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Author Topic: 4wd and abs error lights on permanently  (Read 4309 times)

97 25xfour

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4wd and abs error lights on permanently
« on: October 26, 2014, 12:25:19 PM »
I have a 1997 25x four stagea that I have recently manual converted. Ever since the conversion I have had the 4wd and abs warning lights on constantly, when I start the car they disappear and then return after ~2 seconds. How do I check error codes for the abs/4wd ECU? (it doesn't have a light on the ECU in the boot).

westybob

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Re: 4wd and abs error lights on permanently
« Reply #1 on: October 26, 2014, 04:40:00 PM »
The attessa ecu is in the left hand side of the boot behind the lining so I don't know how you are supposed to see the light if there is one!
Elementary step - check the brake fluid level and also the attessa fluid level in the rh side of the boot as either can trigger the warning light.

97 25xfour

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Re: 4wd and abs error lights on permanently
« Reply #2 on: October 26, 2014, 08:52:01 PM »
both brake fluid and attesa fluid are between min and max, I'm guessing that there is a way to get the dash lights to flash the error codes.

30ed32

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Re: 4wd and abs error lights on permanently
« Reply #3 on: October 26, 2014, 09:27:49 PM »
probably an abs/wheel speed sensor
lol everything I say is just made up, don\'t pay any attention

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #4 on: October 26, 2014, 10:16:28 PM »
You should be able to count the flashes on the abs computer. If its like the r33 one you need something reflective if you can't be bothered unbolting the unit. I used my phone screen and then placed it under the little hole in the cover and pointed it towards me. This hole points straight down but I think its the only 1 in the cover so u should be able to feel where it is. If there is an issue u will see the flashes. They come in long and short flashes. Long is for 10's and shorts are 1n's so 1 long and 3 short would be 13.

I've put some codes below but there is a better set somewhere but can't find them right now.

ABS CODES

Code No. Malfunctioning Part Reference Page
12 Self-diagnosis could not detect any malfunctions.
45 Actuator front left outlet solenoid valve
46 Actuator front left inlet solenoid valve
41 Actuator front right outlet solenoid valve
42 Actuator front right inlet solenoid valve
51 Actuator rear right outlet solenoid valve
52 Actuator rear right inlet solenoid valve
55 Actuator rear left outlet solenoid valve
56 Actuator rear left inlet solenoid valve
25 *1 Front left sensor (open-circuit)
26 *1 Front left sensor (short-circuit)
21 *1 Front right sensor (open-circuit)
22 *1 Front right sensor (short-circuit)
31 *1 Rear right sensor (open-circuit)
32 *1 Rear right sensor (short-circuit)
35 *1 Rear left sensor (open-circuit)
36 *1 Rear left sensor (short-circuit)
18 *1 Sensor rotor
61 *3 Actuator motor or motor relay
63 Solenoid valve relay
57 *2 Power supply (Low voltage)
71 Control unit

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #5 on: October 26, 2014, 10:23:45 PM »
I didn't think there was a light on mine either until I found the drilled hole in the casing. The light is actually on the circuit board below the hole. Have you checked the fuse for the system? When mine failed it turned out to be a plug in the left foot well behind the ecu. So much to track down when this happens. Took me 2 weeks to find the issue. My ecu was telling me front right sensor but as I said before it turned out to be a plug which was damaged after a break in. 

97 25xfour

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Re: 4wd and abs error lights on permanently
« Reply #6 on: October 28, 2014, 05:14:04 PM »
I still can't find a light and I have previously pulled the ECU out of the boot and couldn't find one, where is the drilled hole located?
Thanks

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #7 on: October 28, 2014, 08:09:48 PM »
I will check mine and get back to you

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #8 on: October 28, 2014, 09:48:50 PM »
Ive got a few pictures for you. i realize mines in a gtr but they are similar years so figure the parts they use might be similar.

Looking in from the boot


this is looking straight up underneath the abs ECU


You will notice the single hole on the surface of the ecu. the LED is under this hole

97 25xfour

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Re: 4wd and abs error lights on permanently
« Reply #9 on: October 28, 2014, 10:53:54 PM »
mine is definitely mounted differently but I will pull it out again tomorrow to have another look at it

97 25xfour

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Re: 4wd and abs error lights on permanently
« Reply #10 on: October 31, 2014, 01:37:02 PM »
found the light, it is just flashing every ~3 seconds

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #11 on: October 31, 2014, 03:59:38 PM »
Just the 1 flash? If so1 that's the same error as mine. Front right wheel sensor although mine turned out to be a loose plug behind the ecu. Check the wires along the right inner front guard for breaks esp if the cars lowered. Could also be the plug into it which is in the engine bay. Did it do it after any new mods or anything happen around the time of the failure?

97 25xfour

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Re: 4wd and abs error lights on permanently
« Reply #12 on: October 31, 2014, 04:38:46 PM »
Champion! Was as simple as a wheel sensor being slightly unplugged.  Rather disappointed in myself yet very stoked at the same time

Osiris09

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Re: 4wd and abs error lights on permanently
« Reply #13 on: October 31, 2014, 06:22:23 PM »
I'm glad I could help. I know I was tearing my hair out when it happened on mine. If you have a look at my build thread you will see the lengths I went to when I was trying to find the issue.Only after that did I find the full wiring diagram for the car and exactly where all wire in the car run.