Harness Tester LEDs for Transmission Shift
Control Outputs to Solenoids
TRANSMISSION SHIFT CONTROL POSITION
Place transmission control lever
(a) If different than shown in
in F6. The checkout kit readout
should show T:0000, E:840-860,
C:F6, and G:F1.
(b) If neither the red nor green
LEDs light when expected, check
harnesses and APC 100 fuse
connections/ components. If fuse
(a) Turbine rpm (T:) should be
is blown in fuse and relay box
slightly less engine rpm (E:).
check for ground in carrier
(b) If turbine rpm is considerably
greater (more than 100 rpm) than
(c) If LED in right column lights
engine rpm or if either value
but LED in left column does not,
varies erratically, check the
check fuse in harness tester. If
speed sensors and cables for
fuse is blown, check that solenoid
incorrect or faulty connections.
for reversed wiring at 12 pin
(c) Check that LEDs 12, 14 and
15 for gear F1 are green as
recheck for correct inputs as
The order of the transmission solenoids
from top to bottom and the harness tester
LEDs from top to bottom is the same.
(d) Have an assistant check the
(d) If a red LED lights, the leads for
These should match
Table 2-3-2. If not, check the
harness. Correct and recheck.
APC 100 fuse and relay box for
(e) If both the red and green LEDs
light, check the ground circuit in
Accelerate engine enough for
the harness for an open or poor
transmission to shift to F2 and
checkout kit as shown in Table 2-
3-3 and on harness tester as
Check APC 100 fuse and relay box
Repeat steps (4) and (5) for each
Place crane on outriggers.
Restart engine from carrier cab
and apply brakes.