View source for 12V Power Always On

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When the entire 12V circuit stays, ''despite'' keying the bike off and disconnecting charging sources.
: This may be continuous or intermittent.

; Related Confirming Symptoms
: With the ignition is keyed '''off''', the key removed, and the bike unplugged from charging sources:
* Headlamp and running/brake light are ''both'' '''on'''.
* [[Gen2/Instrument Cluster|Dash/instrument cluster]] backlight is '''on''' but the bike '''does not operate'''.

; Potential Causes
* [[Ignition Switch]] is faulty.
* [[DC-DC 12V Converter]] is faulty.
* [[MBB]] is faulty, sending an enable signal to the DC-DC converter.

;Risks
: This will slowly drain the battery.
:: A continuous use of the headlamp might drain the battery in a week's time or less.
:: Time to discharge (hours) = SoC (%) / 100 &times; capacity (kWh) &times; 1000 / 55W.
: If the condition is a result of a short circuit around the [[DC-DC 12V Converter]], it may over-discharge the [[MBB]], causing failure of that critical component.
:: So try to diagnose and solve this problem as soon as possible!

;Troubleshooting
# With the bike keyed off, check the voltage across the [[Ignition Switch]], ''or'' check if the [[MBB]] is on and whether it reports in the [[MBB Console|console]] that the ignition switch is shut.
# With the bike keyed off and unplugged, access the [[DC-DC 12V Converter]] connector with a voltmeter that has needle probes.
#: On the [[SDS Platform]], you'll need to [[SDS Platform/Board Mounting Plate Removal|remove the board mounting plate]].
# Verify the battery [[State of Charge]] via input/bus voltage:
#: Check voltage present between (+) pin 2 and (-) pin 3.
#: This should be between 95V and 116.2V, and roughly indicates [[State of Charge]].
# Test whether the [[MBB]] is sending the enable signal:
#: Check voltage between (+) pin 1 and (-) pin 3.
#: If this is ''zero'', then the [[DC-DC 12V Converter]] is '''faulty''' independent of the [[MBB]].
#: If this is ''not zero'', then the [[MBB]] is enabling the [[DC-DC 12V Converter]], and is '''faulty'''.
# Confirm output from the [[DC-DC 12V Converter]]:
#: Check 12-14V present between (+) pin 4 and (-) pin 5.
# Test whether the [[DC-DC 12V Converter]] responds to the enable signal:
#: Connect pin 1 directly to pin 2 using a piece of cable.
#: Connect power to (+) pin 2 and (-) pin 3.
#: This should transmit high voltage to the enable input at pin 1, and should make the [[DC-DC 12V Converter]] work if it is functional.

If the [[DC-DC 12V Converter]] is faulty with the [[MBB]] okay, then the bike should run normally, but with a [[Loss of 12V Power]].

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[[Category:Symptom]]