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Page Title:
CODES 71-78 INJECTOR RESPONSE TIME TOO SHORT (CONT). |
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 TM 9-2320-364-20-1
A4 CODES 71-78 INJECTOR RESPONSE TIME TOO SHORT (CONT).
2.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
Visual inspection.
Is alternator or electrical
comes ON and stays ON.
charging system operating
Fuel OK.
REASON FOR QUESTION
properly?
POSSIBLE PROBLEMS
Fault may be caused by
non-DDEC engine or chassis
Charging system faulty.
components.
Bad injector.
Refer to Electrical
NO
Troubleshooting (Para
2-20, Table 2-38).
YES
3.
KNOWN INFO
TEST OPTIONS
CHECK ENGINE light (CEL)
DDR TEST.
comes ON and stays ON.
Are Codes 71 through 78 the
Fuel OK.
only codes displayed by
REASON FOR QUESTION
Alternator and charging system
DDR?
OK.
Isolate Fault.
POSSIBLE PROBLEMS
Bad injector.
Service other codes
first. Go to Fault
NO
Index (Table 2-16).
YES
Go to A4 Codes 61
through 68 Step 2.
See note on next
page.
2-378
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