Acura MDX (2018 year). Manual - part 41

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Engine Does Not Start

Checking the Engine

If the engine does not start, check the starter.

Starter condition

Checklist

Starter doesn’t turn or turns 
over slowly.
The battery may be dead. Check 
each of the items on the right and 
respond accordingly.

Check for a message on the MID.

●

If the To Start, Hold Remote Near Start Button message appears

2 If the Keyless Access Remote Battery is Weak P. 647

u

Make sure the keyless access remote is in its operating range.

2 ENGINE START/STOP Button Operating Range P. 169

Check the brightness of the interior lights.
Turn on the interior lights and check the brightness.

●

If the interior lights are dim or do not come on at all

2 Battery P. 611

●

If the interior lights come on normally 

2 Fuses P. 658

The starter turns over normally 
but the engine doesn’t start.
There may be a problem with the 
fuse. Check each of the items on 
the right and respond accordingly.

Review the engine start procedure.
Follow its instructions, and try to start the engine again. 

2 Starting the Engine P. 465

Check the immobilizer system indicator.
When the immobilizer system indicator is blinking, the engine cannot be started.

2 Immobilizer System P. 163

Check the fuel level.
There should be enough fuel in the tank. 

2 Fuel Gauge P. 119

Check the fuse.
Check all fuses, or have the vehicle checked by a dealer.

2 Inspecting and Changing Fuses P. 665

If the problem continues:

2 Emergency Towing P. 666

1

Checking the Engine

If you must start the vehicle immediately, use an 
assisting vehicle or booster battery to jump start it.

2 Jump Starting P. 649

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If the Keyless Access Remote Battery is Weak

If the beeper sounds, the To Start, Hold Remote Near Start Button message 
appears on the multi-information display, and the indicator on the ENGINE START/
STOP button flashes, and the engine won’t start, start the engine as follows:

1. Touch the center of the ENGINE START/

STOP button with the A logo on the keyless 
access remote while the indicator on the 
ENGINE START/STOP button is flashing. 
The buttons on the keyless access remote 
should be facing you.

u

The indicator flashes for about 30 
seconds.

2. Depress the brake pedal and press the 

ENGINE START/STOP button within 10 
seconds after the beeper sounds while the 
indicator stays on.

u

If you don’t depress the pedal, the mode 
will change to ACCESSORY.

ENGINE

START

STOP

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Emergency Engine Stop

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Emergency Engine Stop

The ENGINE START/STOP button may be used to stop the engine due to an 
emergency situation even while driving. If you must stop the engine, do either of the 
following operations:
• Press and hold the ENGINE START/STOP button for about two seconds.
• Firmly press the ENGINE START/STOP button three times.

The steering wheel will not lock. However, because turning off the engine disables 
the power assist the engine provides to the steering and braking systems, it will 
require significantly more physical effort and time to steer and slow the vehicle. Use 
both feet on the brake pedal to slow down the vehicle and stop immediately in a 
safe place.

The gear position automatically changes to 

(

P after the vehicle comes to a complete 

stop. Then, the power mode changes to VEHICLE OFF.

The gear position automatically changes to P after the vehicle comes to a complete 
stop. Then press the ENGINE START/STOP button twice without depressing the 
brake pedal to change the mode to VEHICLE OFF.

1

Emergency Engine Stop

Do not press the button while driving unless it is 
absolutely necessary for the engine to be turned off.

U.S. models

Canadian models

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Jump Starting

Turn off the power to electric devices, such as audio and lights. Turn off the engine, 
then open the hood.

1. Pull up on the engine cover, remove it from 

the pins.

u

Start on the passenger side and lift the 
outermost edge of the cover.

u

Move towards the driver side while 
applying uniform upward pressure.

2. Connect the first jumper cable to your 

vehicle’s battery + terminal.

