Mitsubishi FUEL SPECIFICATIONS
FUEL
CONTENTS
GASOLINE DIRECT INJECTION (GDI) <4G6> 13A...........................
GASOLINE DIRECT INJECTION (GDI) <4G9> 13B...........................
13A-1
FUEL SUPPLY 13C.........................................................
13A-2
GASOLINE DIRECT
INJECTION (GDI)
<4G6>
CONTENTS
GENERAL INFORMATION 3..................
SERVICE SPECIFICATIONS 7.................
SEALANT 7..................................
SPECIAL TOOLS 8..........................
TROUBLESHOOTING 9.......................
ON-VEHICLE SERVICE 97...................
Throttle Body (Throttle Valve Area) Cleaning 97..
Throttle Position Sensor Adjustment 97..........
Accelerator Pedal Position Switch and Accelerator
Pedal Position Sensor Adjustment 98............
Fuel Pressure Test 99..........................
Fuel Leak Check 103...........................
Fuel Pump Connector Disconnection (How to
Reduce the Fuel Pressure) 103.................
Fuel Pump Operation Check 104................
Component Location 105........................
Engine Control Relay, Fuel Pump Relay, Injector
Driver Control Relay and Throttle Valve Control
Servo Relay Continuity Check 106...............
Intake Air Temperature Sensor Check 106.......
Engine Coolant Temperature Sensor Check 106..
Throttle Position Sensor Check 107..............
Accelerator Pedal Position Sensor (1st channel)
Check 108.....................................
Accelerator Pedal Position Sensor (2nd channel)
Check 108.....................................
Accelerator Pedal Position Switch Check 109.....
Oxygen Sensor Check 109......................
Injector Check 111.............................
Throttle V alve Control Servo Check 111..........
Clutch Switch Check 111.......................
Purge Control Solenoid Valve Check 112.........
EGR Valve Check 112..........................
FUEL PUMP (HIGH PRESSURE) AND FUEL
PRESSURE REGULATOR (HIGH
PRESSURE) 113............................
INJECTOR 117.............................
THROTTLE BODY 120.......................
INJECTOR DRIVER 123.....................
THROTTLE VALVE CONTROLLER 124.......
GDI <4G6> -
GENERAL INFORMATION
General Information
13A-3
The Gasoline Direct Injection System consists
of sensors which detect the engine conditions,
the engine-ECU which controls the system
based on signals from these sensors, and
actuators which operate under the control of
the engine-ECU. The engine-ECU carries out
FUEL INJECTION CONTROL
The injector drive times and injector timing are
controlled so that the optimum air/fuel mixture
is supplied to the engine to correspond to the
continually-changing engine operation conditions.
A single injector for each cylinder is mounted
at the cylinder head. The fuel is sent under
pressure from the fuel tank to the fuel pressure
regulator (low pressure) by the fuel pump (low
pressure). The pressure is regulated by the
fuel pressure regulator (low pressure) and the
fuel regulated is then sent to the fuel pump
(high pressure). The fuel under increased
pressure generated by the fuel pump (high
pressure) is then regulated by the fuel pressure
regulator (high pressure) and is then distributed
to each of the injectors via the delivery pipes.
activities such as fuel injection control, idle
speed control and ignition timing control. In
addition, the engine-ECU is equipped with
several diagnosis modes which simplify
troubleshooting when a problem develops.
Fuel injection is normally carried out once for
each cylinder for every two rotations of the
crankshaft. The firing order is 1-3-4-2. This is
called sequential fuel injection.
When the engine is cold or under a severe
load, the “open-loop” control keeps the air/fuel
ratio at a richer than usual level to maintain
driveability. When the engine is under low or
medium loads, the air/fuel ratio becomes leaner
to reduce fuel consumption. When the engine
is running at medium or high loads after having
warmed up, the “closed-loop” control uses the
signal from the oxygen sensor to keep the
air/fuel ratio at the optimum theoretical level.
THROTTLE VALVE OPENING ANGLE CONTROL
This system controls throttle valve opening
angle electronically. The engine-ECU determines how deeply the accelerator pedal is
depressed by means of the accelerator position
sensor (APS). Then the engine-ECU sends a
IDLE SPEED CONTROL
This system maintains engine idle speed at
a predetermined condition by controlling the
air flow that passes through the throttle valve
according to engine idling condition and engine
loads at idling.
