rasheed
Well-Known Member
As some of you know, I've been living with this problem for months. Occasionally it gets on my tits and I have another go at it but so far have had no success.
SRS warning in dash is on along with message display ÄIRBAG FAULT". Now what's interesting is that the red SRS indicator is usually steady but occasionally pulses bright and dim (not on and off). I wonder if this means something and whether I should count the pulses? I remember on very early OBD compliant cars you could count the flashes, refer to a chart and determine the fault code. It seems a bit daft they would have kept that what with the info display and Testbook etc etc. Maybe its just a quick and dirty way to tell you that both bulbs work and that's all?
What have I done: Unplugged and replugged the rotary coupler and passenger airbag (no sidebags). Visually inspected connection to external crash sensors. Tried every brand of diagnostics out there but none can communicate with the SRS ECU - link error is all they say. Changed the female OBD connecter in the car - found myself with an extra wire that despite Wammers' and Datatek's valiant efforts we could not identify with 100% certainty. Pin 13 or 14 is the SRS out, my car is export model apparently further fettled by SVU so don't really know which it should be; have tried swapping them and stuff but still no luck.
I'm down to suspecting:
1. SRS-ECU is dead
2. Break in data connection between ECU and OBD.
3. Problem is still with OBD connecter.
What do better minds suggest? Any way to test the ECU on its own? I don't have access to a donor vehicle I could swap one out of to try. If I do get it out and try to do a continuity test between Pin 14 in OBD and the ECU connecter, which pin should I look at there?
Really hoping someone with a fresh perspective will spot something obvious I've missed as I'm circling the drain here!
I forgot to mention how the problem started. The car was laid up for over a month and its apparently documented that if the battery drains completely sometimes an airbag fault is stored. Only wants a simple reset, problem is without the data-link...
SRS warning in dash is on along with message display ÄIRBAG FAULT". Now what's interesting is that the red SRS indicator is usually steady but occasionally pulses bright and dim (not on and off). I wonder if this means something and whether I should count the pulses? I remember on very early OBD compliant cars you could count the flashes, refer to a chart and determine the fault code. It seems a bit daft they would have kept that what with the info display and Testbook etc etc. Maybe its just a quick and dirty way to tell you that both bulbs work and that's all?
What have I done: Unplugged and replugged the rotary coupler and passenger airbag (no sidebags). Visually inspected connection to external crash sensors. Tried every brand of diagnostics out there but none can communicate with the SRS ECU - link error is all they say. Changed the female OBD connecter in the car - found myself with an extra wire that despite Wammers' and Datatek's valiant efforts we could not identify with 100% certainty. Pin 13 or 14 is the SRS out, my car is export model apparently further fettled by SVU so don't really know which it should be; have tried swapping them and stuff but still no luck.
I'm down to suspecting:
1. SRS-ECU is dead
2. Break in data connection between ECU and OBD.
3. Problem is still with OBD connecter.
What do better minds suggest? Any way to test the ECU on its own? I don't have access to a donor vehicle I could swap one out of to try. If I do get it out and try to do a continuity test between Pin 14 in OBD and the ECU connecter, which pin should I look at there?
Really hoping someone with a fresh perspective will spot something obvious I've missed as I'm circling the drain here!
I forgot to mention how the problem started. The car was laid up for over a month and its apparently documented that if the battery drains completely sometimes an airbag fault is stored. Only wants a simple reset, problem is without the data-link...