Have recently had the SRS light come on for my UK Mitsubishi Outlander first reg in April 2005. A scan tool of the SRS system just reports the one fault code "27 D-PT SQ TRBL2". Am I right in thinking this is short for driver side pre-tensioner squib and trouble code 2 meaning closed? I've tried much general searching on the web but can't find an answer explaining the code.

A workshop has carried out a number of electrical tests but can't find the exact problem, suggesting it was probably the wiring between the SRS ACU and the seat belt pre-tensioner.

Wondered if any other Outlander owner had encountered this particular SRS fault code problem and if so what was the solution?

 

Hi,
I would take a close look at any wiring that runs underneath the seat. It could easily get snagged and wires strained. Had an issue on a seat side airbag in a SAAB. System reported a fault with the airbag even after the airbag was replaced. Discovered a fault in an electrical connector under the seat. From memory, a resistor was incorporated into the connector. Without it, the overall resistance of the airbag circuit was detected as a fault (voltage out of range?) - neither a short nor an open circuit.
Even a stretched wire may be enough to increase the resistance enough to push the voltage drop out of limit. Good luck.

 

Many thanks for your reply and I will bear in mind what you say about possible wiring snagging or stretching.

I have had a workshop check out the SRS light on problem and they carried out various tests on wiring under the seat and connections to the acu on the transmission tunnel under the gear selector, plus the driver seatbelt pre-tensioner which involved removal of the seat and b pillar plastic covering etc. but he has drawn a blank on what is causing the problem. He thought the driver pre-tensioner squib reading matched that on the passenger side and both were in the acceptable ohm range. Not sure if he did check the seat airbag wiring.

I did subsequently carry out some simple connection checks myself and used electrical contact cleaner on the seat but all to no avail. The workshop owner guy suggested taking the car to another auto electrical workshop he recommends and it's looking like that's the route I will now need to take. I just find it so frustrating / annoying that the fault code I described seems impossible to decipher and pinpoint to exactly where the problem lies and the solution Especially as the car has been owned in the family since brand new and thus its full history is so well known.

Will update in due course if I get the problem fixed - or if I have to give up

 

Fault now fixed. Car was taken to an auto electrician for a 2nd opinion and their testing identified that it was the driver's side squib that was faulty. I sent off the seatbelt unit to a company who replaced the squib. Seatbelt refitted and the SRS fault light has now gone out. All sorted thankfully.