Parasitic Draw Check

-1. Make sure the 12 volt battery is fully charged, and that all the vehicle's electrical accessories are turned off.

-2. To make the security alarm system recognize that the door is closed, open the hood, and disconnect the hood latch switch 2P connector.

-3. Connect the hood latch switch 2P connector terminals No. 1 and No. 2 with a jumper wire.

-4. Turn the vehicle to the ON mode.

-5. Turn the vehicle to the OFF (LOCK) mode.

-6. Get out of the vehicle, and close all doors and tailgate securely.

-7. Lock the doors with the keyless remote.

-8. Make sure the individual map lights are turned off, and the security alarm system is armed.

-9. Wait for at least 20 minutes.

-10. Check the following items before measuring:

• Set the multimeter dial to the DCA (direct current amps) range.
• Plug the red test probe into the red A (Amps) jack, and plug the black test probe into the COM jack.
• To avoid blowing an input fuse, start by setting the range above 10 A.

-11. Loosen the nut (A) on the 12 volt battery negative terminal.

NOTE:  Follow the instructions exactly to avoid disconnecting the 12 volt battery ground cable terminal from the 12 volt battery negative terminal.

Courtesy of HONDA, U.S.A., INC.

-12. Connect the red (+) test lead (A) to the 12 volt battery ground cable terminal (B).

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-13. Carefully slide the 12 volt battery ground cable terminal upwards from the 12 volt battery negative terminal post to maintain contact and avoid disconnection. Then connect the black (-) test lead (C) to the 12 volt battery negative terminal post.

-14. Disconnect the 12 volt battery ground cable terminal (A) from the 12 volt battery negative terminal.

Courtesy of HONDA, U.S.A., INC.

-15. Measure the parasitic draw.

NOTE:  If the measured value is over the threshold, wait 10 minutes and recheck.

Is the measured valued less than the threshold?

YES 

Intermittent failure, the system is normal at this time.

NO 

Go to step 2.

-1. Check if there are any aftermarket electrical accessories installed on the vehicle.

Are there any aftermarket electrical accessories installed?

YES 

Remove any installed aftermarket accessories and do parasitic draw tests again.

NO 

Go to step 3.

-1. Remove the No. B10 fuse  while the test leads are connected, and measure the parasitic draw.

Is the measured valued less than the threshold?

YES 

Go to step 4.

NO 

Go to step 5.

-1. Install the No. B10 fuse .

-2. Short the B-CAN_H line to B-CAN_L line with a jumper wire while the test leads are connected.

-3. Turn the vehicle to the ON mode and then the OFF (LOCK) mode.

-4. Get out of the vehicle and close all the doors.

-5. Wait for at least 40 seconds.

-6. Measure the parasitic draw.

Is the measured valued less than the threshold?

YES 

Disconnect the control units from the B-CAN circuit one at a time, perform step 3-6 above, then measure the parasitic draw. Do the input test for the control unit that reduced the parasitic draw to 27.0 mA or less when disconnected.

NO 

Disconnect the control units from the back-up fuse circuit one at a time, perform step 3-6 above, then measure the parasitic draw. Replace the control unit that reduced the parasitic draw to 27.0 mA or less when disconnected.

-1. Remove the No. B1-2  and No. B1-4 fuses  while the test leads are connected.

-2. Turn the vehicle to the ON mode and then the OFF (LOCK) mode.

-3. Get out of the vehicle and close all the doors.

-4. Wait for at least 40 seconds.

-5. Measure the parasitic draw.

Is the measured valued less than the threshold?

YES 

Go to step 6.

NO 

Remove the fuses one at a time, and identify the parts which excessively consume current.

NO 

If all electrical circuits are OK, check the starter system circuit.

NO 

Perform the starter performance test.

-1. Install the No. B1-2  and No. B1-4 fuses 

-2. Disconnect under-dash fuse/relay box connector C (27P) while the test leads are connected, and measure the parasitic draw.

Is the measured valued less than the threshold?

YES 

Replace the Under-dash fuse/relay box.

NO 

Repair a short to ground in the wire between the No. B1-2 fuse. 

NO 

Repair a short to ground in the wire between the No. B1-4 fuse.