Spark plug incorrect
ECU trouble
Fuel/air mixture incorrect:
Little fuel in tank
Air cleaner clogged, poorly sealed, or missing
Air duct loose
Throttle body assy holder loose
Throttle body assy dust seal damage
Fuel injector O-ring damage
Fuel filter clogged

Actions (chapter)
Inspect or reinstall (see chapter 16).
Inspect (see chapter 16).
Inspect and replace (see chapter 16).
Replace it with the correct plug (see chapter 2).
Inspect (see chapter 3).
Supply fuel (see Owner’s Manual).
Clean element or inspect sealing (see chapter 2).
Reinstall (see chapter 3).
Reinstall (see chapter 3).
Replace (see chapter 3).
Replace (see chapter 3).
Replace fuel filter (see chapter 2).

3-36 FUEL SYSTEM (DFI)
DFI System Troubleshooting Guide
Symptoms or Possible Causes
Fuel pressure regulator trouble
Fuel line clogged
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Main throttle sensor trouble
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Unstable (rough) idling:
Fuel pressure too low or too high
Fuel injector trouble
Main throttle sensor trouble
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Engine vacuum not synchronizing
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Engine stalls easily:
Spark plug dirty, broken or gap maladjusted
Stick coil trouble
Main throttle sensor trouble
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Fuel pump trouble
Fuel injector trouble
Fuel pressure too low or too high
Fuel pressure regulator trouble
Fuel line clogged
Poor acceleration:
Fuel pressure too low
Water or foreign matter in fuel
Fuel filter clogged
Fuel pump trouble
Fuel injector trouble
Main throttle sensor trouble

Actions (chapter)
Inspect fuel pressure and replace fuel pump (see
chapter 3).
Inspect and repair (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect and adjust (see chapter 2).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect and replace (see chapter 16).
Inspect (see chapter 16).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect fuel pressure and replace fuel pump (see
chapter 3).
Inspect and repair (see chapter 3).
Inspect (see chapter 3).
Change fuel. Inspect and clean fuel system (see
chapter 3).
Replace fuel filter (see chapter 2).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).

FUEL SYSTEM (DFI) 3-37
DFI System Troubleshooting Guide
Symptoms or Possible Causes
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Spark plug dirty, broken or gap maladjusted
Stick coil trouble
Stumble:
Fuel pressure too low
Fuel injector trouble
Main throttle sensor trouble
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Surge:
Unstable fuel pressure

Fuel injector trouble
Water temperature sensor trouble
Backfiring when deceleration:
Spark plug dirty, broken or gap maladjusted
Fuel pressure too low
Fuel pump trouble
Main throttle sensor trouble
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble
Air switching valve trouble
Air suction valve trouble
After fire:
Spark plug burned or gap maladjusted
Fuel injector trouble
Intake air pressure sensor #1 trouble
Intake air pressure sensor #2 trouble
Water temperature sensor trouble
Intake air temperature sensor trouble

Actions (chapter)
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect and replace (see chapter 16).
Inspect (see chapter 16).
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect
Inspect

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3).

Fuel pressure regulator trouble (Inspect and
replace fuel pump) or kinked fuel line (Inspect
and replace fuel pump) (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect and replace (see chapter 16).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect and replace (see chapter 16).
Inspect and replace (see chapter 5).
Replace (see chapter 2).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect (see chapter 3).

3-38 FUEL SYSTEM (DFI)
DFI System Troubleshooting Guide
Symptoms or Possible Causes
Other:
Intermittent any DFI fault and its recovery

Actions (chapter)
Check that DFI connectors are clean and tight,
and examine leads for signs of burning or fraying
(see chapter 3).

Poor Running or No Power at High Speed
Symptoms or Possible Causes
Firing incorrect:
Stick coil shorted or not in good contact
Stick coil trouble
Spark plug dirty, broken or gap maladjusted
Spark plug incorrect
ECU trouble
Fuel/air mixture incorrect:
Air cleaner clogged, poorly sealed, or missing
Air duct loose
Throttle body assy holder loose
Throttle body assy dust seal damage
Water or foreign matter in fuel

Actions (chapter)
Inspect or reinstall (see chapter 16).
Inspect (see chapter 16).
Inspect and replace (see chapter 16).
Replace it with the correct plug (see chapter 2).
Inspect (see chapter 3).

