A6 Quattro Sedan V6-2.7L Turbo (APB) (2000)
Ignition Coil: Testing and Inspection
Power Output Stages For Ignition Coils, Checking
Power Output Stages For Ignition Coils, Checking
NOTE:
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Power Output Stage -N122 (black connector) activates the ignition coils for cylinder bank 1 (cylinders 1 to 3).
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Power Output Stage 2-N192 (brown connector) activates the ignition coils for cylinder bank 2 (cylinders 4 to 6).
Checking activation of power output stages
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Disconnect harness connectors from all six fuel injectors.
NOTE: It is important to ensure that no fuel is injected during the test as this would damage the catalytic converter The harness connectors on the fuel
injectors must therefore be disconnected.
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Disconnect 4-pin harness connectors on power output stages.
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Connect diode test lamp VAG1527 in turn to the following contacts on the two 4-pin connectors for the power output stages.
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Then, operate starter for a few seconds.
6-pin connector
Specification
on wiring harness,
terminal
1 + Ground (GND)
Diode test lamp should
3 + Ground (GND)
flash (brief impulse)
4 + Ground (GND)
If the specifications are not obtained:
-
Switch ignition off.
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Connect test box VAG 1598/31 to wiring harness for engine control module. Do not connect to the engine control module itself. Refer to "Scan
Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG1598/31 Test Box" See: Computers and Control Systems/Testing and
Inspection