release the horn button the
number of times in the second digit of
the horn code.
f. Wait for the BDI LEDs to turn off.
Near Wire Coil
8- 18.
Figure Operator Display
Toyota Orderpicker Model 7BPUE15 Service Manual
N : The steer LEDs indicate which coil is
OTE
being tested. See Figure 8- 18. To change
the coil being tested, press the horn
button. The battery LEDs indicate the
signal strength of each coil. See
Figure 8- 18.
Check the near wire coil pairs and verify
4.
the signal strengths are approximately the
same.
5. Check the
4
and verify the signal strengths are
approximately the same.
Drive the truck diagonally across the guide
6.
wire to monitor the guidance channels.
The signal strength should increase a s the
coil approaches the wire, and decrease a s
the coil moves farther away from the wire.
a. If one or more channels are low, re-learn
the guidance offsets (page -10) and
repeat the test.
b. If one or more channels are still low,
swap the sensor input connectors on the
filter card a t JPWl and JPW2.
If the low channel stays the same,
replace the filter card and re-learn the
guide wire frequency and offsets.
If the low channel stays the same after
replacing the filter card, replace the
steer controller.
c. If the low channel changes to the other
end of the truck, test the cable for
continuity shorts between wires, and
shorts to frame. Include the shield wire
a t pin 13 in PW1 and PW2. If the cable
tests good, replace the sensor.
Drive away from the wire and operate all
truck functions, including travel, lift,
steering, horn and any optional equipment
while checking the guidance coils. If the
guidance signal increases due to the
operation of any of these functions, there
is a short to frame in the truck or electrical
noise generated by motors due to bad
brushes, worn commutators or faulty
suppressors. The sensor coils are picking
up this noise.
8. Locate and repair the short to frame or
faulty component.
00700-CL222-05, 1 5 March 2005
guidance coils (2 right, 2 left)