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Servicing injection system
General notes on injection
Servicing ignition part
=> Repair group 28
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◆ The engine control unit is equipped with self-diagnosis. Before carrying out repairs and fault finding the fault memory must be interrogated. Also the vacuum hoses and connections must be checked (unmetered air).
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◆ Fuel hoses in engine compartment must only be secured with spring type clips. The use of clamp or screw type clips is not permissible.
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◆ Components marked with * are checked via the self diagnosis
, interrogating and erasing fault memory.
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◆ Components marked with **can be checked with the final control diagnosis => Page 01-57
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◆ For trouble-free operation of the electrical components, a voltage of at least 11.5 V is necessary.
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◆ Do not use sealants containing silicone. Particles of silicone drawn into the engine, will not be burnt in the engine and damage the Lambda probe.
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◆ If the engine starts, runs for a short period and then stops, after fault finding, repairs or component tests, then the fault may lie with the immobilizer which is blocking the engine control unit. The fault memory must be interrogated and if necessary the control unit matched => Page 24-115
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◆ During some checks it is possible that the control unit will recognise and store a fault. Therefore after completing all checks and repairs the fault memory must be interrogated and if necessary erased.
=> Page 01-9
, interrogating and erasing fault memory
Vehicles 05.98▸
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◆ Vehicles with an airbag are fitted with a crash/fuel shut-off. It reduces the risk of a vehicle burning in the event of a crash as the fuel pump is switched off by the fuel pump relay. At the same time this device improves the starting of the engine. When the driver's door is opened, the fuel pump is activated for 2 seconds so that pressure can build up in the fuel system. For safety reasons the fuse must therefore be removed from the fuel pump before the fuel system is opened.
Safety precautions
Rules for cleanliness => Page 24-24
Technical data => Page 24-25
Checking engine operation => Page 24-91
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