3. Connect the other end of the first jumper 

cable to the booster battery + terminal.

u

Use a 12-volt booster battery only.

u

When using an automotive battery 
charger to boost your 12-volt battery, 
select a lower charging voltage than 15 
volt. Check the charger manual for the 
proper setting.

4. Connect the second jumper cable to the 

booster battery - terminal.

■

Jump Starting Procedure

1

Jump Starting

Securely attach the jumper cables clips so that they 
do not come off when the engine vibrates. Also be 
careful not to tangle the jumper cables or allow the 
cable ends to touch each other while attaching or 
detaching the jumper cables.

Battery performance degrades in cold conditions and 
may prevent the engine from starting.

3

WARNING

A battery can explode if you do not follow 
the correct procedure, seriously injuring 
anyone nearby.

Keep all sparks, open flames, and smoking 
materials away from the battery.

Engine Cover

Pin

Booster Battery

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Jump Starting

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5. Connect the other end of the second 

jumper cable to the engine hanger as 
shown. Do not connect this jumper cable to 
any other part.

6. If your vehicle is connected to another 

vehicle, start the assisting vehicle’s engine 
and increase its rpm slightly.

7. Attempt to start your vehicle’s engine. If it 

turns over slowly, check that the jumper 
cables have good metal-to-metal contact.

Once your vehicle’s engine has started, remove the jumper cables in the following 
order.

1. Disconnect the jumper cable from your vehicle’s ground.
2. Disconnect the other end of the jumper cable from the booster battery - 

terminal.

3. Disconnect the jumper cable from your vehicle’s battery + terminal.
4. Disconnect the other end of the jumper cable from the booster battery + 

terminal.

Have your vehicle inspected by a nearby service station or a dealer.

■

What to Do After the Engine Starts

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Overheating

How to Handle Overheating

Overheating symptoms are as follows:
• The temperature gauge needle is at the 

 mark or the engine suddenly loses 

power.

• The Stop Driving When Safe. Engine Temperature Too Hot message appears 

on the multi-information display (MID).

• Steam or spray comes out of the engine compartment.

■

First thing to do

1. Immediately park the vehicle in a safe place.
2. Turn off all accessories and turn on the hazard warning lights.

u

No steam or spray present: Keep the engine running and open the hood.

u

Steam or spray is present: Turn off the engine and wait until it subsides. 
Then, open the hood.

1

How to Handle Overheating

NOTICE

Continuing to drive with the temperature gauge 
needle at the 

 mark may damage the engine.

3

WARNING

Steam and spray from an overheated 
engine can seriously scald you.

Do not open the hood if steam is coming 
out.

H

H

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Overheating

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How to Handle Overheating

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■

Next thing to do

1. Check that the cooling fan is operating and 

stop the engine once the temperature 
gauge needle comes down.

u

If the cooling fan is not operating, 
immediately stop the engine.

2. Once the engine has cooled down, inspect 

the coolant level and check the cooling 
system components for leaks.

u

If the coolant level in the reserve tank is 
low, add coolant until it reaches the 
MAX mark.

u

If there is no coolant in the reserve tank, 
check that the radiator is cool. Cover the 
radiator cap with a heavy cloth and open 
the cap. If necessary, add coolant up to 
the base of the filler neck, and put the 
cap back on.

■

Last thing to do

Once the engine has cooled sufficiently, restart it and check the temperature gauge. 
If the temperature gauge needle has gone down, resume driving. If it has not gone 
down, contact a dealer for repairs.

1

How to Handle Overheating

If the coolant is leaking, contact a dealer for repairs.

Use water as an emergency/temporary measure only. 
Have a dealer flush the system with proper antifreeze 
as soon as possible.

Continuing to drive with the Stop Driving When 
Safe. Engine Temperature Too Hot message on 
the multi-information display may damage the 
engine.

3

WARNING

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.

Reserve Tank

MAX

MIN

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Indicator, Coming On/Blinking

If the Low Oil Pressure Indicator Comes On

■

Reasons for the indicator to come on

Comes on when the engine oil pressure is low.

