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 37. Test Reverse Control
into Forward - Continued
Circuit for a Short.
1. Using a digital multimeter, mea-
Voltage 10 to 14 Volts - Proceed to
sure voltage between powershift
step 2.
controller wiring harness connec-
No Voltage - Replace reverse relay
tor (WP 0007, Figure 20) terminal
(WP 0007, Figure 106) (WP 0162).
D2 and machine ground. There
Proceed to Test Step 38.
should be no voltage.
2. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
3. Disconnect front console wiring
harness connector (WP 0007, Fig-
ure 5) from main chassis wiring
harness connector (WP 0007, Fig-
ure 6).
4. Using a digital multimeter, test for
Continuity - Replace front console
continuity between front console
wiring harness (WP 0162).
wiring harness connector (WP
Proceed to Test Step 38.
0007, Figure 5) terminals 3D and
No Continuity - Proceed to step 5.
4D. There should be no continuity.
5. Disconnect main chassis wiring
harness connector (WP 0007, Fig-
ure 99) from FWD/REV jumper
harness (WP 0007, Figure 100).
6. Using a digital multimeter, test for
Continuity - Replace main chassis
continuity between main chassis
wiring harness (WP 0154).
wiring harness connector (WP
Proceed to Test Step 38.
0007, Figure 6) terminals 3D and
No Continuity - Proceed to step 7.
4D. There should be no continuity.
7. Using a digital multimeter, test for
Continuity - Replace powershift wiring
continuity between powershift con-
harness (WP 0167).
troller wiring harness connector
Proceed to Test Step 38.
(WP 0007, Figure 20) terminal D2
No Continuity - Replace transmission
and all other terminals on harness.
controller (WP 0168).
There should be no continuity.
Proceed to Test Step 38.
Test Step 38. Verify That Symptom Is
Resolved.
1. Ensure that all wiring harness con-
nectors are connected.
2. Place powershift lever in the N
position (TM 5-2420-231-10).
3. Connect batteries (WP 0157) and
turn ignition switch to the on posi-
tion (TM 5-2420-231-10).
4. Start and idle machine (TM 5-
2420-231-10).
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