e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)
4.
Is 24 VDC present on
connector P901 pin 3?
KNOWN INFO
TEST OPTIONS
WARNING
CAUTION
Read WARNING and
CAUTION on
following page.
Voltage Test or
STE/ICE-R Test #89
REASON FOR QUESTION
YES
NO
If 24 VDC is not present, wire
1546 is faulty.
Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.
Repair wire 1546 from connector
P913 pin 9 to connector P901
pin 3 (para 2-40) or replace auxiliary
panel cable assembly (para 7-49).
TM 9-2320-365-20-1
2-352 Change 1
