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Home >> Cadillac >> 2009 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Hybrid Engine Electrical System (Hp2)) >> Diagnostic Information and Procedures >> DTC C0895 (PSCM) >> Circuit/System Verification (PSCM)

Circuit/System Verification (PSCM)

WARNING: This page is about a different variant/trim than selected.
  1. Verify that there are no DTCs in the APM that disable the 42-volt circuit, no engine-stall DTCs in the ECM, and no U-codes in any module.
  2. Engine running, accessories OFF, measure and record the battery voltage at the battery terminals. The voltage should be between 12.6-15.0 volts.
  3. Engine running, observe the scan tool PSCM Intermediate Voltage parameter. The voltage should be 37.5-50 volts.
    • If not within the specified range, refer to Voltage Out Of Range At All Times.
  4. Engine running, rotate the steering wheel left and right while stationary. Observe the scan tool PSCM Intermediate Voltage parameter. The voltage should remain greater than 37.5 volts.
    • If the voltage is less than the specified range only when turning the steering wheel, refer to Low Voltage When Turning below.
  5. Operate the vehicle on a bumpy road. Observe the scan tool APM 42V Circuit Maximum parameter. The scan tool 42V Circuit Maximum parameter should be less than 50 volts.
    • If the voltage is greater than the specified range, replace the PSCM.
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