TM 5-2420-231-23-1
0061
Table 1. 4-Wheel Drive (4WD) Does Not Engage - Continued.
061
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
4-Wheel Drive (4WD) Does
Test Step 22. Verify That Symptom Is
Not Engage - Continued
Resolved.
1. Ensure that all wiring harness con-
nectors are connected.
2. Place powershift lever in the N
position and apply parking brake
(TM 5-2420-231-10).
NOTE
Refer to How To Use On-Board Diagnostics (WP 0006) to understand the
front display screen indicators.
3. While holding M button on front
display panel (WP 0006), start and
idle machine (TM 5-2420-231-10).
4. Press M button (WP 0006) to enter
input test mode ("It"), and monitor
and record the 4WD switch input.
5. Activate 4WD switch (TM 5-2420-
Front Display Screen Illuminates the
231-10).
4WD Switch Input - Deactivate the
4WD switch (TM 5-2420-231-10).
Proceed to step 6.
Front Display Screen Does Not
Illuminate the 4WD Switch Input -
Repeat troubleshooting from the
beginning.
NOTE
Ensure that the brake pedal lock lever is engaged during this test (TM 5-
2420-231-10).
6. Apply and hold brake pedal (TM 5-
2420-231-10).
7. Using front display screen (WP
Front Display Screen Illuminates the
0006), monitor and record brake
Brake Pressure Switch Input -
pressure switch input.
Troubleshooting complete.
Front Display Screen Does Not
Illuminate the Brake Pressure Switch
Input - Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0061-18
