Mariner 2WD L4-2.5L Hybrid (2010)
C5 CHECK THE POSITIVE 12-VOLT CABLE
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With the engine running (ignition switch ON, engine must have run at least once), headlights on high beam and the heater blower fan on high,
measure the voltage drop between DC/DC converter positive C1457C, post side and 12-volt battery positive C1100A, post side.
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Is the voltage drop less than 0.75 volt?
Yes
GO to C6.
No
REPAIR or INSTALL a new 12-volt battery cable assembly as necessary. REFER to Battery. TEST the system for normal operation.
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C6 CHECK THE NEGATIVE 12-VOLT CABLE
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With the engine running (ignition switch ON, engine must have run at least once), headlights on high beam and the heater blower fan on high,
measure the voltage drop between DC/DC converter negative C1457B, post side and DC/DC converter ground G105, ground bolt side.
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Is the voltage drop less than 0.25 volt?
Yes
GO to C7.
No
REPAIR or INSTALL a new 12-volt battery cable assembly as necessary. REFER to Battery. TEST the system for normal operation.
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C7 CHECK FOR CORRECT DC/DC CONVERTER OPERATION
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Disconnect all of the DC/DC converter connectors.
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Check for:
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corrosion.
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pushed-out pins.
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Connect all of the DC/DC converter connectors and make sure they seat correctly.
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Operate the system and verify the concern is still present.
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Is the concern still present?
Yes
INSTALL a new DC/DC converter. REFER to Direct Current/Direct Current (DC/DC) Converter See: Hybrid Drive Systems/Power Control
System/Voltage Converter/Service and Repair/Direct Current/Direct Current (DC/DC) Converter. TEST the system for normal operation.
No
