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Diagnostic Aids

Solenoid coil resistance must measure more than 20 ohms. Less resistance will cause early failure of the ECM driver. Before replacing ECM, 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: TCC Electrical Diagnosis - Computer Command Control (2.5L & 2.8L) Flowchart
GB0044471
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