TM 5-2420-231-23-1
0019
Table 1. Tachometer Does Not Function or Is Inaccurate - Continued.
019
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Test Step 6. Verify That Symptom Is
Tachometer Does Not
Resolved.
Function or Is Inaccurate -
Continued
1. Connect all wiring harness con-
nectors and connect batteries (WP
0157).
2. Start and operate engine (TM 5-
2420-231-10) at idle.
3. Monitor and record tachometer
reading (TM 5-2420-231-10).
Tachometer reading should
approximate engine speed.
4. Slowly depress foot throttle (TM 5-
Tachometer OK - Troubleshooting
2420-231-10). Tachometer reading
complete.
should increase smoothly with
Tachometer Reading Erratic,
engine speed.
Inconsistent, Does Not Indicate Any
RPM, or Indicates Maximum RPM or
More - Repeat troubleshooting from the
beginning.
END OF WORK PACKAGE
0019-11/(12 blank)