Toyota 7BPUE15, Руководство по обслуживанию

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Toyota Orderpicker Model
15
Service Manual Section
8.
W i r e Guidance
Speed Feedback Encoder Test
This test should be r u n when the guidance
system is not functioning properly.
1. Verify the speed feedback encoder is
mounted securely to the drive motor.
2. J a c k and block the truck.
3.
Enter maintenance mode and travel
slowly. See "Maintenance Mode" on
page 6-4. The rate of horn chirps should
increase a s travel increases. Test the
encoder in both travel directions.
a. If the chirp rate does not change a s
travel speed changes, or if there are no
horn chirps, go to step 4.
b. If the chirp rate changes with the travel
speed, the speed feedback encoder is
good.
4. Manually flex the encoder wires and listen
to the chirp rate.
a. If there are inconsistencies in the chirp
rate, check the wiring from J H 6 to
for continuity or damage. Repair or
replace faulty wiring.
b. If there are
no inconsistencies
in the
chirp rate, replace the encoder
assembly.
5. Verify 12 volts is available a t J P S 1- 19 on
the steer controller. If not, replace the
steer controller.
6. Verify DGND is available a t J P S 1
-
12 on
the steer controller. If not, replace the
steer controller.
7. Rotate the speed feedback encoder while
checking J P S 1-8 with respect to J P S 1 12.
As the encoder rotates, the voltage should
change between approximately 12 and
volts. If the voltage does not change,
replace the encoder.
8. Rotate the speed feedback encoder while
checking J P S 1-7 with respect to J P S 1
-
12.
As the encoder rotates, the voltage should
change between approximately 12 and
volts. If the voltage does not change,
replace the encoder.
Tests
9. If voltages are good in steps 7 and 8,
replace the guidance manager.
Steer Feedback Encoder Test
This test should be r u n when the guidance
system is not functioning properly.
1. Verify the steer feedback encoder is
mounted securely to the steer motor.
2. Enter maintenance mode. See
"Maintenance Mode" on page 6-4.
3. Step on the pedal and rotate the
steering wheel a t different rates of speed.
4. The rate of the horn chirps should
increase a s you t u r n the steering wheel
faster.
a. If the chirp rate does not change, or
the horn does not chirp, go to step 5.
b. If the chirp rate does change with the
steering rate, the encoder is good. Do
not finish the test.
5. Check the wiring from J H 7 to JT6 for
continuity or damage. Repair or replace
faulty wiring.
6. Verify 5 volts is present a t If not,
change the manager.
7. Verify DGND is present a t If not,
change the manager.
8. Measure the voltage a t 1 with
respect to and t u r n the steering
wheel. The voltage should cycle between
approximately 5 and volts a s the encoder
turns. If not, replace the steer feedback
encoder.
9.
Measure the voltage a t with
respect to and t u r n the steering
wheel. The voltage should cycle between
approximately 5 and volts a s the encoder
turns. If not, replace the
manager.
Wire Guidance Sensor Test
This test should be r u n when the guidance
system is not functioning properly. This test
assumes that all other components of the
guidance system have checked good.
00700-CL222-05, 1 5
March
2005