9-3 SE Hatchback (9400) L4-2.0L Turbo (B205) HO (2000)
Checking That The TCM Control Module Is Active
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Turn the ignition switch to the ON position.
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The CHECK GEARBOX lamp should go on and then off again.
Is the function correct?
NO
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See: No Communication With TCM/Cars With Trionic T5 or Motronic Engine Management System/Checking the TCM Power Supply
YES -
See: No Communication With TCM/Cars With Trionic T5 or Motronic Engine Management System/Checking the Diagnostic Tool
Checking the TCM Power Supply
Checking the TCM Power Supply
Unplug the connector:
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Control module, TCM (502)
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Turn the ignition switch to the ON position.
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Connect test lamp 86 11 857 to pin 1 of the female connector and a good grounding point.
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The test lamp should light.
Checking the wiring harness.