IGNITION TIMING CONTROL
The power transistor located in the ignition
primary circuit turns ON and OFF to control
the primary current flow to the ignition coil. This
controls the ignition timing in order to provide
the optimum ignition timing with respect to the
engine operating conditions. The ignition timing
target value of the throttle valve opening angle
to the throttle valve controller. The throttle valve
control servo operates the throttle valve so that
it reaches the target opening angle.
The engine-ECU operates the throttle valve
control servo so that engine speed is
maintained within a map value. The map value
is predetermined according to engine coolant
temperature and air-conditioning load.
is determined by the engine-ECU from the
engine speed, intake air volume, engine coolant
temperature, atmospheric pressure and
injection timing (intake stroke or compression
stroke).
13A-4
GDI <4G6> -
SELF-DIAGNOSIS FUNCTION
D When an abnormality is detected in one
of t h e sensors or actuators related to
emission control, the engine warning lamp
(check engine lamp) illuminates as a
warning to the driver.
D When an abnormality is detected in one
of the sensors or actuators, a diagnosis
OTHER CONTROL FUNCTIONS
1. Fuel Pump Control
Turns the fuel pump relay ON so that current
is supplied to the fuel pump while the engine
is cranking or running.
2. A/C Relay Control
Turns the compressor clutch of the A/C
ON and OFF.
3. Fan Motor Control
The revolutions of the radiator fan and
GENERAL SPECIFICATIONS
General Information
code corresponding to the abnormality is
output.
D The RAM data inside the engine-ECU that
is related to the sensors and actuators can
be read by means of the MUT-II. In addition,
the actuators can be force-driven under
certain circumstances.
condenser fan are controlled in response
to the engine coolant temperature and
vehicle speed.
4. Purge Control Solenoid Valve Control
Refer to GROUP 17.
5. EGR valve Control
Refer to GROUP 17.
Items Specifications
Throttle body Throttle bore mm 65
Throttle position sensor Variable resistor type
Throttle valve control servo Torque motor type
Engine-ECU Identification
model No.
Except vehicles for
Germany
Vehicles for Germany E2T72575 <M/T>
E2T72571 <M/T>
E2T72574 <A/T>
E2T73576 <A/T>
GDI <4G6> -
Items Specifications
Sensors Air flow sensor Karman vortex type
Barometric pressure sensor Semiconductor type
Intake air temperature sensor Thermistor type
Engine coolant temperature sensor Thermistor type
Oxygen sensor Zirconia type
General Information
13A-5
Accelerator pedal position sensor (1st
and 2nd channels)
Accelerator pedal position switch Rotary contact type, within accelerator pedal position
Vehicle speed sensor Magnetic resistive element type
Inhibitor switch Contact switch type
Camshaft position sensor Hall element type
Crank angle sensor Hall element type
Detonation sensor Piezoelectric type
Fuel pressure sensor Metallic membrane type
Power steering fluid pressure switch Contact switch type
Actuators Engine control relay type Contact switch type
Fuel pump relay type Contact switch type
Injector driver control relay Contact switch type
Injector type and number Electromagnetic type, 4
Variable resistor type
sensor (1st channel)
Fuel pressure
regulator (low
pressure)
Fuel pressure
regulator
(high pressure)
Injector identification mark DIM 1100G
Throttle valve control servo relay Contact switch type
Throttle valve control servo Torque motor type
EGR valve Stepper motor type
Purge control solenoid valve Duty cycle type solenoid valve
Regulator pressure kPa 324
Regulator pressure MPa 5.5
13A-6
GDI <4G6> -
General Information
GASOLINE DIRECT INJECTION SYSTEM DIAGRAM
*1 Oxygen sensor
(front)
*2 Air flow sensor
*3 Intake air tempera-
ture senor
*4 Throttle position
sensor (2nd chan-
nel)
*5 Camshaft position
sensor
*6 Crank angle sen-
sor
*7 Barometric pres-
sure sensor
*8 Engine coolant
temperature sen-
sor
*9 Detonation sensor
