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Home >> Pontiac >> 1994 >> Firebird Formula, 2D Convertible, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 5.7L >> ECM/Pcm Code Charts >> Code 90, TCC Solenoid Circuit >> Diagnostic Aids

Diagnostic Aids

Check all connections to transmission pass-through connector. An open in the ignition feed circuit will cause multiple codes to set.

Fig 1: Code 90 Schematic (5.7L) TCC Solenoid Circuit
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Fig 2: Code 90 Flow Chart (5.7L) TCC Solenoid Circuit
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