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Home >> Cadillac >> 2017 >> Escalade ESV Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 15 (Transfer Case - Mp 3010 (NP0)) >> Diagnostic Information and Procedures >> DTC C0550: Electronic Control Unit (ECU) >> Circuit/System Description

Circuit/System Description

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This is an internal fault detection of the transfer case shift control module (TCCM). This fault is handled inside the TCCM. No external circuits are involved.

At each power-up, the TCCM runs a self-test on the following:

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