*10 Fuel pressure sen-
sor
*11 Oxygen Sensor
(rear)
*12 Throttle position
sensor 1
D Power supply
D Ignition switch - IG
D Ignition switch - ST
D Accelerator pedal posi-
tion sensor (1st
channel)
D Accelerator pedal posi-
tion switch
D Vehicle speed sensor
D A/C switch (1st channel)
D A/C switch (2nd chan-
nel)
D M/T oil temperature
sensor
D Inhibitor switch
D Power steering fluid
pressure switch
D Alternator FR terminal
D Stop lamp switch
D Small lamp switch
D Clutch switch
D Brake vacuum sensor
D Injector wire open circuit
check signal
D Throttle valve controller
D A/T-ECU
D Power supply
D Ignition switch - IG
D Accelerator pedal posi-
tion sensor 2
D Engine-ECU
Engine-
ECU
Throttle
valve
control-
ler
z1 Injector driver (In-
jector)
z2 EGR valve (Step-
per motor)
z3 Purge control sole-
noid valve
z4 Throttle valve con-
trol servo
D Engine control relay
D Fuel pump relay
D Injector driver relay
D Throttle valve control
servo relay
D A/C relay
D Ignition coil
D Fan controller
D Engine warning lamp
D Diagnosis output
D Alternator G terminal
D Throttle valve controller
D A/T-ECU
D Engine-ECU
From fuel pump
(low pressure)
To fuel tank
High-pressure fuel
regulator assembly
[integrated in fuel
pressure regulator
(high pressure)]
Fuel pump
(high pressure)
*10 Fuel pressure
sensor
*5 Camshaft position
sensor
*4 Throttle position sensor 2
*12 Throttle position sensor 1
z2 EGR valve
Injector
*8 Engine coolant
temperature sensor
*9 Detonation sensor
*1 Oxygen sensor (front)
z4 Throttle valve
control servo
z1 Injector
driver
z3 Purge control
*3 Intake air temperature
sensor
*2 Air flow sensor
*7 Barometric
pressure sensor
Canister
solenoid valve
*6 Crank angle sensor
*11 Oxygen sensor (rear)
GDI <4G6> -
Service Specifications/Sealant
SERVICE SPECIFICATIONS
Item Standard value
13A-7
Adjustment voltage of throttle position sensor
(1st channel) V
Adjustment voltage of throttle position sensor
(2nd channel) V
Resistance of throttle position sensor kW 1.7 - 3.8
Adjustment voltages (1) and (2) of accelerator pedal position
sensor V
Resistance (1) and (2) of throttle position sensor kW 3.5 - 6.5
Intake air temperature sensor at 20_C 2.3 - 3.0
resistance kW
at 80_C 0.30 - 0.42
Engine coolant temperature at 20_C 2.1 - 2.7
sensor resistance kW
at 80_C 0.26 - 0.36
Fuel pressure High-pressure side MPa 4 - 7.5
Low-pressure side kPa Approximately 324
Injector coil resistance W 0.9 - 1.1
Oxygen sensor output voltage V 0.6 - 1.0
0.4 - 0.6
4.2 - 4.8
0.4 - 1.0
Oxygen sensor heater resistance W 11 - 18
Throttle valve control servo resistance W 1.35 - 1.65
SEALANT
Item Specified sealant Remark
Engine coolant temperature sensor
threaded portion
3M Nut Locking Part No. 4171 or equivalent Drying sealant
13A-8
GDI <4G6> -
Special Tools
SPECIAL TOOLS
Tool Number Name Use
A
B
C
D
MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222
MB991502 MUT-II sub
Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: Probe
assembly
D Fuel gauge simple inspection
A: Connector pin contact pressure inspection
B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester connection
D Reading diagnosis code
D GDI system inspection
MB991348,
MB991658
MB991709 Test harness
MB991519 Alternator harness
MD998478 Test harness
Test harness set D Measurement of voltage during trouble-
connector
(3-pin, triangle)
shooting
D Inspection using an analyzer
Measurement of voltage during
troubleshooting
D Measurement of voltage during trouble-
shooting
D Inspection using an analyzer
MD998464 Test harness
(4-pin, square)
Inspection of oxygen sensor
GDI <4G6> -
Tool UseNameNumber
Special Tools/Troubleshooting
13A-9
MB991529 Diagnosis code
check harness
MD998709 Adaptor hose Measurement of fuel pressure
MD998742 Hose adaptor
MB991637 Fuel pressure
gauge set
Reading diagnosis code
Engine warning lamp
(check engine lamp)
TROUBLESHOOTING
DIAGNOSIS TROUBLESHOOTING FLOW
Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points.
