DTC P0604 INTERNAL CONTROL MODULE RANDOM ACCESS MEMORY (RAM) ERROR
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DTC P0604 INTERNAL CONTROL MODULE RANDOM
ACCESS MEMORY (RAM) ERROR
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Detect the function abnormality of the micro-computer
(RAM).
Normally, zero-clear all the RAM area in
the initial routine. And judge NG when the total of all the RAM
after the clear is not $0000.
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Secondary
Parameters
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Enable
Conditions
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None
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Perform the diagnosis in the initial routine.
Perform the diagnosis immediately after IG
key SW is turned ON.
Judge NG when the malfunction criteria below
are completed. Judge OK and clear NG when the malfunction criteria
below are not completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Total of
all the RAM after the zero-clear the all the normal RAM area.
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Not to
0
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Time Needed for Diagnosis:
Undecided
Malfunction Indicator
Light Illumination:
Illuminates as soon as malfunction occurs.
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•
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When the OK idling cycle was completed 40 times
in a row
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•
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When “Clear Memory” was
performed
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MALFUNCTION
INDICATOR LIGHT CLEAR CONDITION
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•
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When the OK driving cycle was completed 3 times
in a row
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•
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When “Clear Memory” was
performed
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None
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ECM OPERATION
AT DTC SETTING
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Memorize the freeze frame data. (For test
mode $02)
