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Home >> GMC >> 1992 >> Forward Control 5.7 K, Standard >> Repair and Diagnosis (Single Page) >> Transmission >> Automatic Trans >> Diagnosis - A/T >> Torque Converter Clutch Charts (Trucks) >> Chart C-8 Torque Converter Clutch - 4.3L Turbo PFI >> Diagnostic Aids

Diagnostic Aids

Solenoid Coil resistance must measure more than 20 ohms. Less resistance will cause early failure of ECM driver. Before installing a replacement ECM, use a DVOM to check solenoid coil resistance of all ECM controlled solenoids and relays. Replace any solenoid or relay that measures less than 20 ohms resistance.

Fig 1: Chart C-8, TCC Troubleshooting Chart (4.3L Turbo PFI)
G92E13726Courtesy of GENERAL MOTORS CORP.
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