TM 5-2420-231-23-1
0052
Table 1. Transmission Does Not Shift into Reverse - Continued.
052
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Transmission Does Not Shift
Test Step 37. Test Forward Control
into Reverse - 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 - Install instrument panel
continuity between powershift con-
front cover (WP 0174).
troller wiring harness connector
Replace powershift wiring harness (WP
(WP 0007, Figure 20) terminal D2
0167).
and all other terminals on harness.
Proceed to Test Step 38.
There should be no continuity.
No Continuity - Install instrument panel
front cover (WP 0174).
Replace transmission controller (WP
0168).
Connect main chassis harness (WP
0007, Figure 101) to FWD/REV jumper
harness (WP 0007, Figure 102).
Connect FWD/REV jumper harness
(WP 0007, Figure 103) to powershift
wiring harness (WP 0007, Figure 104).
Install front floor cover plate (WP 0306).
Proceed to Test Step 38.
0052-42