2012 Acura MDX fuel cap

Onboard Refueling Vapor
Recovery
The onboard refueling vapor
recovery (ORVR) system captures
the fuel vapors during refueling. The
vapors are adsorbed in a canister
filled with activated carbon. While
driving, the fuel vapors are drawn
into the engine and burned off.
Exhaust Emissions Controls
The exhaust emissions controls
include four systems: PGM-FI,
ignition timing control, exhaust gas
recirculation, and three way catalytic
converter. These four systems work
together to control the engine's
combustion and minimize the
amount of HC, CO, and NOx that
come out the tailpipe. The exhaust
emissions control systems are
separate from the crankcase and
evaporative emissions control
systems.
PGM-FI SystemThe PGM-FI system uses sequential
multiport fuel injection. It has three
subsystems: air intake, engine
control, and fuel control. The
powertrain control module (PCM)
uses various sensors to determine
how much air is going into the
engine. It then controls how much
fuel to inject under all operating
conditions.Ignition Timing Control SystemThis system constantly adjusts the
ignition timing, reducing the amount
of HC, CO, and NOx produced.Exhaust Gas Recirculation (EGR)
SystemThe exhaust gas recirculation (EGR)
system takes some of the exhaust
gas and routes it back into the intake
manifold. Adding exhaust gas to the
air/fuel mixture reduces the amount
of NOx produced when the fuel is
burned.
Three Way Catalytic ConverterThe three way catalytic converter is
in the exhaust system. Through
chemical reactions, it converts HC,
CO, and NOx in the engine's exhaust
to carbon dioxide (CO
2), nitrogen
(N
2), and water vapor.
Replacement Parts
The emissions control systems are
designed and certified to work
together in reducing emissions to
levels that comply with the Clean Air
Act. To make sure the emissions
remain low, you should use only new
Acura replacement parts or their
equivalent for repairs. Using lower
quality parts may increase the
emissions from your vehicle.
The emissions control systems are
covered by warranties separate from
the rest of your vehicle. Read your
warranty manual for more
information.
Emissions Controls588

Emergency Flashers
..................
132
Emergency Towing
....................
572
Emissions Controls
....................
587
Emissions Testing
......................
590
Engine
Adding Engine Coolant
...........
520
Check Starting System
............
443
Coolant Temperature Gauge
....
78
If it Won't Start
........................
557
Malfunction Indicator
Lamp
.............................
69, 563
Oil Life Indicator
.....................
507
Oil Pressure Indicator
.......
69, 562
Oil, What Kind to Use
.............
517
Overheating
............................
560
Specifications
..........................
579
Speed Limiter
..........................
446
Starting
...................................
442
Engine Coolant
..........................
520
Ethanol in Gasoline
....................
422
Evaporative Emissions
Controls
..................................
587
Exhaust Fumes
............................
61
Exhaust Gas Recirculation
System
...................................
588Expectant Mothers, Use of Seat
Belts by
....................................
19
F
Fan, Interior
...............................
185
Features
.....................................
181
Filters
Dust and Pollen
.......................
534
Oil
...........................................
518
Flashers, Hazard Warning
.........
132
Flat Tire, Changing a
.................
551
Floor Mats
.................................
535
Fluids
Automatic Transmission
.........
523
Brake
......................................
525
Location
..................................
515
Power Steering
........................
526
Windshield Washer
.................
522
FM Stereo Radio
Reception
................................
303
Fog Lights
..................................
130
Folding the Second Seat
.............
153
Folding the Third Seat
...............
154
Four-way Flashers
......................
132Front Airbags
.........................
10, 30
Front Seat
..................................
149
Adjusting
.................................
149
Air Ventilation
.........................
158
Heaters
...................................
157
Fuel
............................................
422
Economy
.................................
428
Fill Door and Cap
....................
424
Gauge
......................................
78
Low Fuel Indicator
...................
77
Octane Requirement
...............
422
Opening the Fuel Fill Door
Manually
.............................
572
Reserve Indicator
.....................
77
Tank, Filling the
......................
424
Tighten Fuel Cap
....................
425
Fuel Economy
............................
428
Fuses, Checking the
..................
566
G
Gas Mileage, Improving
.............
429
Gasoline
.....................................
422
Gauge
......................................
78
Low Fuel Indicator
...................
77
IndexIV

Gasoline:
Premium unleaded gasoline,
pump octane number of 91 or
higher.
Fuel Tank Capacity:
21.00 US gal (79.5 L)
Recommended Engine Oil:
API Premium grade 5W-20
detergent oil (see page 517).
Oil change capacity (including
filter):
4.5 US qt (4.3 L)
Automatic Transmission Fluid:
Acura ATF DW-1 (automatic
transmission fluid) (see page 524).Rear Differential Fluid:
Use Acura All-Wheel Drive Fluid
(DPSF) only.
Capacity:
SH-AWD differential case
2.6 US qt (2.5 L)
Transfer Assembly Fluid:
SAE 90 or SAE 80W-90 viscosity
hypoid gear oil, API service
classified GL4 or GL5 only.
Power Steering Fluid:
Acura Power Steering Fluid
preferred, or another brand of
power steering fluid as a
temporary replacement. Do not
use ATF (see page 526).Brake Fluid:
Honda Heavy Duty Brake Fluid
DOT 3 preferred, or a DOT 3 or
DOT 4 brake fluid as a temporary
replacement (see page 525).
Tire Pressure (measured cold):
Front/Rear:
32 psi (220 kPa, 2.2 kgf/cm
2)
Compact Spare Tire:
60 psi (420 kPa, 4.2 kgf/cm2)
Service Information Summary