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Contents Wiring diagrams Section: OHC Petrol Engine All sections

Engine, Engine Attaching Parts Functional Diagram Opel Astra G

OHC Petrol Engine 1 illustration

Function Diagram

A4Multec engine control unit
A5Motronic engine control unit
A6Simtec engine control unit
A7Diesel engine control unit
A13ATWS control unit
A17Immobiliser control unit
H1.6Engine telltale

For more detailed information on the identification of new units, see section 6.1.

  • Transponder
  • External interrupter relay (optional, for the Netherlands only)
StepProcess
[1.1]Transponder fixed code is requested
[1.2]Calculation of random number in engine control unit
[2.1]Transponder fixed code is checked
[3]Request signal via engine telltale output
[4]Random number is transmitted to the immobiliser control unit
[5]Random number is transmitted to the transponder
[6.1]Alternating code is calculated in the transponder
[6.2]Alternating code is calculated in the engine control unit
[7]Alternating code is transferred from the transponder to the immobiliser control unit
[8]Alternating code is transferred to the engine control unit
[9]Alternating codes are compared and engine functions are authorised

2.18.3 Function Diagram

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