Loose Fuel Filler Cap Message; Vehicle Loading; Certification Label - Jeep Wrangler2018 Owner's Manual

346 STARTING AND OPERATING

Loose Fuel Filler Cap Message

After fuel has been added, the vehicle diagnostic system can
determine if the fuel filler cap is possibly loose, improperly
installed, or damaged. If the system detects a malfunction,
the "gASCAP" message will display in the odometer display.
Tighten the gas cap until a clicking sound is heard. This is
an indication that the gas cap is properly tightened. Push the
odometer reset button to turn the message off. If the problem
persists, the message will appear the next time the vehicle is
started. This might indicate a damaged cap. If the problem is
detected twice in a row, the system will turn on the MIL.
Resolving the problem will turn the MIL off.

VEHICLE LOADING

Certification Label

As required by National Highway Traffic Safety Adminis-
tration regulations, your vehicle has a certification label
affixed to the driver's side door or pillar.
This label contains the month and year of manufacture,
Gross Vehicle Weight Rating (GVWR), Gross Axle Weight
Rating (GAWR) front and rear, and Vehicle Identification
Number (VIN). A Month-Day-Hour (MDH) number is
included on this label and indicates the Month, Day and
Hour of manufacture. The bar code that appears on the
bottom of the label is your VIN.
Gross Vehicle Weight Rating (GVWR)
The GVWR is the total permissible weight of your vehicle
including driver, passengers, vehicle, options and cargo.
The label also specifies maximum capacities of front and
rear axle systems (GAWR). Total load must be limited so
GVWR and front and rear GAWR are not exceeded.
Payload
The payload of a vehicle is defined as the allowable load
weight a truck can carry, including the weight of the driver,
all passengers, options and cargo.
Gross Axle Weight Rating (GAWR)
The GAWR is the maximum permissible load on the front
and rear axles. The load must be distributed in the cargo
area so that the GAWR of each axle is not exceeded.
Each axle GAWR is determined by the components in the
system with the lowest load carrying capacity (axle,
springs, tires or wheels). Heavier axles or suspension