DTC P1560 BACK-UP VOLTAGE CIRCUIT MALFUNCTION
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DTC P1560 BACK-UP VOLTAGE CIRCUIT MALFUNCTION
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Detect open or short circuit of the back-up
voltage circuit.
Judge NG when the back-up voltage becomes
smaller than the battery voltage.
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Secondary
Parameter
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Enable
Condition
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None
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Always perform the diagnosis continuously.
Abnormality Judgment
Judge NG when the continuous time of completing
the malfunction criteria below becomes more than 2.5 seconds.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Voltage
of back-up power
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< Battery
voltage × 0.7
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Battery
voltage
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≥ 10.9
V
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Before
and after starting the engine
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After starting
the engine
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Time Needed for Diagnosis:
2.5
seconds
Malfunction Indicator
Light Illumination:
Illuminates as soon as malfunction occurs.
Normality Judgment
Judge OK and clear NG when the malfunction
criteria below is completed.
Judgment
Value
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Malfunction
Criteria
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Threshold
Value
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Voltage
of back-up power supply
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≥ Battery
voltage × 0.7
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Battery
voltage
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≥ 10.9
V
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Before
and after starting the engine
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After starting
the engine
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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)