NOTE
If the engine-ECU is replaced, the steering lock cylinder a nd
ignition key should be replaced together with it.
DIAGNOSIS FUNCTION
ENGINE WARNING LAMP (CHECK ENGINE LAMP)
If an abnormality occurs in any of the following items related
to the Gasoline Direct Injection (GDI) system, the engine
warning lamp will illuminate.
If the lamp remains illuminated or if the lamp illuminates while
the engine is running, check the diagnosis code output.
13A-10
GDI <4G6> -
Engine warning lamp inspection items
Troubleshooting
Engine-ECU
Oxygen sensor
Air flow sensor
Intake air temperature sensor
Throttle position sensor (1st channel)
Throttle position sensor (2nd channel)
Engine coolant temperature sensor
Crank angle sensor
Camshaft position sensor
Barometric pressure sensor
Detonation sensor
Injector
Abnormal combustion
Immobilizer system
Abnormal fuel pressure
Brake vacuum sensor
Fuel system malfunction
Accelerator pedal position sensor (1st channel)
Accelerator pedal position sensor (2nd channel)
Electronic-controlled throttle valve system
Throttle valve control servo
Throttle valve controller
METHOD OF READING AND ERASING DIAGNOSIS
CODES
Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points.
INSPECTION USING MUT-IIDATA LIST AND
ACTUATOR TESTING
1. Carry out inspection by means of the data list and the
actuator test function.
If there is an abnormality, check and repair the chassis
harnesses and components.
2. After repairing, re-check using the MUT-IIand check that
the abnormal input and output have returned to normal
as a result of th e repairs.
3. Erase the diagnosis code memory.
4. Remove the MUT-II.
5. Start the engine again and carry out a road test to confirm
that the problem has disappeared.
GDI <4G6> -
Troubleshooting
13A-11
FAIL-SAFE FUNCTION REFERENCE TABLE
If the diagnosis system detects any sensor malfunction, the vehicle can be driven safely by using a
default control logic instead of the faulty sensors.
Defective part or
function
Air flow sensor (1) Disables lean-mixture combustion.
Intake air temperature
sensor
Throttle position
sensor (1st channel)
Throttle position
sensor (2nd channel)
Engine coolant
temperature sensor
Camshaft position
sensor
What to do when a sensor is defective
(2) Determines injector basic operating time and basic ignition timing according to map
value, which has been predetermined by throttle position sensor and crank angle
sensor signals.
Controls as the intake air temperature is 25_C.
(1) Disables lean-mixture combustion.
(2) Controls throttle valve opening angle by closed loop control by using the throttle
position sensor (2nd channel) signal.
(3) Disables the throttle valve opening angle control when the throttle position sensor
(2nd channel) signal is also defective.
(1) Disables lean-mixture combustion.
(2) Controls throttle valve opening angle by closed loop control by using the throttle
position sensor (1st channel) signal.
(3) Disables the throttle valve opening angle control when the throttle position sensor
(1st channel) signal is also defective.
Controls as if the engine coolant temperature is 80_C. (Note that this control will continue
until the ignition switch is turned off even if the sensor signal return to normal.)
Controls according to the conditions before a failure is detected.
Vehicle speed sensor (1) Disables lean-mixture combustion. However, if a predetermined time elapses at an
engine speed of 1,500 r/min or more, the lean-mixture combustion will return to normal.
(2) Disables lean-mixture combustion during engine idling.
Barometric pressure
sensor
Detonation sensor Holds the ignition timing at that for regular gasoline.
Injector (1) Disables lean-mixture combustion.
Abnormal combustion Disables lean-mixture combustion.
Communication line
with A/T-ECU
Alternator FR terminal Disables inhibition control of the alternator output according to electrical load (treats the
Fuel pressure sensor (1) Controls as if the fuel pressure is 5.5 MPa (if there is open or short circuit).
Controls as if the barometric pressure is 101 kPa.
(2) Shuts down exhaust gas recirculation.
Disables ignition timing retard control (engine and transmission total control) during shift
change.
alternator as if it is conventional one).
