TL V6-3.2L (2004)
Fuel Filler Cap Warning Indicator: Technical Service Bulletins
Fuel System - 'Check Fuel Cap' Message Information
CHECK FUEL CAP, TIGHTEN
FUEL CAP Messages
NOTE:
This article applies to 05-06 RLs, '05-06 RSXs, 04-06 TLs, and 05-06 TSXs.
If a vehicle's fuel fill cap is loose or missing, and the ECM/PCM detects an EVAP system leak when it runs the EVAP monitor, the CHECK FUEL CAP
message appears on the information display when the engine is started. (On '06 RLs, TLs, TSXs, and future Acura models, it's the TIGHTEN FUEL
CAP message.) A temporary DTC is also stored in the ECM/PCM's memory. If this happens, there's really no need for the owner to bring the vehicle in
for service. All he or she has to do is shut off the engine and make sure the fuel fill cap is in place and properly tightened (it's one or three clicks,
depending on what's written on the cap).
Although the owner can cycle the message from the display with the reset button (the actual button name varies by model), the temporary DTC that's
setting the message is still there. This means the message never really goes away. It can be cycled back with the reset button, and it comes on again if the
ignition switch is cycled or the engine is restarted. This message keeps coming back until the EVAP monitor runs again and it detects no EVAP system
leak. This could take several days, even weeks, depending on how often the vehicle is driven.
If, when the next EVAP monitor runs, the cap wasen't tightened or there's another EVAP system leak detected, the MIL comes on and the message goes
off. A permanent DTC is now stored in the ECM/PCM's memory. If the owner now tightens the cap, the MIL should go off after the next EVAP monitor
run, yet, this could still take days or weeks. If the MIL is still on after that monitor run, then it's time to bring the vehicle in for service. If the vehicle
comes into your shop with the fuel cap message or the MIL on, make sure the fuel fill cap is in place and properly tightened. Record the DTC, then clear
it with the HDS, and run the EVAP system function. test. If there's still a problem, press on with normal troubleshooting
