brake bleeding

Sorry if this has been asked a zillion times...

Do I need to do anything special to bleed the ABS brakes on my '95 G20? I haven't bled a car with ABS before...

Do I just bleed each wheel cylinder (starting with the farest from the MC of course) the same as I would on a non-ABS car? Do I need to bleed the ABS pump first? Is there a bleed nipple on the ABS pump?

TIA, Ross

just bleed the system like you do on any other car, no need to worry about ABS.

thanks.

what do you guys meen by bleedin your breaks

Originally posted by rossman
Sorry if this has been asked a zillion times...

Do I need to do anything special to bleed the ABS brakes on my '95 G20? I haven't bled a car with ABS before...

Do I just bleed each wheel cylinder (starting with the farest from the MC of course) the same as I would on a non-ABS car? Do I need to bleed the ABS pump first? Is there a bleed nipple on the ABS pump?

TIA, Ross Haynes manual for UK Primera has this in bold type.

Caution: On models equipped with ABS, switch off the ignition and disconnect the battery negative terminal, before carrying out the bleeding procedure.

Not sure why but they must have had a reason for putting it in the manual in bold type. Might be to prevent MILs or maybe to get the system to 'fail' into normal braking mode while you bleed them.

Haynes also lists the sequence for LHD cars as:
RH rear
LH front
LH rear
RH front

I know it seems odd but I'm pretty sure it's because the ABS system modulates the brakes in diagonal pairs.

The Haynes manual makes no mention of a pump bleed nipple anywhere, and in the procedure for refitting of the modulator assembly, just says to bleed the system as above - so, no, you don't have to bleed anything else besides the caliper nipples.

Hope that helps

Thanks for the info T4.

I plan to remove the ABS fuse, but disconnecting the battery may be easier. Maybe both to be on the safe side :).

That sequence is odd. From my inspection it looks like the LH rear wheel has the longest line since all the lines from the master cylinder go to the ABS pump first which is located on the opposite side of the car (RH). But I guess I'll follow what the Haynes manual says.

Ross




Originally posted by T4 Primera
Haynes manual for UK Primera has this in bold type.

Caution: On models equipped with ABS, switch off the ignition and disconnect the battery negative terminal, before carrying out the bleeding procedure.

Not sure why but they must have had a reason for putting it in the manual in bold type. Might be to prevent MILs or maybe to get the system to 'fail' into normal braking mode while you bleed them.

Haynes also lists the sequence for LHD cars as:
RH rear
LH front
LH rear
RH front

I know it seems odd but I'm pretty sure it's because the ABS system modulates the brakes in diagonal pairs.

The Haynes manual makes no mention of a pump bleed nipple anywhere, and in the procedure for refitting of the modulator assembly, just says to bleed the system as above - so, no, you don't have to bleed anything else besides the caliper nipples.

Hope that helps

Originally posted by rossman
Thanks for the info T4.
it looks like the LH rear wheel has the longest line since all the lines from the master cylinder go to the ABS pump first which is located on the opposite side of the car (RH). But I guess I'll follow what the Haynes manual says.

Ross
The old "closest to nearest" sequence comes from when cars had the rear brakes on one circuit and the front on the other.

According to Haynes, the dual circuits have LF+RR on one circuit and RF+LR on the other - so by following the sequence, you will be bleeding one circuit at a time starting with the farthest one in each circuit.

Remember the Haynes manual is for UK Primera, but I wouldn't expect Infiniti to go to the extent of changing the brake system in the G20. Perhaps someone with a FSM could confirm the sequence.