BT OE35, Service Manual

Page: 328 / 332

PS S8.0 8200
001 OE35
Version no T-code
F-code Section C-code
Micro 70 Wire Guidance
326 Service Manual 1997-10-24
b. Check for 5 volts at the black wire on terminal 1 of
the tachometer. If not 5 volts, +/- 0.1 volts, repair
open black wire between FTI 7 and tachometer.
c. Check for 5 volts at the red wire on terminal 2 of the
tachometer. If not 5 volts, +/- 0.1 volts, replace
tachometer.
d. Check for 5 volts at K1-1 on the FTI 7. If not 5 volts,
+/- 0.1 volts, repair open red wire between FTI 7 and
tachometer.
e. While driving the truck in the forward (steer wheel)
direction, check for the voltage at K1-1 to decrease
below 5 volts. The voltage should change smoothly
with a larger change at higher travel speeds. If
voltage does not
decrease smoothly replace
tachometer.
f. While driving the truck in the reverse (load wheel)
direction, check for the voltage at K1-1 to increase
above 5 volts. The voltage should change smoothly
with a larger change at higher travel speeds. If
voltage does not increase smoothly, replace
tachometer.
g. With the truck standing still check for 5 volts at K3-4
on the FTI 7. If not 5 volts, +/- 0.1 volts, replace FTI 7
and readjust system.
h. While driving the truck in the forward (steer wheel)
direction, check for the voltage at K3-4 to decrease
below 5 volts. The voltage should change smoothly
with a larger change at higher travel speeds. If
voltage does not decrease smoothly replace FTI 7.
i. While driving the truck in the reverse (load wheel)
direction, check for the voltage at K3-4 to increase
above 5 volts. The voltage should change smoothly
with a larger change at higher travel speeds. If
voltage does not increase smoothly replace FTI 7.
j. With the truck standing still check for 5 volts at K6-9
on Micro 70 controller. If not 5 volts, +/- 0.1 volts,
repair open wire between FTI 7 and Micro 70
controller.
k. If truck not repaired possible failure of Micro 70
controller.
Return