Clean element or inspect sealing (see chapter 2).
Reinstall (see chapter 3).
Reinstall (see chapter 3).
Replace (see chapter 3).
Change fuel. Inspect and clean fuel system (see
chapter 3).
Fuel injector O-ring damage
Replace (see chapter 3).
Fuel injector clogged
Inspect and repair (see chapter 3).
Fuel line clogged
Inspect and repair (see chapter 3).
Fuel pump operates intermittently and often DFI Fuel pump bearings may wear. Replace the fuel
fuse blows.
pump (see chapter 3).
Fuel pump trouble
Inspect (see chapter 3).
Intake air pressure sensor #1 trouble
Inspect (see chapter 3).
Intake air pressure sensor #2 trouble
Inspect (see chapter 3).
Cracked or obstructed intake air pressure sensor Inspect and repair or replace (see chapter 3).
#1 and #2 vacuum hoses
Water temperature sensor trouble
Inspect (see chapter 3).
Intake air temperature sensor trouble
Inspect (see chapter 3).
Main throttle sensor trouble
Inspect (see chapter 3).
Subthrottle sensor trouble
Inspect (see chapter 3).
Subthrottle valve actuator trouble
Inspect (see chapter 3).
Knocking:
Fuel poor quality or incorrect
Fuel change (Use the gasoline recommended in
the Owner’s Manual).
Spark plug incorrect
Replace it with the correct plug (see chapter 2).
Stick coil trouble
Inspect (see chapter 16).
ECU trouble
Inspect (see chapter 3).
Engine vacuum not synchronizing
Inspect and adjust (see chapter 2).
Intake air pressure sensor #1 trouble
Inspect (see chapter 3).
Intake air pressure sensor #2 trouble
Inspect (see chapter 3).
Water temperature sensor trouble
Inspect (see chapter 3).

FUEL SYSTEM (DFI) 3-39
DFI System Troubleshooting Guide
Symptoms or Possible Causes
Intake air temperature sensor trouble
Miscellaneous:
Subthrottle sensor trouble
Subthrottle valve actuator trouble
Throttle valves will not fully open

Actions (chapter)
Inspect (see chapter 3).

Inspect (see chapter 3).
Inspect (see chapter 3).
Inspect throttle cables and lever linkage (see
chapter 3).
Engine overheating - Water temperature sensor (see Overheating of Troubleshooting Guide in
or crankshaft sensor trouble
chapter 17)
Air switching valve trouble
Inspect and replace (see chapter 16).
Air suction valve trouble
Inspect and replace (see chapter 5).
Exhaust Smokes Excessively:
(Black smoke)
Air cleaner element clogged
Clean element (see chapter 2).
Fuel pressure too high
Inspect (see chapter 3).
Fuel injector trouble
Inspect (see chapter 3).
Water temperature sensor trouble
Inspect (see chapter 3).
Intake air temperature sensor trouble
Inspect (see chapter 3).
(Brown smoke)
Air duct loose
Reinstall (see chapter 3).
Fuel pressure too low
Inspect (see chapter 3).
Water temperature sensor trouble
Inspect (see chapter 3).
Intake air temperature sensor trouble
Inspect (see chapter 3).

3-40 FUEL SYSTEM (DFI)
Self-Diagnosis
Self-Diagnosis Outline
The self-diagnosis system is monitoring the following
mechanisms.
DFI System and Ignition System
Immobilizer System (Equipped Models)
The following indicator lights (LED) are used for warning
indicators of below table.
Warning Indicators

LED Color
Red [A]
Yellow [B]

Immobilizer (Equipped Models)
FI

The self-diagnosis system has two modes and can be
switched to another mode by operating the meter unit.

