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Home >> Cadillac >> 2012 >> Escalade EXT >> Repair and Diagnosis >> Engine Performance >> System >> Data Communications System >> Diagnostic Information and Procedures >> DTC U1816 >> Circuit/System Verification

Circuit/System Verification

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  1. Verify that DTC B137A is not current in the serial data gateway module (SDGM).
  2. Verify that DTC U1816 is not set current only in the HPCM.
    • If the DTC is current in the HPCM only, replace the drive motor power inverter module (PIM).
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