LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> Electrical >> Motors, Switches, Relays >> Wiring Systems And Power Management - Service, Troubleshooting & Diagnosis >> Retained Accessory Power (RAP) Malfunction >> Circuit/System Verification

Circuit/System Verification

IMPORTANT: Battery voltage must remain above 9.6 V for RAP to operate properly.

Radio RAP

  1. With all passenger doors closed, observe the courtesy lamps while opening and closing the driver door. The courtesy lamps should illuminate when the door is opened and turn off approximately 30 seconds after closing the door.
  2. If courtesy lamp operation is correct, and the radio is the only RAP concern, replace the radio.

Relay RAP

  1. Ignition ON, observe the appropriate scan tool parameters listed below while opening and closing each vehicle door. The reading should change between Door Closed/Door Ajar.

    Parameter

    • 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 be ON for approximately 10 minutes then change to OFF.
    • If the parameter does not respond as specified, replace the BCM.