2009 Acura MDX lock

Diagnosing why the engine won't
start falls into two areas, depending
on what you hear when you turn the
ignition switch to the START (III)
position:●You hear nothing, or almost
nothing. The engine's starter
motor does not operate at all, or
operates very slowly.●You can hear the starter motor
operating normally, or the starter
motor sounds like it is spinning
faster than normal, but the engine
does not start up and run.
Nothing Happens or the Starter
Motor Operates Very Slowly
When you turn the ignition switch to
the START (III) position, you do not
hear the normal noise of the engine
trying to start. You may hear a
clicking sound, a series of clicks, or
nothing at all. Check these things:
●Check the transmission interlock.
The transmission must be in Park
or neutral or the starter will not
operate.●Turn the ignition switch to the ON
(II) position. Turn on the
headlights, and check their
brightness. If the headlights are
very dim or do not come on at all,
the battery is discharged. See
Jump Starting
on page432.●Turn the ignition switch to the
START (III) position. If the
headlights do not dim, check the
condition of the fuses. If the fuses
are OK, there is probably
something wrong with the
electrical circuit for the ignition
switch or starter motor. You will
need a qualified technician to
determine the problem. See
Emergency Towing on page446.If the headlights dim noticeably or
go out when you try to start the
engine, either the battery is
discharged or the connections are
corroded. Check the condition of
the battery and terminal
connections (see page421).You
can then try jump starting the
vehicle from a booster battery (see
page432).
The Starter Operates Normally
In this case, the starter motor's speed
sounds normal, or even faster than
normal, when you turn the ignition
switch to the START (III) position,
but the engine does not run.
●Are you using a properly coded
key? An improperly coded key will
cause the immobilizer system
indicator in the instrument panel
to blink rapidly (see page70).
CONTINUED
If the Engine Won't Start
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2009 MDX

4. If the temperature gauge stays atthe red mark, turn off the engine.
5. Look for any obvious coolant leaks, such as a split radiator hose.
Everything is still extremely hot,
so use caution. If you find a leak, it
must be repaired before you
continue driving (see Emergency
Towing on page446).
6. If you do not find an obvious leak, check the coolant level in the
radiator reserve tank. Add coolant
if the level is below the MIN mark.
7. If there was no coolant in the reserve tank, you may need to add
coolant to the radiator. Let the
engine cool down until the pointer
reaches the middle of the
temperature gauge, or lower,
before checking the radiator.
Removing the radiator cap
while the engine is hot can
cause the coolant to spray out,
seriously scalding you.
Always let the engine and
radiator cool down before
removing the radiator cap.
8. Using gloves or a large heavy cloth, turn the radiator cap
counterclockwise, without pushing
down, to the first stop. After the
pressure releases, push down on
the cap, and turn it until it comes
off. 9. Start the engine and set the
climate control to AUTO at ‘‘Hi. ’’
Add coolant to the radiator up to
the base of the filler neck. If you
do not have the proper coolant
mixture available, you can add
plain water. Remember to have the
cooling system drained and refilled
with the proper mixture as soon as
you can.
10. Put the radiator cap back on tightly. Run the engine, and check
the temperature gauge. If it goes
back to the red mark, the engine
needs repair (see Emergency
Towing on page446).
11. If the temperature stays normal, check the coolant level in the
radiator reserve tank. If it has gone
down, add coolant to the MAX
mark. Put the cap back on tightly.
If the Engine Overheats
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2009 MDX

Checking and Replacing Fuses
If something electrical in your
vehicle stops working, the first thing
you should check for is a blown fuse.
Determine from the chart on pages
443,444,and445, or the diagram on
the fuse box lid, which fuse or fuses
control that device. Check those
fuses first, but check all the fuses
before deciding that a blown fuse is
the cause. Replace any blown fuses,
and check if the device works.
1. Turn the ignition switch to the LOCK (0) position. Make sure the
headlights and all other
accessories are off.
2. Remove the cover from the fuse box.
3. Check each of the large fuses inthe under-hood fuse boxes by
looking through the top at the wire
inside. Removing these fuses
requires a Phillips-head
screwdriver.FUSE BLOWN
BLOWN
Fuses44008/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

