Jeep Liberty: Onboard Diagnostic System — OBD II
Your vehicle is equipped with a sophisticated onboard diagnostic system called OBD II. This system monitors the performance of the emissions, engine, and automatic transmission control systems. When these systems are operating properly, your vehicle will provide excellent performance and fuel economy, as well as engine emissions well within current government regulations.
If any of these systems require service, the OBD II system will turn on the “Malfunction Indicator Light (MIL).” It will also store diagnostic codes and other information to assist your service technician in making repairs. Although your vehicle will usually be drivable and not need towing, see your authorized dealer for service as soon as possible.
CAUTION!
• Prolonged driving with the MIL on could cause
further damage to the emission control system. It
could also affect fuel economy and drivability. The
vehicle must be serviced before any emissions
tests can be performed.
• If the MIL is flashing while the engine is running, severe catalytic converter damage and power loss will soon occur. Immediate service is required.
Engine Compartment — 3.7L
1 — Air Cleaner Filter
2 — Engine Oil Dipstick
3 — Brake Fluid Reservoir
4 — Integrated Power Module (Fuses)
5 — Battery
6 — Washer Fluid Reservoir
7 — Engine Coolant Reser ...
Loose Fuel Filler Cap Message
If the vehicle diagnostic system determines that the fuel
filler cap is loose, improperly installed, or damaged, a
“gASCAP” message will display in the odometer or a
“CHECK gASCAP” messa ...
See also:
Radio Theft Protection
Your vehicle’s audio system will
disable itself if it is disconnected
from electrical power for any reason.
To make it work again, you must
enter a specific code using the preset
buttons (i ...
Battery
- Keep the battery surface clean and dry.
Clean the battery with a solution of baking
soda and water.
- Make certain the terminal connections are
clean and securely tightened.
- If the vehicle ...
Fan speed control dial
The fan operates only when the ignition
switch is turned to the “ON” position. The
fan speed control dial is used to select
four fan speeds. ...