TM 5-2420-231-23-1
0051
Table 1. Transmission Does Not Shift into Forward - Continued.
051
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Transmission Does Not Shift
Test Step 4. Verify Transmission
into Forward - Continued
Controller Outputs.
1. Place powershift lever in the N
position (TM 5-2420-231-10).
2. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10).
3. Apply parking brake (TM 5-2420-
231-10).
4. Press and hold M button while
starting machine (TM 5-2420-231-
10).
NOTE
Machine will make noise and surge during output test mode.
5. Continue pressing M button until
output test mode ("ot") and analog
output is on front display screen
6. Apply and hold brake pedal (TM 5-
2420-231-10).
7. Place powershift lever in fourth
gear forward (TM 5-2420-231-10).
8. Monitor and record front display
Front Display Screen Indicates
screen for output 1, output 8, ana-
Output 1 Shorted or Open - Proceed
log output 00, and analog output
to step 9.
01. Each output will display G for a
Front Display Screen Indicates
good circuit, S for a short to
Output 8 or Analog Output 00
ground circuit, or O for an open/
Shorted or Open - Proceed to step 13.
short to voltage circuit.
9. Place powershift lever in second
gear forward (TM 5-2420-231-10).
10. Monitor and record front display
Front Display Screen Indicates
screen for output 1 and 4. Each
Output 1 Shorted or Open - Proceed
output will display G for a good cir-
to step 11.
cuit, S for a short to ground circuit,
Front Display Screen Indicates
or O for an open/short to voltage
Output 4 Shorted or Open - Shift to
circuit.
first gear neutral. Press M button until
front display indicates neutral (nA).
Proceed to Test Step 7.
11. Place powershift lever in third gear
forward (TM 5-2420-231-10).
0051-7
