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Page 1 Hints and Tips: Audi |
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ENGINE DOESN'T START FAULT: Engine doesn't start or stalls briefly after the start - ECU disabled CAUSE: The ECU is intermittently disabled Because of a fault in the immobiliser (transponder).Due to corrosion on the connectors of the immobiliser control unit there are often loose connections. SOLUTION: If the immobiliser control unit has no fault stored, the cause is a loose contact or an excessive transition resistance on connectors or earth connection. · Check the earth cable and earth contact for the immobiliser control unit. · The cables of the control unit must be routed free of tension. · With height adjustable steering wheels make sure the cable to the reading coil has enough clearance. Observe the maximum adjustment range of the steering wheel. · Attach the loose cable from the reading coil with a cable binder at a suitable point, as near to the control unit as possible. In case of persistent complaints replace both control unit and reading coil with tin-plated contacts or with gold-plated contacts. A mixed installation of tin-plated and gold-plated contacts is causes corrosion.· The old part number of the control unit is indicated using the V.A.G 1551 · For identification the new control unit has a brown mark or the plug end is brown
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