How to bleed ABS actuator? - Nissan Frontier Forum
 
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#1 (permalink) Old 10-11-2010, 04:38 PM
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How to bleed ABS actuator?

Hey all,

I've just replaced my rotors and pads, replaced the brake master cylinder, flushed the brake system with new fluid, and bled the master cylinder and all 4 brakes in the order outlined by the Nissan Service Manual listed below (page 11). Unfortunately, even after all this, I still can't get the brakes to lock up (or the ABS to activate) when I jam the pedal to the floor. My question is how do I bleed the ABS actuator and electric unit? Is there a nipple? If so where, because I can't find it.

Bleed air in the following order.
1. LSV air bleeder (Models equipped with LSV)
2. Left rear brake
3. Right rear brake
4. Left front brake
5. Right front brake
6. ABS actuator (KA24DE) or ABS actuator and electric unit
(VG33E and VG33ER)

This is on a 2001 Frontier 4x4 VG33E.

Last edited by SlyJhereg; 10-11-2010 at 04:46 PM.
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#2 (permalink) Old 10-11-2010, 07:09 PM
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Unless you have a power bleeder, you'll either have to disconnect the harness plug from the unit or disconnect the battery. Then have someone pump and hold the pedal while you crack the lines. If I'm reading it right, you should have bench bled the master cylinder before installing it.

Last edited by nissanmadness; 10-11-2010 at 07:12 PM.
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#3 (permalink) Old 10-11-2010, 07:58 PM
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Usually, you have to have the dealer bleed the brakes if there is air in the ABS system. They have to hook it up to a computer in order for the correct valves to open in the ABS module so that the air can escape. Otherwise, you will never get it out.

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#4 (permalink) Old 10-12-2010, 02:30 PM
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Thanks for the info guys, I had no idea I would have to get the stealership involved! I called the local Nissan dealer and they said I should never have to bleed the ABS and it is likely my back brakes that need adjustment. His quote, "There is no such thing as self-adjusting brakes." I'll check 'em out when it stops raining.

So my question now is if I have air in my ABS will it trigger a light on my dash and will the air in the ABS cause poor clamping pressure resulting in my not being able to lock up the brakes? Also, does changing the master cylinder introduce air into the ABS system?

p.s. - yes, I did bench bleed the master cylinder

Last edited by SlyJhereg; 10-12-2010 at 02:33 PM.
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#5 (permalink) Old 10-13-2010, 09:59 PM
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I bled my brakes with a Motive brand bleeder with excellent results.

2014 SV V6 Kingcab 4WD
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#6 (permalink) Old 10-13-2010, 11:08 PM
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Quote:
Originally Posted by SlyJhereg View Post
Thanks for the info guys, I had no idea I would have to get the stealership involved! I called the local Nissan dealer and they said I should never have to bleed the ABS and it is likely my back brakes that need adjustment. His quote, "There is no such thing as self-adjusting brakes." I'll check 'em out when it stops raining.

So my question now is if I have air in my ABS will it trigger a light on my dash and will the air in the ABS cause poor clamping pressure resulting in my not being able to lock up the brakes? Also, does changing the master cylinder introduce air into the ABS system?

p.s. - yes, I did bench bleed the master cylinder
First off, there are self adjusting brakes. That guy is an idiot. There are star adjusters on drum brakes that adjust out and keep themselves against the drum as it wears. Let me ask you this... if you pump the pedal, does it make the pedal firmer? If so, you have air in the system. If it doesn't change anything, then it sounds like the rear drums are out of adjustment OR the pushrod going to the master cyl needs to be adjusted a little.

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#7 (permalink) Old 10-15-2010, 06:52 PM
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He probably meant that the self adjusters are trash. I always adjust mine by hand.


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#8 (permalink) Old 10-17-2010, 02:09 PM
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i got 95000 miles on my 04, original rear brake shoes, i adjusted the rear by hand turning the adjuster star, after a couple thousand mile there not grabing compared to when the truck was new, i even sanded the shoes and drums . but i wont do this again, i used brake fluid that was opened 3or4 years ago, i am thinking my brake fluid got moisture in it .So when i add brake fluid now, i will always buy a new can, top it off then throw the unused brake fluid out . the haynes manual says use brake fluid from only a sealed container.
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