■

What to do as soon as the indicator comes on

1. Immediately park the vehicle on level ground in a safe place.
2. If necessary, turn the hazard warning lights on.

■

What to do after parking the vehicle

1. Stop the engine and let it sit for approximately three minutes.
2. Open the hood and check the oil level.

2 Oil Check P. 585

3. Start the engine and check the low oil pressure indicator.

u

The indicator goes off: Start driving again.

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The indicator does not go off within 10 seconds: Immediately stop 
the engine and contact a dealer for repairs.

If the Charging System Indicator Comes On

■

Reasons for the indicator to come on

Comes on when the battery is not being charged.

■

What to do when the indicator comes on

Turn off the climate control system, rear defogger, and other electrical 
systems, and immediately contact a dealer for repairs.

1

If the Low Oil Pressure Indicator Comes On

NOTICE

Running the engine with low oil pressure can cause 
serious mechanical damage almost immediately.

1

If the Charging System Indicator Comes On

If you need to stop temporarily, do not turn off the 
engine. Restarting the engine may rapidly discharge 
the battery.

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If the Malfunction Indicator Lamp Comes On or 
Blinks

■

Reasons for the indicator lamp to come on or blink

• Comes on when there is a problem with the engine emissions control 

system.

• Blinks when engine misfiring is detected.

■

What to do when the indicator lamp comes on

Avoid high speeds and immediately get your vehicle inspected at a 
dealer.

■

What to do when the indicator lamp blinks

Park the vehicle in a safe place with no flammable items and wait at least 
10 minutes or more with the engine stopped until it cools.

1

If the Malfunction Indicator Lamp Comes On or Blinks

NOTICE

If you drive with the malfunction indicator lamp on, 
the emissions control system and the engine could be 
damaged.

If the malfunction indicator lamp blinks again when 
restarting the engine, drive to the nearest dealer at 
31 mph (50 km/h) or less. Have your vehicle 
inspected.

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If the Brake System Indicator (Red) Comes On

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If the Brake System Indicator (Red) Comes On

■

Reasons for the indicator to come on

• The brake fluid is low.
• There is a malfunction in the brake system.

■

What to do when the indicator comes on while driving

Depress the brake pedal lightly to check pedal pressure.
• If normal, check the brake fluid level the next time you stop.
• If abnormal, take immediate action. If necessary, downshift the 

transmission to slow the vehicle using engine braking.

If the Speed-Sensitive Electric Power Steering (EPS) 
System Indicator Comes On

■

Reasons for the indicator to come on

• Comes on when there is a problem with the EPS system.
• If you depress the accelerator pedal repeatedly to increase the engine 

speed while the engine is idling, the indicator comes on, and 
sometimes the steering wheel becomes harder to operate.

■

What to do when the indicator comes on

Stop the vehicle in a safe place and restart the engine.
If the indicator comes on and stays on, immediately have your vehicle 
inspected by a dealer.

1

If the Brake System Indicator (Red) Comes On

Have your vehicle repaired immediately.
It is dangerous to drive with low brake fluid. If there 
is no resistance from the brake pedal, stop 
immediately in a safe place. If necessary downshift 
the gears.

If the brake system indicator and ABS indicator come 
on simultaneously, the electronic brake distribution 
system is not working. This can result in vehicle 
instability under sudden braking.
Have your vehicle inspected by a dealer immediately.

U.S.

Canada

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If the Electric Parking Brake System Indicator Comes On

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If the Electric Parking Brake System Indicator Comes 
On

■

Reasons for the indicator to come on

Comes on when there is a problem with the electric parking brake 
system.

■

What to do when the indicator comes on

Avoid using the parking brake and immediately get your vehicle 
inspected at a dealer.

■

What to do when the electric parking brake indicator comes on 
or blinks at the same time

Release the parking brake.

