![]() If the warning light is still on after adjusting tire pressure, check for a damaged tire and repair as necessary. The warning light should turn off in a few minutes. After adjusting air pressure, drive the vehicle at 25 mph (40 km/h) or more to start TPMS re-checking of the tire inflation pressures. When the low tire pressure warning light illuminates, immediately check air pressure of all tires and adjust to the specified pressure. If battery fluid, gravity and voltage are out of specification (12 volts or more at specific gravity of 1.260 or more).Defective tire pressure monitoring control module.Tire pressure monitoring control module is faulty.Air pressure sensor is out of battery power.Under the following conditions, the system may not function properly: Be careful not to damage the airbag system wiring harness when servicing the TPMS control module. Do not use electrical test equipment on these circuits. All air bag system wiring harnesses are colored yellow. The TPMS will activate only when the vehicle is driven.ĬAUTION: The airbag system wiring harness is routed near the TPMS control module. The tire pressure monitor system (TPMS) on the 2005 – 2013 Subaru Legacy and Outback checks the tire pressures of all four road wheels when the vehicle is driven at speeds above 25 mph (40 km/h), and warns in the event of a loss of pressure by means of a low tire pressure warning light.Ī sensor installed in each wheel will indicate when tire pressure is severely low. SPECIAL TOOLS NEEDED? Yes, the Subaru Select Monitor and Transmitter Registration Tool (TPM-00012 or Kent-Moore Part No. I'm wondering if anyone else has noticed this behavior (or if not, anyone willing to go take a look?).SUBJECT VEHICLE: 2005 – 2013 Subaru Legacy and Outback. But, I'm assuming the TSC app is not lying. I haven't yet verified in the trailer that this is truly what is happening - that's the next step. But, if I'm engaging my hazard lights while going up a hill to let the (crazy) traffic behing me know I'm going slower than usual, that is a BAD thing. That may be just fine if I'm stopped at the side of the road (though it likely pulls more juice than needed). It was as if the hazard lights, rather than blinking the left and right turn signals (which is what I would have expected) were pulsing the brakes. BUT! I noticed from the app on my phone that the TSC was also engaging the brakes at the same time. One thing I noticed was that when I engaged the hazard lights, both taillights on the Ascent and on the travel trailer blinked on and off (yay). (Most) everything was working as expected. Before taking my trailer on my last trip, I tested all connections between the Ascent and the trailer. Because the TSC has a bluetooth connection, I can monitor when it is engaged. ![]() ![]() I use a Tuson (Electronic) Sway Controller (TSC) for controlling the brakes on my ~3,000 lb. I have a 2019 Ascent Limited with an OEM trailer hitch installed. Is this an expected design of the wiring harness? Is this happening in the control module tucked away under the cargo box cover or likely just the way the trailer wiring harness is wired? Is there any way to get a wiring diagram of the trailer wiring harness so I can tell? I'm wondering if anyone else has noticed this behavior (or if not, anyone willing to go take a look?).
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