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
5. Disconnect powershift wiring har-
Transmission Has Hard Shift
ness connector (WP 0007, Figure
or Machine Loses Speed
146) from transmission (WP 0007,
After Changing Direction -
Figure 147) (WP 0167).
Continued
6. 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 H1
No Continuity - Proceed to step 7.
all other terminals on wiring har-
ness, and machine ground. There
should be no continuity.
7. 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 K1,
No Continuity - Replace transmission
all other terminals on harness, and
controller (WP 0168).
machine ground. There should be
Proceed to Test Step 10.
no continuity.
Test Step 8. Test Range Modulation
Circuits for an Open.
1. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 2.
shift connector wiring harness
Resistance Greater Than 5.0 Ohms -
connector (WP 0007, Figure 20)
Replace powershift wiring harness (WP
terminal H1 and powershift wiring
0167).
harness connector (WP 0007, Fig-
Proceed to Test Step 10.
ure 146) terminal K. Resistance
should be 5.0 ohms or less.
2. 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 9. Test Range Modulation
Solenoid Circuits for a Short to
Voltage.
1. Turn ignition switch to the off posi-
tion (TM 5-2420-231-10) and dis-
connect batteries (WP 0157).
2. Disconnect powershift connector
wiring harness connector (WP
0007, Figure 20) from transmission
controller (WP 0168).
0054-6