2 Parking Brake P. 528

• If the electric parking brake indicator remains on or blinks even after 

releasing the parking brake, immediately stop the vehicle in a safe 
place and call a dealer.

u

To prevent your vehicle from moving, change the gear position to 

(

P.

• If only the electric parking brake indicator goes off, immediately get 

your vehicle inspected at a dealer.

1

If the Electric Parking Brake System Indicator Comes On

If you apply the parking brake, it may not release.

If the electric parking brake indicator also turns on, 
the parking brake is still applied.

When the electric parking brake indicator blinks at 
the same time as the electric parking brake system 
indicator, the system must be checked. The parking 
brake may not operate under these conditions.

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Indicator, Coming On/Blinking

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If the Low Tire Pressure/TPMS Indicator Comes On or Blinks

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If the Low Tire Pressure/TPMS Indicator Comes On or 
Blinks

■

Reasons for the indicator to come on or blink

A tire pressure is significantly low. If there is a problem with the TPMS 
with Tire Fill Assist or the compact spare tire

*

 is installed, the indicator 

blinks for about one minute, and then stays on.

■

What to do when the indicator comes on

Drive carefully and avoid abrupt cornering and hard braking.
Stop your vehicle in a safe place. Check the tire pressure and adjust the 
pressure to the specified level. The specified tire pressure is on a label on 
the driver side doorjamb.

■

What to do when the indicator blinks

Have the tire inspected by a dealer as soon as possible. If the compact 
spare tire

*

 causes the indicator to blink, change the tire to a full-size tire. 

The indicator goes off after driving for a few miles (kilometers).

If the Transmission System Indicator Blinks along 
with the Warning Message

■

Reasons for the indicator to blink

There is a problem with the transmission system.

■

What to do when the indicator blinks

• Immediately have your vehicle inspected by a dealer.
• Select 

(

N after starting the engine.

u

Check if the 

(

N position in the instrument panel and the indicator 

on the 

(

N button light/blink.

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The engine cannot be turned on unless the parking brake is set.

2 Starting the Engine P. 465

1

If the Low Tire Pressure/TPMS Indicator Comes On or Blinks

NOTICE

Driving on an extremely underinflated tire can cause 
it to overheat. An overheated tire can fail. Always 
inflate your tires to the prescribed level.

TPMS Fill Assist provides visual and audible assistance 
during tire pressure adjustment. With the power 
mode in ON, while you adjust tire pressure up or 
down, the system alerts you as follows:
Below recommended pressure: The beeper 
sounds and exterior lights flash once every five 
seconds.
At recommended pressure: The beeper sounds 
and exterior lights flash rapidly for ~ five seconds.
Above recommended pressure: The beeper 
sounds and lights flash twice every three seconds.

1

If the Transmission System Indicator Blinks along with the 
Warning Message

You may not be able to start the engine.

Make sure to set the parking brake when parking 
your vehicle.

Call a professional towing service if you need to tow 
your vehicle.

2 Emergency Towing P. 666

* Not available on all models

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Fuses

Fuse Locations

If any electrical devices are not working, set 
the power mode to VEHICLE OFF (LOCK) 
and check to see if any applicable fuse is 
blown.

Fuse locations are shown on the fuse box 
cover. Locate the fuse in question by the 
fuse number and box cover number.
Located near the brake fluid reservoir. Push 
the tabs to open the box.

■

Engine Compartment Fuse 
Box Type A

Tab

■

Circuit protected and fuse rating

Circuit Protected

Amps

1

STRLD

*2

7.5 A

2

−

−

3

ACG FR

15 A

4

Washer

15 A

5

IG1 OP

*1

(7.5 A)

6

ECU FR

7.5 A

7

VBSOL

*1

(10 A)

Starter

*2

7.5 A

8

FI  Sub

15 A

9

DBW

15 A

10

FI Main

15 A

11

IG Coil

15 A

12

DRL R

10 A

13

DRL L

10 A

14

Injector

20 A

15

Radio

*1

20 A

*1:Models without Auto Idle Stop
*2:Models with Auto Idle Stop

16

Back Up

10 A

17

MG Clutch

(7.5 A)