PRIMARY UNDER-HOOD FUSE BOX
No. Amps. Circuits Protected1 120 A Main fuse － Not Used
2 － 1 － Not Used
2 － 2 － Not Used
2 － 3 30 A Rear Blower Motor
2 － 4 40 A ABS VSA
2 － 5 40 A Trailer Main
2 － 6 40 A Power Seats, Driver's Position
Memory System, Subwoofer
2 － 7 40 A Front Heated Seat, TPMS,
Moonroof, Driver's Lumbar
Support
2 － 8 － Not Used
3 － 1 60 A Fog Lights, Front Blower
Motor
3 － 2 40 A Headlights, Daytime Running
Lights
3 － 3 60 A Cooling Fan, Condenser Fan,
MG Clutch, Headlight
Washer
ꭧ
3－ 4 50 A Ignition Switch Main
ꭧ : Canadian model No. Amps. Circuits Protected
3 － 5 50 A Power Window
3 － 6 60 A SH-AWD, Power Tailgate
Open/Closer, Rear ACC
Socket, Cargo Area Light,
Rear Defroster
3 － 7 30 A ECU (PCM)
3 － 8 － Not Used
4 40 A Audio, Door Lock, Interior Lights
5 － Not Used
6 － Not Used
7 30 A Active Damper Control Unit
8 30 A Audio Amplifier
9 7.5 A Rear Entertainment System
10 15 A Hazard
11 15 A Horn, Stop
12 20 A ABS VSA
13 20 A Trailer (Brake)
14 20 A Rear Heated Seat
15 20 A A/C Inverter
CONTINUED
Fuse Locations
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2009 MDX

INTERIOR FUSE BOXNo. Amps. Circuits Protected1 7.5 A TPMS
2 10 A Driver's Lumbar Support Motor
3 15 A Moonroof
4 20 A Front Heated Seats
5 10 A Audio No. Amps. Circuits Protected
6 7.5 A Interior Light
7 10 A Interior Light, Moonroof
8 20 A Door Lock
9 15 A ACC Socket
10 15 A IG Coil
11 30 A Windshield Wiper
12 10 A Subwoofer
13 20 A Passenger's Power Recline
14 20 A Driver's Power Slide
15 20 A Telescope Steering Wheel
16 20 A Driver's Power Recline
17 20 A Passenger's Power Slide
18 10 A Alternator
19 20 A Fuel Pump
20 7.5 A SH-AWD, Active Damper Control Unit
21 7.5 A Gauges No. Amps. Circuits Protected
22 10 A SRS
23 － Not Used
24 20 A Left Rear Power Window
25 20 A Right Rear Power Window
26 30 A Passenger's Power Window
27 30 A Driver's Power Window
28 20 A Tilt Steering Wheel
29 10 A ABS VSA
30 10 A A/C
31 15 A Headlight Auto Leveling,
Rear Wiper, Windshield/
Rear Washer
32 10 A ACC
33 － Not Used
AuxiliaryNo. Amps. Circuits Protected
1 7.5 A Starter DIAG
2 7.5 A STS
Auxiliary
Fuse Locations
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2009 MDX

The engine number is stamped into
the engine block. It is on the front.
The transmission number is on a
label on top of the transmission.
ENGINE NUMBERAUTOMATIC TRANSMISSION NUMBER
Identification Numbers
451
T echnical Inf ormat ion
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2009 MDX

