TM 5-2420-231-23-1
0054
Table 1. Transmission Has Hard Shift or Machine Loses Speed After
Changing Direction - Continued.
054
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Transmission Has Hard Shift
Test Step 4. Test Direction
or Machine Loses Speed
Modulation Solenoid Output Control
After Changing Direction -
and Common Circuits.
Continued
1. Remove front floor cover plate
(WP 0306).
2. Disconnect powershift wiring har-
ness connector (WP 0007, Figure
146) from transmission (WP 0007,
Figure 147) (WP 0167).
3. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 4.
shift connector wiring harness
Resistance Greater Than 5.0 Ohms -
connector (WP 0007, Figure 20)
Replace powershift wiring harness (WP
terminal C1 and powershift wiring
0167).
harness connector (WP 0007, Fig-
Proceed to Test Step 10.
ure 146) terminal G. Resistance
should be 5.0 ohms or less.
4. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Replace transmission (WP 0213).
shift connector wiring harness
Proceed to Test Step 10.
connector (WP 0007, Figure 20)
Resistance Greater Than 5.0 Ohms -
terminal K1 and powershift wiring
Replace powershift wiring harness (WP
harness connector (WP 0007, Fig-
0167).
ure 146) terminal M. Resistance
Proceed to Test Step 10.
should be 5.0 ohms or less.
Test Step 5. Test Direction
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).
2. Remove instrument panel front
cover (WP 0174).
3. Remove front floor cover plate
(WP 0306).
4. Disconnect powershift wiring har-
ness connector (WP 0007, Figure
146) from transmission (WP 0007,
Figure 147) (WP 0167).
5. Using a digital multimeter, test for
Continuity - Replace powershift wiring
continuity between powershift con-
harness (WP 0167).
nector wiring harness connector
Proceed to Test Step 10.
(WP 0007, Figure 20) terminal C1
No Continuity - Replace transmission
and all other terminals on harness.
controller (WP 0168).
There should be no continuity.
Proceed to Test Step 10.
0054-4