Micro 70 Wire Guidance
PS
S8.0
8200
F-code
Section
C-code
Version no
T-code
001
OE35
© BT Products
325
Service Manual
1997-10-24
on and the Micro 70 system in auto mode.
a. Check for negative (-) 12 volts between K3-1 and
K3-4 on Micro 70 controller. The positive lead of the
volt meter should be on K3-1 and the negative lead
on K3-4. If not negative (-) 12 volts, then possible
Micro 70 controller failure.
b. Check for negative (-) 12 volts between pin 1 and pin
4 of load wheel antenna. The positive lead of the volt
meter should be on pin 1 and the negative lead on
pin 4. If not negative (-) 12 volts, repair open black or
open common wire between Micro 70 controller and
load wheel antenna.
c. Check for positive (+) 12 volts between K3-2 and K3-
4 on Micro 70 controller. The positive lead of the volt
meter should be on K3-2 and the negative lead on
K3-4. If not positive (+) 12 volts, then possible Micro
70 controller failure.
d. Check for positive (+) 12 volts between pin 2 and pin
4 of load wheel antenna. The positive lead of the volt
meter should be on pin 2 and the negative lead on
pin 4. If not positive 12 volts, repair open red or open
common wire between Micro 70 controller and load
wheel antenna.
e. Verify integrity of other leads from load wheel
antenna to Micro 70 controller.
f.
Replace load wheel antenna and readjust Micro 70
controller.
9. Truck will not guide in load wheel direction. "On wire"
light is on but truck is not centered over guidewire and
parking is not set.
The following tests are to be made with the truck power
turned on and the Micro 70 system in auto mode.
Unless otherwise specified, the tests in this chart use
K3-5 on the FTI 7 as the negative connection for the volt
meter.
a. Check for 5 volts at K1-2 on the FTI 7. If not 5 volts,
+/- 0.1 volts, disconnect K1 on FTI 1 and retest. If
still not 5 volts, replace FTI 7 and readjust system.
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