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Home >> Buick >> 2016 >> Envision >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Hybrid/EV Energy Storage System) >> Diagnostic Information and Procedures >> DTC P1A5E or P1A5F: Battery Energy Control Module Ignition On/Start Switch >> Circuit/System Verification

Circuit/System Verification

WARNING: This page is about a different car, the 2015 Buick LaCrosse. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON.
  2. Verify the scan tool Hybrid Powertrain Control Module Ignition 1 parameter is 0 V with the ignition OFF and B+ with the ignition ON.
    • If not 0 V with the ignition OFF and B+ with the ignition ON 

      Refer to Circuit/System Testing.

    • If 0 V with the ignition OFF and B+ with the ignition ON 
  3. Verify the scan tool Battery Energy Control Module Power Mode parameter matches the actual vehicle power mode as the ignition is turned ON and OFF.
    • If the parameter does not match the actual power mode 

      Refer to Circuit/System Testing.

    • If the parameter matches the actual power mode 
  4. All OK.
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