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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Wiring Systems And Power Management - Service, Troubleshooting & Diagnosis) >> Retained Accessory Power (RAP) Malfunction >> Circuit/System Verification >> Relay RAP

Relay RAP

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  1. Ignition ON, observe the following scan tool parameters in the BCM while opening and closing each vehicle door. The reading should change appropriately between Door Closed/Door Ajar.
    • Driver Door Ajar Sw.
    • Left Rear Door Ajar Sw.
    • Passenger Door Ajar Sw.
    • Right Rear Door Ajar Sw.
  2. Command the scan tool Accy/RAP Relay OFF. Attempt to operate any RAP relay controlled component within 5 seconds. The component should not operate.
  3. Command the scan tool Accy/RAP Relay ON. Attempt to operate any RAP relay controlled component within 5 seconds. The component should operate.
  4. Ignition ON, all doors closed. Observe the scan tool parameter Accy/RAP Relay Command. Ignition OFF, key removed, the reading should remain ON for approximately 10 minutes then change to OFF.
    • If the parameter does not respond as specified, replace the BCM.
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