User Mode
The ECU notifies the rider of troubles in DFI system, ignition system and immobilizer system (equipped models) by
lighting or blinking the yellow engine warning indicator light
(LED) [A], red warning indicator light (LED) [B] and immobilizer warning indicator [C] when DFI, ignition and immobilizer system parts are faulty, and initiates fail-safe function.
In case of serious troubles, ECU stops the injection and ignition operations.

Dealer Mode
The LCD displays the service code(s) [A] to show the
problem(s) which the above system has at the moment of
diagnosis.

FUEL SYSTEM (DFI) 3-41
Self-Diagnosis
Self-Diagnosis Procedures

○Use

NOTE

a fully charged battery when conducting
self-diagnosis. Otherwise, the warning indicator light
(LED) and indicator do not light or blink.

the ignition switch on and start the engine.
•○Turn
When a problem occurs with DFI system and ignition system, the yellow engine warning indicator light (LED) [A]
stays on after starting the engine to alert the rider.

○When

a problem occurs with immobilizer system
(equipped models), the red warning indicator light
(LED) [A] and immobilizer warning indicator [B] blink.

• Push the left meter button [A] to display the odometer.

the left [A] and right [B] meter buttons for more than
• Push
two seconds.
service code [C] is displayed on the LCD by the num• The
ber of two digits.

3-42 FUEL SYSTEM (DFI)
Self-Diagnosis
of the following procedures ends self-diagnosis.
•○Any
When the service code is displayed on the LCD, push the
left and right meter buttons for more than two seconds.
The display will return to the previous display.
○When the ignition switch is turned off.

Self-Diagnosis Flow Chart

FUEL SYSTEM (DFI) 3-43
Self-Diagnosis
Service Code Reading

○The service code(s) is displayed on the LCD by the number of two digits.

○When there are a number of problems,

all the service
codes can be stored and the display will begin starting
from the lowest number service code in the numerical order.
○Then after completing all codes, the display is repeated
until the ignition switch is turned off or left and right meter
buttons is pushed for more than two seconds.
○For example, if three problems occurred in the order of
56, 11, 24, the service codes are displayed (each two
seconds) from the lowest number in the order listed as
shown below.
(11 → 24 → 56) → (11 → 24 → 56) → · · · (repeated)

Service Code Erasing

service codes stored in memory of the ECU can be erased using Kawasaki Diagnostic System
• The
(KDS Ver.3).
If the Kawasaki Diagnostic System (KDS Ver.3) is not available, do the following procedures.
1. Turn on the ignition switch and start the engine.
2. Keep the idling speed more than 30 seconds.
3. Run the vehicle more than 5 minutes at a speed of 40 km/h (25 mph) or more.
Be sure to keep the engine running during procedures 2 and 3 for more than 10 minutes in total.
4. Turn the ignition switch off.
5. Repeat the above procedures 3 times.
6. Start the engine and check that the yellow engine warning indicator light (LED) goes off.
Service Code Table
○The service codes of the immobilizer system appear to system equipped models.
DTC
Service (Diagnostic
Codes
Trouble
Code)
P0120
11
P0123
P0105
12
P0107
P0110
13
P0112
P0115
14
P0117
P2226
16
P2227
P2228
21
P0335
24
P2158

System

Problems

FI

Main throttle sensor malfunction, wiring open or short

FI

Intake air pressure sensor #1 malfunction, wiring open or
short

FI

Intake air temperature sensor malfunction, wiring open or
short

FI

Water temperature sensor malfunction, wiring open or short

FI

Intake air pressure sensor #2 malfunction, wiring open or
short

FI
FI

Crankshaft sensor malfunction, wiring open or short
Rear wheel rotation sensor malfunction, wiring open or short

3-44 FUEL SYSTEM (DFI)
Self-Diagnosis
DTC
Service (Diagnostic
Codes
Trouble
Code)
P0914
25
P0915
P0916
31
C0064
P0220
32
P0223
P0130
33
P0132
35
–
36
–
39
–
41
P0201
42
P0202
43
P0203
44
P0204
51
P0351
52
P0352
53
P0353
54
P0354
56
P0480
62
P2100
64
P0410
67
P0030
94
P0170
3A

P0443

System

Problems

FI