S6 V8-4.2L (BBD) (2004)
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Connect hand-held multimeter VAG 1526 (voltage measurement range) between engine Ground and socket 1 of relevant connector.
Specified value: approx. 5 V
Checking signal wiring for CMP sensor
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Switch ignition on.
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Connect hand-held multimeter VAG 1526 (voltage measurement range) between engine Ground and socket 1 of relevant connector.
Specified value: approx. battery voltage
Checking Ground wire for CMP sensor
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Connect hand-held multimeter VAG 1526 for resistance measurement between socket 3 on connector and engine Ground.
Specified value: Continuity Wire resistance: max. 1.5 Ohm
If the specified values are all achieved and the diode test lamp does not flash (measured between contacts 1 and 2 with starter connector attached):
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Replace relevant CMP sensor.
If specifications are not attained, check wiring connections.
Checking wiring between CMP sensor and engine control module.
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Connect test box VAG 1598/31 to wiring harness for engine control module; do not connect engine control module. See: Computers and Control
Systems/Testing and Inspection/Scan Tool Testing and Procedures/Scan Tool Testing/With Manufacturer's Scan Tool/Scan Tool Connecting and
Initial Checks/Connecting VAG 1598/31 Test Box