18

FR Fog

*

7.5 A

19

−

−

20

H/L HI R

7.5 A

21

−

−

22

Small

*1

10 A

23

−

−

24

H/L HI L

7.5 A

25

SBW

15 A

26

H/L LO R

10 A

27

H/L LO L

10 A

28

Oil LVL

7.5 A

29

Main Fan

30 A

30

Sub Fan

30 A

31

Wiper Main

30 A

Circuit Protected

Amps

* Not available on all models

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Fuses

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Fuse Locations

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Fuse locations are shown on the fuse box 
cover. Locate the fuse in question by the 
fuse number and box cover number.
Located near the battery. Push the tabs to 
open the box.

■

Engine Compartment Fuse 
Box Type B

Tab

■

Circuit protected and fuse rating

Circuit Protected

Amps

1

Main Fuse

150 A

2

VSA MTR

40 A

VSA FSR

20 A

Stop&Horn Hazard

*

30 A

Hazard

*

RR BLOWER&BMS

30 A

DC/DC 3

*

60 A

RR F/B-2

60 A

AS F/B-2

60 A

EPS

60 A

3

H/L Washer

*

(30 A)

IG1B Main

30 A

R/B Main

60 A

DR F/B-1

50 A

AS F/B-1

50 A

RR F/B-1

60 A

IG1A Main

30 A

DR F/B-2

50 A

4

FI Main

40 A

5

FR Blower

40 A

6

RR  DEF

40 A

7

IG1 Main ST

30 A

8

Stop & Horn

*

20 A

Stop

*

10 A

9

Hazard

10 A

10

BMS

7.5 A

11

Small LT

*

7.5 A

Circuit Protected

Amps

* Not available on all models

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Fuses

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Fuse Locations

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Located near the + terminal on the battery.

Pull up the cover.
Replacement of this fuse should be done by 
a dealer.

Fuse location is shown on the back of the 
positive battery terminal cover.

■

Engine Compartment Fuse 
Box Type C

Fuse

Positive Battery 
Terminal Cover

■

Circuit protected and fuse rating

Circuit Protected

Amps

Fan Main

60 A

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Fuses

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Fuse Locations

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Located under the dashboard.

Fuse locations are shown on the label on 
the outer side of the side panel cover.
Locate the fuse in question by the fuse 
number and label number.

■

Driver’s Side Interior Fuse Box 
Type A

Fuse Box

Fuse Label

■

Circuit protected and fuse rating

Circuit Protected

Amps

1

AS Door Lock

10 A

2

RR DR Door Lock

7.5 A

3

DR Door Lock

7.5 A

4

FR AS Door Unlock

10 A

5

RR DR Door Unlock

7.5 A

6

DR Door Unlock

(7.5 A)

7

D/L Main

20 A

8

−

−

9

ETS TELE

20 A

10

IG1 RR

15 A

11

Meter

*

7.5 A

Shifter

*

12

IG1 FR

20 A

13

ACC

7.5 A

14

−

−

15

DR P/Seat (SLI)

20 A

16

S/R

20 A

17

RR DR P/W

20 A

18

Smart

10 A

19

FR DR P/W

20 A

20

−

−

21

Fuel Pump

20 A

22

IG1 AS

15 A

23

ABS/VSA

*

Smart

*

7.5 A

24

ACG AS

7.5 A

25

STRLD

*

7.5 A

26

IG2 HAC

7.5 A

27

DRL

7.5 A

28

ACC Key Lock

7.5 A

29

DR P/Seat (LUM)

7.5 A

30

INT Lights

7.5 A

31

ETS TILT

20 A

32

DR P/Seat (REC)

20 A

33

−

−

34

−

−

Circuit Protected

Amps

* Not available on all models

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