TM 5-2420-231-23-1
0057
Table 1. Transmission Has Uncommanded Upshift - Continued.
057
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7. Using a digital multimeter, mea-
Transmission Has
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 8.
Uncommanded Upshift -
shift connector wiring harness
Continued
Resistance Greater Than 5.0 Ohms -
connector (WP 0007, Figure 20)
Replace powershift wiring harness (WP
terminal D1 and powershift wiring
0167).
harness connector (WP 0007, Fig-
Proceed to Test Step 5.
ure 146) terminal D. Resistance
should be 5.0 ohms or less.
8. Using a digital multimeter, mea-
Resistance 5.0 Ohms or Less -
sure resistance between power-
Proceed to step 9.
shift connector wiring harness
Resistance Greater Than 5.0 Ohms -
connector (WP 0007, Figure 20)
Replace powershift wiring harness (WP
terminal E1 and powershift wiring
0167).
harness connector (WP 0007, Fig-
Proceed to Test Step 5.
ure 146) terminal B. Resistance
should be 5.0 ohms or less.
9. 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 5.
connector (WP 0007, Figure 20)
Resistance Greater Than 5.0 Ohms -
terminal B1 and powershift wiring
Replace powershift wiring harness (WP
harness connector (WP 0007, Fig-
0167).
ure 146) terminal H. Resistance
Proceed to Test Step 5.
should be 5.0 ohms or less.
Test Step 5. Verify That Symptom Is
Resolved.
1. Ensure that all wiring harness con-
nectors are connected.
2. Start and idle machine to normal
operating temperature (TM 5-
2420-231-10).
3. Operate machine in forward and
Transmission Has Uncommanded
Upshift - Repeat troubleshooting from
reverse through each gear selec-
the beginning.
tion. Transmission should shift into
Transmission OK - Troubleshooting
each gear.
complete.
END OF WORK PACKAGE
0057-6