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Home >> Cadillac >> 2013 >> Escalade Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P1A89 >> Circuit/System Verification

Circuit/System Verification

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  1. Engine running, verify the scan tool 42V Circuit Voltage parameter on the accessory DC power control module data list is greater than 40V.
  2. Verify the scan tool 42V Circuit Voltage parameter is greater than 40V, while rotating the steering wheel back and forth while the vehicle is stationary.
    • If less than the specified value, replace the M38 power steering assist motor.
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