RS 6 V8-4.2L Turbo (BCY) (2003)
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Disconnect connector item -3- at Mass air flow sensor -G246-, cylinder bank 2.
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Connect multimeter for voltage measurement as follows.
Connector
Measure to
Contact
2
Engine Ground
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Briefly operate starter.
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Specification: approx. battery voltage
If reading does not match specification:
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Check for open circuit/short to Ground in wiring from contact 2 of connector via fuse to fuel pump relay.
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Eliminate open circuit in wiring/short circuit if necessary.
If reading matches specification:
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Connect multimeter for voltage measurement between contacts 2 and 3 of connector.
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Briefly operate starter (engine may start).