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.
ENGINE DIFFICULT TO START WHEN WARM
AFFECTED MODELS: 1.9L TDI 181 KW only with manual gearbox engine code AFN. FAULT: Engine difficult to start when warm, only after approx. 20 seconds of starter operation. CAUSE: The starter motor is not revving fast enough. SOLUTION: Check the battery. If no fault is found, carry out a test by programming the ECU to automatic gearbox. If the engine then starts normally, replace the starter motor. After replacing the ECU recode to manual gearbox.
ENGINE DOESN’T START OCCASIONALLY
FAULT: Engine doesn’t start occasionally, frequently after a short drive, the ECU is locked CAUSE: The electrical system collapses in jerks when engaging the starter motor. As a result the ECU is locked. Only model year 96 with 44 Ah battery affected. SOLUTION: Check the earth cable from battery to engine and particularly the earth pin on the body below the battery is properly installed.
source : www.ohiodiagnostics.com
Tags : automatic gearbox, earth cable, earth connection, ah battery, loose contact, suitable point, steering wheels, loose connections, starter motor, immobiliser, steering wheel, gearbox, electrical system, recode, jerks
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