A
Accessories andModifications
..........................
330
ACCESSORY (Ignition Key Position)
.................................
129
Accessory Power Sockets
..........
166
AC Power Outlet
........................
167
Active Damper System
...............
361
AcuraLink
®(U.S. models
only)
.......................................
307
Additives, Engine Oil
.................
394
Advanced Airbags
.................. ......
29
Airbag (SRS)
............................
9, 24
Air Conditioning System
............
170
Rear A/C Control
....................
175
Air Outlets (Vents)
.....................
177
Air Pressure, Tires
.....................
415
Alcohol in Gasoline
....................
322
Antifreeze
...................................
396
Anti-lock Brakes (ABS) Indicator Light
..................
66, 357
Operation
................................
357
Anti-theft, Audio System
.............
235 Anti-theft Steering Column
Lock
.......................................
129
Audio System
..............
180, 181,200
Auto Control Mode, Starting
Engine
....................................
339
Automatic Climate Control
.........
170
Automatic Lighting
....................
118
Automatic Seat Belt Tensioners
.................. .............
22
Automatic Speed Control
...........
270
Automatic Transmission
............
341
Capacity, Fluid
........................
452
Checking Fluid Level
..............
399
Shifting
...................................
341
Shift Lever Position Indicators
............................
341
Shift Lever Positions
...............
342
Shift Lock Release
...................
346
Auxiliary Input Jack
...................
232
B
Battery Charging System Indicator
........................
65, 436 Jump Starting
..........................
432
Maintenance
...........................
421
Specifications
..........................
453
Before Driving
...........................
321
Belts, Seat
................................
8, 20
Beverage Holders
......................
163
Booster Seats
...............................
55
Brakes Anti-lock Brakes (ABS)
...........
357
Break-in, New Linings
.............
322
Bulb Replacement
...................
406
Fluid
.......................................
401
Parking
...................................
153
System Indicator
...............
65, 438
Wear Indicators
.......................
357
Braking System
..........................
356
Break-in, New Vehicle
................
322
Brightness Control, Instruments
............................
123
CONTINUED
Index
I
INDEX
08/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX

Bulb ReplacementBack-up Lights
........................
407
Brake Lights
...........................
406
Front Parking Lights
...............
404
Front Side Marker Lights
........
404
Headlights
..............................
403
Rear Bulbs
..............................
406
Specifications
..........................
453
Taillights
.................................
406
Turn Signal Lights
..........
404, 406
Bulbs, Halogen
..........................
403
C
Cancel Button
............................
272
Capacities Chart
.........................
452
Carbon Monoxide Hazard
...... ......
58
Cargo
.........................................
332
Cargo Area Light
........................
161
Cargo Hook
................................
336
Cargo, How to Carry
..................
332
Carrying Cargo
..........................
332
CAUTION, Explanation of
...... .......
iii
CD Care
.....................................
229
Certification Label
......................
450 Chains, Tires
..............................
420
Changing a Flat Tire
..................
425
Changing Oil How to
....................................
394
When to
..................................
383
Charging System Indicator
...........................
65, 436
Checklist, Before Driving
...........
338
Childproof Door Locks
...............
131
Child Safety
..................................
37
Booster Seats
...........................
55
Child Seats
..........................
42, 45
Important Safety Reminders.....
41
Infants
......................................
42
Large Children
.........................
54
LATCH
.....................................
47
Risks with Airbags
...................
38
Small Children
.........................
43
Tethers
....................................
51
Where Should a Child Sit?
........
38
Child Seats
.............................
37, 45
LATCH Anchorage Points
........
47
Tether Anchorage Points
.........
51
Cleaning the Seat Belts
..............
409
Client Services
...........................
466
Climate Control System
.............
170 Clock
..........................................
236
Code, Audio System
...................
235
CO in the Exhaust
................
58, 460
Cold Weather, Starting in
...........
339
Compact Spare Tire
....................
424
Console Compartment
...............
164
Consumer Information (U.S. only)
.......................................
466
Controls, Instruments and
............
61
Coolant Adding
....................................
396
Checking
................................
326
Proper Solution
.......................
396
Temperature Gauge
.................
72
Crankcase Emissions Control System
...................................
460
Cruise Control Indicator
...............
70
Cruise Control Operation
...........
270
Cup Holders
...............................
163
Customize Settings
.. ....................
83
Door/Window Setup
...............
105
Lighting Setup
.........................
100
Meter Setup
.............................
89
Position Setup
..........................
97
Setting to Default
.....................
86
Wiper Setup
............................
113
IndexII08/06/06 16:58:07 09 ACURA MDX MMC North America Owner's M 50 31STX620 enu
2009 MDX