Q7 Quattro V8-4.2L (BAR) (2008)
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Connect test box V.A.G 1598/42 to wiring harness with adapter lead V.A.G 1598/39-1 or adapter lead V.A.G 1598/39-2. Clamp test box ground
(GND) clip to battery negative terminal. The procedure will indicate whether engine control module is to be connected to test box or not.
CAUTION:
Risk of destroying electrical components with measuring equipment.
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Before connecting test leads, switch on respective measuring range and observe test conditions.
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Check following wire connection for open circuit and short circuit to ground (GND) and B+:
Harness connector Terminal
V.A.G 1598/42 Bushing
1
B 40
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Repair wiring open circuit or short circuit according to wiring diagram.
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Observe procedures for after reconnecting Engine Control Module (ECM).