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Home >> Buick >> 2012 >> Regal Base >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (Hybrid/EV Control System) >> Diagnostic Information and Procedures >> DTC P1ADE or P1ADF >> Circuit/System Verification

Circuit/System Verification

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  1. Ignition OFF, measure and record the battery voltage at the C1 12V battery terminals. The battery voltage should stabilize between 12.4 and 12.8 V within a few minutes of turning the ignition OFF.
  2. Engine running, accessories OFF, measure and record the battery voltage at the C1 12V battery terminals. The voltage should be at least 1 V greater than the voltage measured in step 1 but less than 15 V.
  3. Observe the drive motor control module ignition 1 signal voltage parameter with a scan tool. The voltage readings should be within 1 V of the 12V battery voltage.