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Home >> Cadillac >> 2007 >> Escalade EXT >> Repair and Diagnosis >> External Pages >> Different car >> Section 1860 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P0C2B >> Circuit/System Verification
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Circuit/System Verification

WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
  1. Verify that DTC B1433 is not set.
  2. Ignition ON, engine OFF, command the Aux. Trans. Pump Speed to 50 percent with the scan tool, maintain pump operation for at least 60 seconds while observing the hybrid powertrain control module aux. trans. fluid pump actual and the aux. trans. fluid pump commanded parameter. The actual parameter should remain within 10 percent of commanded value during the 60 second test.
    • If not within the specified range, refer to Circuit System Testing.
  3. While commanding the aux. trans. fluid pump speed to 50 percent observe and record the hybrid powertrain control module Aux. Trans. Fluid Pump Fault Status 1 and the hybrid powertrain control module Aux. Trans. Fluid Pump Fault Status 2 parameters. Both readings should display No Fault.
    • If the reading displays No PWM Response, refer to Circuit System Testing.
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