GASOLINE TANK CAP LOOSE OR MISSING
#1
#2
RE: GASOLINE TANK CAP LOOSE OR MISSING
If it works like most modern vehicles, the LR3 will do a vaccuum check to see if there are leaks in the fuel tank. If the gas cap is missing or loose, the vaccuum test will not pass, causing the error message, perhaps inhibitng the LR3 from starting all together. But I'm just talking general terms using other vehicles I know from experience. Not sure to what extent the LR3 works the same.
#3
#4
#5
both turned off and I filled the tank...
Yep, both the notice on the info display and the engine light turned off at the same time. I ran the tank down to a few gallons and then refilled completely (made sure the cap was on and cleaned it off-seemed pretty clean to me before though). Local LR service advisor said something about the system checking four or five times over the next restarts and then either kicking out the warning or continuing it...He did say if after a few days if it hadn't turned off to bring it in for a vacuum vapor test (about an hour diagnostic)...
sworks
sworks
#6
#7
RE: both turned off and I filled the tank...
There is a DMTL pump that is a part of the evaporative emissions system. After the vehicle has been driving for about ten miles,
the pcm will begin an evaporative system leak check after the engine is shut off and sits for ten or more minutes. It runs the pump which draws in air from the atmosphere and performs a reference leak check by running the pump through a fixed orifice and records the current used(usually about 26mA). ThenthePCMactivates the changeover valve and pressurizes the fuel tank/system and compares the current used to pressurize the system against the reference current. If the leak check current is the same as or higher than the reference current, then the system is deemed to be tight, and if the leak check current is lower than the reference current then the system is deemed to have a leak. This issue will not lead to the vehicle not starting.
the pcm will begin an evaporative system leak check after the engine is shut off and sits for ten or more minutes. It runs the pump which draws in air from the atmosphere and performs a reference leak check by running the pump through a fixed orifice and records the current used(usually about 26mA). ThenthePCMactivates the changeover valve and pressurizes the fuel tank/system and compares the current used to pressurize the system against the reference current. If the leak check current is the same as or higher than the reference current, then the system is deemed to be tight, and if the leak check current is lower than the reference current then the system is deemed to have a leak. This issue will not lead to the vehicle not starting.
#8
#9
#10
Thread
Thread Starter
Forum
Replies
Last Post