sh-awd problem!!!
#1
sh-awd problem!!!
Hi guys, its been a long while since I have posted. Went bmw, came back to trusted and beloved Acura. Its's an 05 RL, and its been in my family since 2008 and now its mine <3.
To skip small talk, I have an annoying issue with the car. The sh-awd light comes on randomly.. generally after I drive the car for about 15 minutes. After it turns on,and im in fwd only. It's winter, i live in Toronto, Canada, lol and i really need awd. My check engine light is also on, the code is for a faulty or most likely clogged EGR valve. I might have dreamt it, so please correct me if im wrong, but i remember reading somewhere that the two issues my car is having might be interrelated......or rather the faulty egr valve is somehow causing the sh-awd to turn off.
Please chime in with any feedback. I really want to get this fixed, i just want to be more informed on what's going on.
Thanks in advance!
To skip small talk, I have an annoying issue with the car. The sh-awd light comes on randomly.. generally after I drive the car for about 15 minutes. After it turns on,and im in fwd only. It's winter, i live in Toronto, Canada, lol and i really need awd. My check engine light is also on, the code is for a faulty or most likely clogged EGR valve. I might have dreamt it, so please correct me if im wrong, but i remember reading somewhere that the two issues my car is having might be interrelated......or rather the faulty egr valve is somehow causing the sh-awd to turn off.
Please chime in with any feedback. I really want to get this fixed, i just want to be more informed on what's going on.
Thanks in advance!
#3
Senior Moderator
I don't think CEL which indicates an emission issue will disable SH-AWD. Typically only drivetrain errors cause that.
How old is the battery? A weak battery, even one that passes an Autozone test, will cause all sorts of errors even including SH-AWD. The cold weather makes the battery less conductive, so that could be your issue.
How old is the battery? A weak battery, even one that passes an Autozone test, will cause all sorts of errors even including SH-AWD. The cold weather makes the battery less conductive, so that could be your issue.
The following 2 users liked this post by teh CL:
oo7spy (12-16-2016),
projektvertx (12-16-2016)
#5
Fk no!TheyldstroyEvrthing
^^his shawd light is coming on.
My vote doesn't count im an amateur, but I'll call battery as well. I got one 3 months ago with considerably higher capacities than the oem one, made for hard cold weather, and even when temperatures were not so cold and i honked for 2-3 seconds at a very smart driver, cmbs light came one for a few seconds then left. I'm guessing it means the current to that sensor reduced, then came back.
I'm wondering if the central computer isn't causing less current distribution unnecessarily.
My vote doesn't count im an amateur, but I'll call battery as well. I got one 3 months ago with considerably higher capacities than the oem one, made for hard cold weather, and even when temperatures were not so cold and i honked for 2-3 seconds at a very smart driver, cmbs light came one for a few seconds then left. I'm guessing it means the current to that sensor reduced, then came back.
I'm wondering if the central computer isn't causing less current distribution unnecessarily.
#6
Senior Moderator
#7
The best way is to pull the codes, if any, from the SH-awd system to know for certain. Until then it is just a guessing game.
Many inputs and outputs (sensors, actuators, etc) for the PCM are also just as critical for SH-awd control unit in order to function properly. One fault may or may not trigger multiple warning lights to illuminate on your cluster/mid/navi display. It is dependent on design/programming and varies from model to model. I have experienced an egr malfunction cause a awd failure.
Another example would be a faulty vehicle speed sensor which is monitored by the PCM, is also critical for the following- VSA/ABS, SH-awd, navi system operation. In this case one sensor can cause a powertrain, drivetrain and navi/location issue. Good luck.
Many inputs and outputs (sensors, actuators, etc) for the PCM are also just as critical for SH-awd control unit in order to function properly. One fault may or may not trigger multiple warning lights to illuminate on your cluster/mid/navi display. It is dependent on design/programming and varies from model to model. I have experienced an egr malfunction cause a awd failure.
Another example would be a faulty vehicle speed sensor which is monitored by the PCM, is also critical for the following- VSA/ABS, SH-awd, navi system operation. In this case one sensor can cause a powertrain, drivetrain and navi/location issue. Good luck.