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Home >> Cadillac >> 2012 >> 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
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Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.
  1. Engine running, verify the scan tool 42V Circuit Voltage parameter on the accessory DC power control module data list is greater than 40V.
    • If less than the specified value refer to Circuit/System Testing.
  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.