(2) Turns off the fuel pump relay (if the fuel pressure is excessively high).
(3) Shuts off the fuel injection (If an excessively low pressure is detected or the engine
speed exceeds 3,000 r/min).
13A-12
GDI <4G6> -
Troubleshooting
Defective part or
function
Accelerator pedal
position sensor (1st
channel)
Accelerator pedal
position sensor (2nd
channel)
Electronic-controlled
throttle valve system
Throttle valve position
feedback
Throttle valve control
servo motor malfunction (1st phase)
What to do when a sensor is defective
(1) Disables lean-mixture combustion.
(2) Controls the throttle valve position by using the accelerator pedal position sensor
(2nd channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (2nd channel) signal is also defective, and holds the throttle valve at a
predetermined angle where the vehicle can be driven safely although its performance
is reduced.
(1) Disables lean-mixture combustion.
(2) Controls the throttle valve position by using the accelerator pedal position sensor
(1st channel) signal.
(3) Disables the electronic-controlled throttle valve system if the accelerator pedal position
sensor (1st channel) signal is also defective.
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
Disables lean-mixture combustion.
Throttle valve control
servo motor malfunction (2nd phase)
Communication line
with the throttle valve
controller
(1) Disables the electronic-controlled throttle valve system.
(2) Disables lean-mixture combustion.
(3) Disables idle engine speed feedback control.
(1) Error in communication between the throttle valve controller and engine-ECU
D Disables lean-mixture combustion.
D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
(1) Error in communication between the throttle valve controller and engine-ECU
D Disables lean-mixture combustion.
D Shuts off fuel supply when engine speed exceeds 3,000 r/min.
D The throttle valve controller controls the throttle valve opening angle by using
the accelerator pedal position sensor (2nd channel) signal.
GDI <4G6> -
Troubleshooting
13A-13
INSPECTION CHART FOR DIAGNOSIS CODES
Code No. Diagnosis item Reference page
11 Oxygen sensor (front) system 13A-14
12 Air flow sensor system 13A-15
13 Intake air temperature sensor system 13A-16
14 Throttle position sensor (2nd channel) system 13A-17
21 Engine coolant temperature sensor system 13A-18
22 Crank angle sensor system 13A-19
23 Camshaft position sensor system 13A-20
24 Vehicle speed sensor system 13A-21
25 Barometric pressure sensor system 13A-22
31 Detonation sensor system 13A-23
41 Injector system 13A-24
44 Abnormal combustion 13A-26
54 Immobilizer system 13A-27
56 Abnormal fuel pressure system 13A-28
59 Oxygen sensor (rear) system 13A-30
61 Communication line with A/T-ECU system 13A-31
64 Alternator FR terminal system 13A-31
66 Brake vacuum sensor system 13A-32
77 Accelerator pedal position sensor (2nd channel) system 13A-33
78 Accelerator pedal position sensor (1st channel) system 13A-34
79 Throttle position sensor (1st channel) system 13A-35
89 Abnormality in fuel pressure system 13A-36
91 Electronic-controlled throttle valve system 13A-36
92 Throttle valve position feedback system 13A-37
94 Communication line system with throttle valve controller 13A-37
95 Malfunction in throttle valve control servo motor system (1st phase) 13A-38
99 Malfunction in throttle valve control servo motor system (2nd phase) 13A-38
NOTE
Code No. 56 may be also output when air is sucked in high-pressure fuel line due to no fuel supply.
13A-14
GDI <4G6> -
Troubleshooting
INSPECTION PROCEDURE FOR DIAGNOSIS CODES
Code No. 11 Oxygen sensor (front) system Probable cause
Range of check
D 3 minutes have passed after engine was started.
D Engine coolant temperature is approx. 80_C or more.
D Intake air temperature is 20- 50_C.
D Engine speed is approx. 2,000 - 3,000 r/min
D Vehicle is moving at constant speed on a flat, level road surface
Set conditions
D The oxygen sensor output voltage is around 0.6 V for 30 seconds (does not cross
0.6 V for 30 seconds).
D When the range of check operations given above which accompany starting of
the engine are carried out four time in succession, a problem is detected after
each operation.
