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Page Title:
TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT) |
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 TM 9-2320-366-20-1
e14. TACHOMETER DOES NOT OPERATE OR IS INACCURATE (CONT)
CAUTION
Read CAUTION
KNOWN INFO
TEST OPTIONS
on following page.
5.
Continuity Test or
Tachometer illuminates.
STE/ICE-R Test #91
VOLTS gage OK.
Is continuity present from
Engine speed sensor OK.
REASON FOR QUESTION
connector P901 pin 4 to
POSSIBLE PROBLEMS
This question eliminates
connector P38 pin 1?
possible problems and
Faulty dashboard cable
determines where
assembly.
troubleshooting continues.
Faulty auxiliary panel cable
assembly.
Faulty engine control cable
NO
assembly.
Faulty tachometer.
YES
Go to step 7 of this task.
KNOWN INFO
TEST OPTIONS
6.
Continuity Test or
Tachometer illuminates.
STE/ICE-R Test #91
VOLTS gage OK.
Is continuity present from
Engine speed sensor OK.
REASON FOR QUESTION
connector P38 socket 2 to
Auxiliary panel cable assembly
If continuity is present,
a known good ground?
OK.
tachometer is faulty.
POSSIBLE PROBLEMS
Faulty dashboard cable
assembly.
Faulty engine control cable
assembly.
NO
Faulty tachometer.
YES
Go to step 10 of this task.
Replace tachometer
(para 7-21).
2-364
Change 1
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