Parasitic Draw Check
Parasitic Draw Check
1.
Parasitic draw check 1:

Parasitic draw check 1
?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 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 tailgate securely.

?7.
Lock the doors with the keyless transmitter or remote.

?8.
Make sure the front individual map light is 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.


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


?13.
Carefully slide the negative terminal of the 12 volt battery ground cable 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.
NOTE: If disconnection occurs, this could give you erroneous readings.

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


?15.
Measure the parasitic draw.
NOTE: If the measured value is over the threshold, wait 10 minutes and recheck.

12 volt battery size
Threshold of the parasitic draw
55B24
27.0 mA
70D23
36.0 mA

Is the measured valued less than the threshold?

     
YES
     
     
     
Intermittent failure, the system is normal at this time.?
     
NO
     
     
     
Go to step 2.
2.
Electrical equipment check 1:

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 3.
     
NO
     
     
     
Go to step 5.
3.
Electrical equipment check 2:

Electrical equipment check 2
?1.
Make sure that the aftermarket electrical accessories have been properly installed.
NOTE: Check that the harness connected with the ACCESSORY, IG1, or IG2 line is not connected with the +B line.

Are the aftermarket electrical accessories installed correctly?

     
YES
     
     
     
Go to step 4.
     
NO
     
     
     
Repair, reinstall, or remove the aftermarket electrical accessories, then recheck.?
4.
Electrical equipment check 3:

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.
12 volt battery size
Threshold of the parasitic draw
55B24
27.0 mA
70D23
36.0 mA

Is the measured valued less than the threshold?

     
YES
     
     
     
Replace, remove, or repair the aftermarket electrical accessories that reduced the threshold of the parasitic draw or less when disconnected.?
     
NO
     
     
     
Go to step 5.
5.
Parasitic draw check 2:

Parasitic draw check 2
?1.
Remove the No. A29 (10 A) fuse in the under-hood fuse/relay box while the test leads are connected, and measure the parasitic draw.
12 volt battery size
Threshold of the parasitic draw
55B24
14.0 mA
70D23
22.0 mA

Is the measured valued less than the threshold?

     
YES
     
     
     
Go to step 6.
     
NO
     
     
     
Go to step 7.
6.
Parasitic draw check 3:

Parasitic draw check 3
?1.
Install the No. A29 (10 A) fuse in the under-hood fuse/relay 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.
12 volt battery size
Threshold of the parasitic draw
55B24
27.0 mA
70D23
36.0 mA

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 threshold of the parasitic draw 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 threshold of the parasitic draw or less when disconnected.?
7.
Parasitic draw check 3:

Parasitic draw check 3
?1.
Remove the No. A2-1 (50 A)*1, No. A3-3 (30 A)*2, and No. A3-4 (30 A)*2 fuse in the under-hood fuse/relay box while the test leads are connected.
*1: Without keyless access system
*2: With keyless access system

?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.
12 volt battery size
Threshold of the parasitic draw
55B24
27.0 mA
70D23
36.0 mA

Is the measured valued less than the threshold?

     
YES
     
     
     
Go to step 8.
     
NO
     
     
     
Remove the fuses from the under-hood fuse/relay 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.?
8.
Parasitic draw check 4:

Parasitic draw check 4
?1.
Install the No. A2-1 (50 A)*1, No. A3-3 (30 A)*2, and No. A3-4 (30 A)*2 fuse in the under-hood fuse/relay box.
*1: Without keyless access system
*2: With keyless access system

?2.
Remove the ignition switch*1 or under-dash subrelay box*2 while the test leads are connected, and measure the parasitic draw.
12 volt battery size
Threshold of the parasitic draw
55B24
27.0 mA
70D23
36.0 mA

Is the measured valued less than the threshold?

     
YES
     
     
     
     
NO
     
     
     
Repair a short to ground in the wire between the No. A2-1 (50 A)*1, No. A3-3 (30 A)*2, and No. A3-4 (30 A)*2 fuse in the under-hood fuse/relay box and the under-dash subrelay box (with keyless access system) or the ignition switch (without keyless access system).?
*1: Without keyless access system
*2: With keyless access system