D Malfunction of the oxygen sensor (front)
D Improper connector contact, open circuit or
short-circuited harness wire
D Malfunction of the engine-ECU
Check the oxygen sensor (front). (Refer to P.13A-109.)
OK
Measure at the oxygen sensor (front) connector B-17.
D Disconnect the connector, and measure at the
harness side.
(1) Voltage between 2 and earth (Ignition switch: ON)
OK:
(2) Continuity between 4 and earth
Measure at the engine-ECU connector B-54.
D Disconnect the connector, and measure at the
D Voltage between 6 and earth (Ignition switch: ON)
Check the following connector:
Check trouble symptom.
Check the harness wire between the engine-ECU and
the oxygen sensor (front) connector.
Replace the engine-ECU.
System voltage
OK:
Continuity
harness side.
OK:
System voltage
OK
OK
B-54
OK
NG
OK
NG
(1) NG
(2) NG
NG
NG
NG
Replace
Repair
Repair
Check the harness wire between the oxygen sensor (front) and the engine control
relay connector, and repair if necessary.
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the oxygen sensor connector.
OK
Replace the engine-ECU.
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the oxygen sensor (front)
connector, and repair if necessary.
B-54
B-17
NG
NG
NG
Repair
Repair
Repair
GDI <4G6> -
Troubleshooting
Code No.12 Air flow sensor system Probable cause
Range of check
D Engine speed is 500 r/min or more.
Set conditions
D Sensor output frequency is 3.3 Hz or less for 4 seconds.
D Malfunction of the air flow sensor
D Open circuit or short-circuited harness wire of air
flow sensor circuit
D Malfunction of the engine-ECU
13A-15
Measure at the air flow sensor connector
A-07.
D Connect the connector
(Use the test harness MB991709)
(1) Voltage between 3 and earth
(Engine: Idling)
OK:
(2) Voltage between 7 and earth
Replace the engine-ECU.
2.2 - 3.2 V
OK:
0 - 0.1 V
(Engine: Idling)
OK:
6-9V
(Engine speed: 4,000 r/min)
OK
(1) NG
(2) NG
NG
Measure at the air flow sensor connector
A-07.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 4 and earth
(Ignition switch: ON)
OK:
(2) Voltage between 3 and earth
(3) Continuity between 5 and earth
Check the following connector:
A-07
Check trouble symptom.
Replace the air flow sensor.
Measure at the engine-ECU connector
B-54.
D Connect the connector
D Voltage between 19 and earth
Check the following connector:
B-54
Check trouble symptom.
System voltage
(Ignition switch: ON)
OK:
4.8 - 5.2 V
OK:
Continuity
OK
OK
NG
(Ignition switch: ON)
OK:
6-9V
OK
OK
NG
Repair
NG
Repair
(1) NG
(2), (3) NG
NG
Check the harness wire between the
air flow sensor and the engine control
relay, and repair if necessary.
Check the following connectors:
B-51, B-52
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the air flow sensor,
and repair if necessary.
OK
Replace the engine-ECU.
Check the following connector:
A-07
OK
Check trouble symptom.
NG
Replace the air flow sensor.
NG
Repair
NG
Repair
NG
Repair
13A-16
GDI <4G6> -
Troubleshooting
Code No.13 Intake air temperature sensor system Probable cause
Range of check
D After 60 seconds have passed since the engine have started
Set conditions
D Sensor resistance is 0.14 kW or less for 4 seconds.
or
D Sensor resistance is 50 kW or more for 4 seconds.
D Malfunction of the intake air temperature sensor
D Open circuit or short-circuited harness wire of the
intake air temperature sensor circuit
D Malfunction of the engine-ECU
Check the intake air temperature sensor. (Refer to P.13A-106.)
OK
Measure at the air flow sensor connector A-07.
D Disconnect the connector, and measure at the harness
side.
D Voltage between 6 and earth
(Ignition switch: ON)
OK:
OK:
4.8 - 5.2 V
Continuity
OK
OK
A-07
NG
Repair
D Continuity between 5 and earth
Check the following connector:
Check trouble symptom.
NG
NG
NG
Replace
Check the following connectors:
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the intake
air temperature sensor.
OK
Replace the engine-ECU.
B-51, B-52
NG
Repair
NG
Repair
GDI <4G6> -
Troubleshooting
13A-17
Code No.14 Throttle position sensor system (2nd
channel)
The throttle valve controller determines whether a failure is present or not, and sends
a signal indicating its result to the engine-ECU.
