TM 5-2420-231-23-1
0052
Table 1. Transmission Does Not Shift into Reverse - Continued.
052
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. Using a digital multimeter, test for
Continuity - Install instrument panel
Transmission Does Not Shift
continuity between powershift con-
front cover (WP 0174).
into Reverse - Continued
troller wiring harness connector
Replace powershift wiring harness (WP
(WP 0007, Figure 20) terminal C1
0167).
and machine ground. There should
Proceed to Test Step 38.
be no continuity.
No Continuity - Proceed to step 8.
8. 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 H1
0167).
and machine ground. There should
Proceed to Test Step 38.
be no continuity.
No Continuity - Install instrument panel
front cover (WP 0174).
Replace transmission (WP 0213).
Proceed to Test Step 38.
Test Step 22. Test Modulation
Solenoid Voltage Supply Circuit for
an Open or Short.
1. Remove front floor cover plate
(WP 0306).
2. 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 K1
0167).
and machine ground. There should
Proceed to Test Step 38.
be no continuity.
No Continuity - Proceed to step 3.
3. Disconnect powershift wiring har-
ness connector (WP 0007, Figure
146) from transmission (WP 0007,
Figure 147).
4. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less - Install
sure resistance between power-
instrument panel front cover (WP 0174).
shift controller wiring harness
Replace transmission controller (WP
connector (WP 0007, Figure 20)
0168).
terminal K1 and powershift wiring
Connect powershift wiring harness
harness connector (WP 0007, Fig-
connector (WP 0007, Figure 146) to
ure 146) terminal M. Resistance
transmission (WP 0007, Figure 147).
should be 5.0 ohms or less.
Install front floor cover plate (WP 0306).
Proceed to Test Step 38.
Resistance Greater Than 5.0 Ohms -
Replace powershift wiring harness (WP
0167).
Proceed to Test Step 38.
Test Step 23. Test Modulation
Solenoid Control Circuit for a Short.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
0052-27
