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Immobilizer self-diagnosis - immobilizer I (fixed code)
Fault table
Notes:
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◆ Faults occurring in monitored sensors or components are stored in fault memory together with an indication of the type of fault.
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◆ The fault table is arranged according to the 5-digit fault codes on the left.
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◆ Dash panel insert faults may also be displayed, as the immobilizer is an integral part of the dash panel insert.
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◆ All static and sporadic faults are stored in the fault memory:
A fault is recognised as being static if it is present for at least 2 seconds. If a fault is then no longer present, it is stored as being sporadic and "sporadic" also appears on display.
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◆ After switching on ignition, all faults present are set to sporadic and only stored as being static if they are still present after checking.
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◆ Sporadic faults are erased if they do not re-occur in the course of 50 driving cycles (ignition on for at least 5 minutes, vehicle speed greater than 30 km/h).
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◆ Do not immediately replace components indicated as being defective by VAS 5051, but rather: Start by checking wiring and connectors to these components in line with current flow diagram. Also use current flow diagram to check earth connections. This is particularly important if faults are output as being "sporadic".
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◆ On completion of repair work, fault memory is to be interrogated again and erased.
Attention:
As an additional step on completion of repair work, fault memory of engine control unit is to be read out separately and entry "Engine control unit blocked" erased. Check other faults stored and eliminate if necessary.
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Display on VAS 5051
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Possible cause of trouble
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Fault remedy
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01177
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Engine control unit
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Not authorised
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- Engine control unit not adapted
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- Adapt engine control unit
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- Open circuit in wiring or short circuit at W-wire
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- Use current flow diagram to perform fault-finding
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01179
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Incorrect key programming
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- Ignition keys not properly matched
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- Re-match all ignition keys with entry of PIN and check operation
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65535
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Control unit defective
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- Dash panel insert (with integrated immobilizer) defective
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- Replace dash panel insert
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