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Parasitic Draw Check

  1. Make sure the battery is fully charged, and that all electrical equipment is turned off.
  2. Open the hood.
  3. Disconnect the hood switch 2P connector to allow the security system to arm itself with the hood open.
  4. Turn the ignition switch to ON (II).
  5. Turn the ignition switch to LOCK (0), and remove the ignition key from the ignition switch.
  6. Get out of the vehicle, and close all doors.
  7. Lock the doors with the keyless transmitter.
  8. Make sure the map lights are turned off and the security alarm system is armed by confirming that the security indicator is flashing.
  9. Wait at least 20 minutes.
  10. Attach the LH41 AC/DC low current clamp meter (A) to the battery ground cable (B) follow the equipment manufacturer's instructions, then measure the parasitic draw.
    NOTE: Using a digital multimeter: go to step  11.
    Fig 1: Identifying Clamp Meter And Battery Ground Cable
    G06953833Courtesy of AMERICAN HONDA MOTOR CO., INC.

    Is the parasitic draw 30 mA or less? 

    YES  Go to  17

    NO  -Go to step  11.

  11. Check the following items before measuring:
    • The multimeter dial is set to the DCA (direct current amps) range.
    • The red test probe is plugged into the red A (Amps) jack, and the black test probe is plugged into the COM jack.
    • To avoid blowing an input fuse, start by setting the range above 10 A.
  12. Loosen the nut (A) from the battery negative terminal.
    NOTE: Be careful not to disconnect the battery ground cable terminal from the battery negative terminal.
    Fig 2: Identifying Nut
    G06953834Courtesy of AMERICAN HONDA MOTOR CO., INC.
  13. Connect the red (+) test lead (A) to the negative terminal (B) of the battery ground cable.
    Fig 3: Identifying Red (+) Test Lead (A), Black (-) Test Lead And Battery Ground Cable
    G06953835Courtesy of AMERICAN HONDA MOTOR CO., INC.
  14. Slide the negative terminal of the battery ground cable upwards from the battery negative terminal post to avoid misconnection. Then connect the black (-) test lead (C) to the battery negative terminal post.
  15. Disconnect the negative terminal (A) of the battery ground cable from the battery negative terminal.
    Fig 4: Identifying Battery Negative Terminal
    G06953836Courtesy of AMERICAN HONDA MOTOR CO., INC.
  16. Measure the parasitic draw.

    Is the parasitic draw 30 mA or less? 

    YES  -The system is normal at this time.

    NO  -Go to step  17.

  17. Check if there are any aftermarket electrical accessories installed on the vehicle.

    Are any aftermarket electrical equipments equipped? 

    YES  -Go to step  18.

    NO  -Go to step  20.

  18. Make sure that the aftermarket electrical equipments have been installed securely.

    Are the aftermarket electrical equipments installed correctly? 

    YES  -Go to step  19.

    NO  -Repair or reinstall the equipment securely, or remove it if needed, then recheck.

  19. Disconnect the aftermarket electrical equipments one at a time, then measure the parasitic draw.
    1. Turn the ignition switch to ON (II), and then back to LOCK (0).
    2. Get out of the vehicle and close all doors.
    3. Wait at least 40 seconds.
    4. Measure the parasitic draw.

    Is the parasitic draw 30 mA or less? 

    YES  -Replace or repair the aftermarket electrical equipment that reduced the parasitic draw to 30 mA or less when disconnected.

    NO  -Go to step  20.

  20. Remove the No. B1 (15 A) fuse in the under-dash fuse/relay box, then measure the parasitic draw.

    Is the parasitic draw 19 mA or less? 

    YES  -Go to step  21.

    NO  -Go to step  23.

  21. Connect immobilizer-keyless control unit 7P connector terminal No. 4 and body ground with a jumper wire.
    Fig 5: Identifying Immobilizer-Keyless Control Unit 7P Connector Terminal
    G06953837Courtesy of AMERICAN HONDA MOTOR CO., INC.
  22. Install the No. B1 (15 A) fuse to the under-dash fuse/relay box, then measure the parasitic draw.
    1. Turn the ignition switch to ON (II), and then back to LOCK(0).
    2. Get out of the vehicle and close all doors.
    3. Wait at least 40 seconds.
    4. Measure the parasitic draw.

    Is the parasitic draw 30 mA or less? 

    YES  -Disconnect the control units from the B-CAN circuit one at a time, perform steps 1-4 above, then measure the parasitic draw. Do the input test for the control unit that reduced the parasitic draw to 30 mA or less when disconnected.

    NO  -Disconnect the control units from the No. B1 (15 A) fuse circuit one at a time, perform steps 1-4 above, then measure the parasitic draw. Replace the control unit that reduced the parasitic draw to 30 mA or less when disconnected.

  23. Remove the No. B60 (IGN) (50 A) fuse in the under-dash fuse/relay box, then measure the parasitic draw.
    1. Turn the ignition switch to ON (II), and then back to LOCK (0).
    2. Get out of the vehicle and close all doors.
    3. Wait at least 40 seconds.
    4. Measure the parasitic draw.

    Is the parasitic draw 30 mA or less? 

    YES  -Go to step  24.

    NO  -Remove the fuse from the fuse box one at a time, then measure the parasitic draw in order to isolate the circuit which contains the fault. If all circuit OK, check the starter circuit and do the starter performance test (see STARTER PERFORMANCE TEST ).

  24. Install the No. B60 (IGN) (50 A) fuse to the under-dash fuse/relay box.
  25. Disconnect the ignition switch 7P connector, then measure the parasitic draw.

    Is the parasitic draw 30 mA or less? 

    YES  -Replace the ignition switch (see IGNITION SWITCH REPLACEMENT ).

    NO  -Repair a short to ground in the wire between the No. B60 (50 A) fuse in the under-dash fuse/relay box and ignition switch.

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