Mariner 4WD L4-2.5L (2010)
operation.
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Pinpoint Test D: DTC P0A08, P0A09, P0A10, P0A11, P0A12 and P0A13
High-Voltage Converter/Inverter
Pinpoint Tests
Pinpoint Test D: DTC P0A08, P0A09, P0A10, P0A11, P0A12 and P0A13
Normal Operation
The PCM controls the DC/DC enable hardwired signal to switch the DC/DC converter on and off. The DC/DC converter provides feedback to the PCM
using the hardwired DC/DC fault signal. The DC/DC fault signal indicates to the PCM when the converter is non-operational or when a fault has
occurred.
This pinpoint test is intended to diagnose the following:
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DC/DC converter
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High-voltage cable assembly
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PCM
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Electronically Controlled Continuously Variable Transmission (eCVT)
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DC/DC converter high-voltage wire harness
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Wiring, terminals or connectors
PINPOINT TEST D: DTCs P0A08, P0A09, P0A10, P0A11, P0A12 AND P0A13
WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to
depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its
components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage
components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious
personal injury or death.
NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.
NOTE: The 12-volt battery must be sufficiently charged before carrying out any DC/DC converter system diagnostics.
NOTE: The High Voltage Traction Battery (HVTB) must be at a minimum state of charge of 35% in order for the PCM to activate the DC/DC
converter enable circuit in the KOER position.
NOTE: DTC P0A09 set alone as a Continuous Memory Diagnostic Trouble Code (CMDTC) indicates an intermittent DC/DC fault circuit failure or
that battery voltage has dropped below a preset limit.