e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)
5.
Is continuity present from
connector P901 pin 4 to
connector P38 pin 1?
CAUTION
Read CAUTION
on following page.
TEST OPTIONS
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
This question eliminates
possible problems and
determines where
troubleshooting continues.
KNOWN INFO
NO
YES
6.
Is continuity present from
connector P38 socket 2 to
a known good ground?
TEST OPTIONS
Continuity Test or
STE/ICE-R Test #91
REASON FOR QUESTION
KNOWN INFO
Replace tachometer
(para 7-21).
YES
NO
If continuity is present,
tachometer is faulty.
Faulty dashboard cable
assembly.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.
POSSIBLE PROBLEMS
Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
Faulty tachometer.
POSSIBLE PROBLEMS
Tachometer illuminates.
VOLTS gage OK.
Engine speed sensor OK.
Auxiliary panel cable assembly
OK.
Go to step 7 of this fault.
Go to step 10 of this fault.
TM 9-2320-365-20-1
2-354 Change 1
