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ABS CODES

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Old 01-07-2005, 06:46 AM
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Default ABS CODES

I went to the dealership got the codes ran and 3 codes popped up. I need to know what they are so I can get it fixed because I am not paying a labor rate of $63/hr so here they are#1, #1-2, and # 4-8 is the left rear wheel sensor so if anyone can please help me out with what these codes mean I would appreciate it so I can get this ABS taken care of. THank you...oh and its a 94 ACCORD LX 4DR.
Old 01-07-2005, 07:10 AM
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Default Re: ABS CODES (90babyblue)

1 - ABS pump motor over-run

THis means that the pump ran for 2 minutes straight

1 2 ABS pump motor

THis means that there is a circuit problem within

4 8 wheel sensor LR

THis means something is wrong with the speed sensor.


i am not an expert in ABS, but the procedures to test for code 1 is quite extensive. I would google the codes and their meaning to identify the correct troubleshooting procedure.

Now, don't go off half cracked and start changing parts. THe parts may be functionnal. Diagnosis properly. SOrry.

fs
Old 01-07-2005, 07:11 AM
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Default Re: ABS CODES (filthy_shovel)

Here got this for you to start

Honda's anti-lock brake systems (ABS) were first developed in the late 1980s on some models. In 1994, a compact ABS unit, located under the hood, was used primarily on the 1994-'97 Accord and the 1995-'97 Odyssey.

This compact unit featured an ABS pump, modulator and accumulator (an all-in-one unit) with all the solenoids and the pressure switch built into the modulator unit. All Honda ABS systems had a separate reservoir for the ABS brake fluid until the late 1990s. When the ABS reservoir is low or empty, it draws air into the ABS side of the system and causes the ABS light to illuminate.

The most common call I receive is on Code 1. When flashed out, Code 1 is a single flash followed by a 5-second pause that repeats three times. Code 1 is a pump-overrun code. The ABS control unit is programmed to set a Code 1 when it thinks that the pump has been running for more than 45 seconds, or the pressure switch does not close, or if the pressure in the ABS system is insufficient.

Code 1 Diagnostics:

Verify the ABS fluid reservoir is full. If the reservoir is low or empty, there may be air in the ABS system. Always remember the regular brake system and the ABS system should never transfer brake fluid between each other. Fill the reservoir as needed, and perform the following procedure to bleed the air out of the ABS system:

1) Start the engine and allow the ABS pump to run. (If the ABS pump does not run, separate diagnostics will need to be run on the ABS pump motor operation.)

2) When the ABS pump stops running, attach a hose to the brake bleeder on top of the ABS unit and run it into a container.

3) Open the bleeder. Check to see if the fluid is full of air or if any fluid comes out. If it's full of air, top off the ABS reservoir and repeat the procedure until all the air is out of the system.

If little or no fluid comes out, apply pressure to the ABS reservoir using a handheld vacuum pump to push the air out and help the ABS pump pick up the fluid. Attach the vacuum hose to the port on the vacuum pump where pressure is released during operation. The port may be covered with a cap - just remove it and attach the hose.

4) Attach the quarter-size round disc (found in most vacuum pump kits) to the other end of the vacuum hose to cover the filler hole on the top of the ABS reservoir.

5) Start the engine. As the ABS pump runs, apply pressure against the ABS fluid in the reservoir to help the ABS pump pick up the brake fluid.

There are many ways to pressurize the ABS reservoir. DO NOT overpressure. A noticeable change in the sound of the ABS pump motor should occur when it starts to build pressure.

6) After the pump shuts off, try bleeding the system again. If brake fluid bleeds out, repeat the procedure until the air is totally out of the system. Always remember to keep the ABS reservoir full of brake fluid. If no fluid bleeds out, most likely the ABS pump has failed and won't produce pressure.

If this procedure works and the ABS pump can achieve pressure in the 45-second time frame, Code 1 will not reset.

Note:


The pressure switch is built inside the ABS unit and signals the ABS control unit to verify there is enough ABS pressure in the system. So a faulty ABS pressure switch or a wire problem for the pressure switch will cause a Code 1 with correct pressure in the ABS system.

If the ABS system is low on brake fluid or empty, and the bleeding procedure cleared Code 1, verify the cause of the brake fluid leak in the ABS system. It is common for the plugs on the side of the ABS modulator to seep brake fluid, which may not always be visible.

The brake fluid can also push back into the normal braking system past leaking seals in the ABS modulator solenoids, which may cause the brake master cylinder reservoir level to rise.

If there is a leak anywhere on or in the ABS modulator/ pump unit, or if the ABS pump has failed, the complete modulator unit should be replaced.

Low accumulator pressure will set a Code 1-8 in the system.

If the accumulator pressure is correct and all the air is bled out of the system, every time the ABS bleeder is opened, 35 to 45 cc of fluid will be bled out of the system.

High or low brake fluid volume can indicate a loss of accumulator pressure.
Remembering these basic steps will help you diagnosis the problem in less time.

Old 01-07-2005, 07:12 AM
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Default Re: ABS CODES (filthy_shovel)

Got this also


ABS pump motor relay: How to check-make sure ignition is switched off-remove the pump motor relay
-place ohmmeter probes between relay terminals C and D
-ohmmeter will read infinity (open circuit) if good
-whilst ohmmeter still connected, apply 12 volt supply to replay terminals A and B
-ohmmeter will read zero (continuity) if good
-if readings are different from above relay might be defective.

ABS pump motor: How to check
-IT IS IMPORTANT not to force the pump to run for more than 10 seconds
-check fuse for pump motor
-check ABS pump relay as previously described
-if these prove ok remove pump relay
-join pump relay female terminals 1 and 2 with a bridge wire
-pump motor should run and begin to labour quickly
-if motor is not running apply 12 volts directly to the 2 pin large orange connector plug
-if motor is not running, replacement pump is required

How to bleed ALB2 hydraulic system without Honda/Rover tools
-upon replacing pump top brake fluid resevoir up to maximum level
-with modulator bleed valve open and a pipe to safely channel fluid to a container
-bridge the pump motor relay female terminals 1 & 2, until clear bubble free air is seen
-ensure fluid is topped up continuously so as not to run pump dry
-individually bleed each wheel in sequence: RHR, LHF, LHR, RHF.
-top resevoir to back up to maximum
Old 01-07-2005, 07:21 AM
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Default Re: ABS CODES (filthy_shovel)

you are the man!!!!! I mean c'mon how more extensive of a report is this..HELL YEAH...i give you props my man
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