Parasitic Draw Check (2014 2015)
Parasitic Draw Check
Special Tools Required
LH41 AC/DC low current clamp meter, FLULH41A**: Available through the Acura Tool and Equipment Program, 888-424-6857
- Parasitic draw check 1
- 1. Make sure the 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 switch 2P connector.
- 3. Connect the security hood 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 trunk 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. 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: If you are using a digital multimeter: go to step 2.
Is the parasitic draw 42 mA or less?
YES
Intermittent failure, the system is normal at this time.
NO
Go to step 3.
- Parasitic draw check 2
- 1. 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.
- 2. Loosen the nut (A) on the battery negative terminal.
NOTE: Follow the instructions exactly to avoid disconnecting the battery ground cable terminal from the battery negative terminal.
- 3. Connect the red (+) test lead (A) to the negative terminal (B) of the battery ground cable.
- 4. Carefully slide the negative terminal of the battery ground cable upwards from the battery negative terminal post to maintain contact and avoid disconnection. Then connect the black (-) test lead (C) to the battery negative terminal post.
- 5. Disconnect the negative terminal (A) of the battery ground cable from the battery negative terminal.
- 6. Measure the parasitic draw.
NOTE: If the measured value is over the threshold, wait 10 minutes and recheck.
Is the parasitic draw 42 mA or less?
YES
Intermittent failure, the system is normal at this time.
NO
Go to step 3.
- Electrical equipment check 1
- 1. Check if there are any aftermarket electrical accessories installed on the vehicle.
Are there any aftermarket electrical accessories installed?
YES
Go to step 4.
NO
Go to step 6.
- Electrical equipment check 2
- 1. Make sure that the aftermarket electrical accessories have been properly installed.
NOTE: Check that the harness connected with the ACC, IG1, or IG2 line is not connected with the +B line.
Are the aftermarket electrical accessories installed correctly?
YES
Go to step 5.
NO
Repair, reinstall, or remove the aftermarket electrical accessories, then recheck.
- Electrical equipment check 3
- 1. Disconnect the aftermarket electrical accessories one at a time.
- 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 parasitic draw 42 mA or less?
YES
Replace, remove, or repair the aftermarket electrical accessories that reduced the parasitic draw to 42 mA or less when disconnected.
NO
Go to step 6.
- Parasitic draw check 3
- 1. Remove the No. B2-4 (40 A) fuse in the main under-hood fuse box while the test leads are connected, and measure the parasitic draw.
Is the parasitic draw 24. 5 mA or less?
YES
Go to step 7.
NO
Go to step 8.
- Parasitic draw check 4
- 1. Install the No. B2-4 (40 A) fuse in the main under-hood fuse box.
- 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 parasitic draw 42 mA or less?
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 42 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 42 mA or less when disconnected. -
- Parasitic draw check 4
- 1. Remove the No. B3-2 (30 A) and No. B3-7 (30 A) fuses in the main under-hood fuse box 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 parasitic draw 42 mA or less?
YES
Go to step 9.
NO
Remove the No. B3-2 (30 A) and No. B3-7 (30 A) fuses in the main under-hood fuse box 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.
- Parasitic draw check 5
- 1. Install the No. B3-2 (30 A) and No. B3-7 (30 A) fuses in the main under-hood fuse box.
- 2. Remove the under-dash subrelay box connector A (2P) while the test leads are connected, and measure the parasitic draw.
Is the parasitic draw 42 mA or less?
YES
Replace the under-dash subrelay box .
NO
Repair a short to ground in the wire between the No. B3-2 (30 A) fuse in the main under-hood fuse box and under-dash subrelay box.
NO
Repair a short to ground in the wire between the No. B3-7 (30 A) fuse in the main under-hood fuse box and under-dash subrelay box.