R33 Attessa & Abs Fault Codes Needed

[Bozz]

I've scoured the net and can't find much useful stuff at all.

ABS and 4WD lights illuminate after starting the car. There's no antiskid functionality and no 4WD, as you assume since these lights are telling us.

I've got code 15 and 56 on the ABS/Attessa ECU in the boot. I've traced 15 to be a faulty servo on the ABS unit - putting a 5 ohm load across the suspect servo (that reads open circuit) gets rid of code 15.

I now suspect the G-sensor under the centre console to be the culprit - I've disconnected it and the ECU remains at code 56. I took the G sensor apart and didn't go further than removing the lid and top PCB till I realised its really not designed for any repair.

The R32 4WD system is electrically completely different to the R33, I've got the R32 complete service manual, the ECU is different, the G sensor is different, the ABS unit is different etc. Whether they're just a pin reshuffle or more, I dont know.

I've also got the JPNZ R33 manual but thats only for all R33 engines, not the rest of the car.

If anyone has any info to help, I'd really appreciate it before shelling out dollars for a G sensor.

Cheers

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[viking]

turn your ign to acc can you hear any relays ticking?

hav you checked 4wd pump?

[Bozz]

There are plenty of relays doing their job so yes you do hear relays clicking.

Is the 4wd pump code 56 on the ECU? Do you have a list of all the codes if you suggest the pump?

Thanks in advance.

[viking]

relays click once completing a circuit, more along the lines of continual tick from suspect relays indicating fault in circuit. i had this problem when abs awd light came on. ecu was giving numerous error codes like front left speed sensor then right speed sensor abs actuator circuit abs actuator motor. many hours spent finally located problem in 4wd pump.

only suggesting an idea. good luck

[Bozz]

ahh no worries.

Its certainly no repeatedly clicking relays, everything else seems sound.

ABS doesn't work even though the ABS light goes away after I fixed the O/C solenoid in the ABS servo unit and code 15 dissapeared.

I wonder if the G sensor is required by ABS as well.... Only the 4WD light is still illuminated on the dash.

I really really really really need the rest of the wiring diagrams for the car, it will make life so much easier. The ones in the links by Link (no pun intended, a fantastic resource ) only have the R33 engine diagram as I already have....