TM-9-2320-280-20-1

TRUCK, UTILITY: M998 SERIES

TECHNICAL MANUAL; UNIT MAINTENANCE; VOLUME 1 OF 3

JANUARY 1996
TM-9-2320-280-20-1

  TM-9-2320-280-20-1 - Page 301 of 888

2-218
Change 2
TM 9-2320-280-20-1
ALTERNATOR
DIAGNOSTIC FLOWCHART
E1
TEST OPTIONS
Visual
REASON FOR QUESTION
Must know model of
alternator to perform proper
tests.
TEST OPTIONS
STE/ICE-R Test 10 and 89
(page 2-734 and 2-750)
REASON FOR QUESTION
Determine if high or low
output voltage.
E2
NO
YES
SEE NOTE ON
OPPOSITE
PAGE
IS THIS A NIEHOFF 200 AMP
SINGLE VOLTAGE ALTERNATOR?
START ENGINE AND ALLOW TO
IDLE AT 1200 - 1500 RPM FOR 2 - 3
MINUTES.
RECHECK VOLTAGE OUTPUT.
IS ALTERNATOR OUTPUT LESS
THAN 26 VOLTS?
NO
IF OUTPUT VOLTAGE IS OVER
30.5 VOLTS, REPLACE REGULATOR,
(Para. 4-114) OR (Para. 4-115).
KNOWN INFO
VOLTAGE OUTPUT
INCORRECT
POSSIBLE PROBLEMS
FUSIBLE LINK
WIRING
ALTERNATOR
REGULATOR
YES
E
FROM B1,
Page 2-204
GO TO E3,
Page 2-218.2


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