[GTiJohn]

As mentioned on a previous thread, I now have a 216 cabby fitted with the Honda ALB2 Antilock Braking System, only it doesn't work.

When I collected the car the system was dead, not even the warning lamp illuminated and now I've done a little digging I know the reason for this. The ECU in the boot, under the hoodwell, has been disconnected.

Before I plug it back in and attempt to read off the fault codes - http://www.bba-reman.com/content.aspx?c ... ault_codes - I know you have to put the system into diagnostic mode by bridging 2 wires in the small connector dangling under the driver's seat. But there are 4 of them to choose from.....

Does anybody know which 2 coloured wires need to be bridged ?

[GTiJohn]

Right , we're geting somewhere now

Having consulted - http://www.aa1car.com/library/abs_honda.htm - further, I realised that the ALB diagnostic connector is actually under the drivers side dash, just by the bonnet release. It is clipped in a natty, bright green holder - you can't miss it. No idea what the connector under the seat is...

After pluging the connectors back into the ECU and getting the ABS 'self-check' warning light on, and off after a few seconds, driving a few yards down the road brought the it came back on again. Using an handy paperclip to bridge the 2 wires I was surprised and relieved to see just one 2-'digit' flash fault code appear.

4-4 - RHR wheel speed sensor.

Next job - get underneath and see it anything is obviously wrong with the sensor ring or the sensor head.

Just a bit of hopeful punt - has anybody got a spare sensor, by any chance ?

They're £51 on ebay with a "make offer" option.....

[E_T_V]

Before getting under the car measure the resistance of the sensors using a multimeter at the ECU end (ECU unplugged). If the resistance is infinite on the sensor then either it is faulty or there is a wire break somewhere on the way to it (usually near the wheel end) If you check the resistance of the sensor under the car you can eliminate the wiring as the potential cause bwefore splashing out on the sensor.

However thinking more on this if it all self checked ok and only came on once driving then this is more indicative of a dirty sensor or cracked reluctor ring. As the rear rings don't really give issues it may just need a clean with any luck to remove any rust/metal from it (they are magnetic)

[GTiJohn]

Got underneath and disconnected the RHR sensor from the main wiring harness just behind the fuel tank. The ohmeter then read 'infinite' so off the sensor came.

Well nearly all of it came off.....

The sensor cover fixings were both already well rounded-off indicating I wasn't the first to be trying to get at the sensorhead, so out came the hacksaw to gain accesss to the sensorhead fixings. Perhaps unsurprisingly these 2 small AF fixings also didn't want to budge so they're now also more round than hex.

Any good ideas of where to go next ? I can only think of getting the disc off to get better access

[E_T_V]

Remove the caliper and remove the lot so you can get to it better on the bench?

[GTiJohn]

ebay sensor arrived today - for less than £51 - but unfortunately it's NBG, as the pink connector has been cut off the end of the cable.

A refund has been requested.....

Assuming I can find/make a replacement sensor assy, I'm thinking of building up a spindle assy off the car and then removing the old one and swapping over the hub, caliper etc. Has anybody done this before ? Any advice ?

[GTiJohn]

After a bit of faffing the new wheel speed sensor has been fitted but the ABS warning light still went on after 15mph.

The fault flash code has changed though - it's now a simple '1' or "hydraulic pump over run".

Which sounds more serious

I was rather expecting this as the pump probably hasn't run for a few years.

Has anybody had this code before and were able to resolve the problem ?

[GTiJohn]

I've been following the instructions on http://www.bba-reman.com/hondaalb2pump.htm and now I know that the ABS relay is OK and that the pump motor runs when I give it 12v but it doesn't "begin to labour quickly" which to me means it isn't building up significant hydraulic pressure.

I'll give it a road test tomorrow (when it stops raining) and we'll see if anything has changed.

I'm not hopeful.......

Don't suppose anybody has a spare pump/accumulator assembly that I could try and get refurbished ?

[GTiJohn]

I wasn't surprised or delighted.....

[E_T_V]

Worth an ask at austin garages as I think Mat had his honda ABS faults cured by them. I remember it wasn't cheap though.