Range of check
D Ignition switch: ON
D Throttle position sensor (1st channel) is normal
Set conditions
D The throttle position sensor (1st channel) output voltage is 1.24 V or more, and
the (2nd channel) output voltage is 4.6 V or more for one second.
or
D The throttle position sensor (1st channel) output voltage is 3.53 V or less, and
the (2nd channel) output voltage is 0.2 V or less for one second.
or
D Throttle position sensor (1st and 2nd channels) output voltages are outside 4
to 6 V.
Check the throttle position sensor. (Refer to P.13A-107.)
OK
Measure at throttle position sensor connector A-73.
D Disconnect the connector, and
measure at the harness side.
D Voltage 1 and earth
(Ignition switch: ON)
OK:
OK:
4.8 - 5.2 V
Continuity
OK
D Continuity between 3 and earth
NG
NG
Replace
Check the following connector:
OK
Check trouble symptom.
Probable cause
D Malfunction of throttle position sensor (2nd channel)
D Open circuit or short-circuited harness wire in throttle
position sensor (2nd channel) or poor connector
contact
D Faulty throttle valve controller
D Malfunction of the engine-ECU
B-50
NG
NG
Repair
Check the harness wire between the
throttle position sensor and throttle valve
controller.
OK
Replace the throttle valve controller.
NG
Repair
Measure at engine-ECU connector
B-51.
D Connect the connector.
D Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).
D Voltage between terminal 84 and
earth
(Ignition switch: ON)
OK:
4.2 - 4.8 V
OK
Measure at throttle valve controller connector B-50.
D Connect the connector.
D Disconnect the throttle control servo
connector (Close the throttle valve
fully by finger).
D Voltage between 7 and earth
(Ignition switch: ON)
OK:
0.4 - 0.6 V
OK
Replace the throttle valve controller.
NG
NG
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and throttle position sensor.
NG
Repair
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the
throttle valve controller and throttle position sensor, and repair if necessary.
A-73
A-73
NG
OK
NG
Repair
Adjust the throttle position sensor. (Refer
to P.13A-97.)
Check trouble symptom.
NG
Replace the engine-ECU.
Repair
13A-18
GDI <4G6> -
Troubleshooting
Code No.21 Engine coolant temperature sensor system Probable cause
Range of check
D After 60 seconds have passed since the engine have started
Set conditions
D Sensor resistance is 50 W or less for 4 seconds.
or
D Sensor resistance is 72 kW or more for 4 seconds.
Range of check
D After engine starts
Set conditions
D After 5 minutes or more have passed since the engine coolant temperature
after filtering has dropped from 40_C or more to less than this temperature
D Malfunction of the engine coolant temperature
sensor
D Open circuit or short-circuited harness wire of the
engine coolant temperature sensor circuit
D Malfunction of the engine-ECU
Check the engine coolant temperature sensor.(Refer to P.13A-106.)
OK
Measure at the engine coolant temperature sensor connector A-80.
D Disconnect the connector, and measure st the harness
side.
D Voltage between 1 and earth
(Ignition switch: ON)
OK:
OK:
4.8 - 5.2 V
Continuity
OK
OK
A-80
NG
Repair
D Continuity between 2 and earth
Check the following connector:
Check trouble symptom.
NG
NG
NG
Replace
Check the following connectors:
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the engine
coolant temperature sensor.
OK
Replace the engine-ECU.
B-51, B-52
NG
Repair
NG
Repair
GDI <4G6> -
Troubleshooting
Code No.22 Crank angle sensor system Probable cause
Range of check
D Engine: During cranking
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal is
being input).
D Malfunction of the crank angle sensor
D Open circuit or short-circuited harness wire of the
crank angle sensor circuit
D Malfunction of the engine-ECU
13A-19
Measure at the crank angle sensor connector A-71.
D Connect the connector
(Use the test harness
MD998478)
D V oltage between 2 (black clip)
and earth
(Engine: Cranking)
OK:
D V oltage between 2 (black clip)
Replace the engine-ECU.
0 - 4.0 V
and earth
(Engine: Idling)
OK:
1.5 - 2.5 V
OK
NG
Measure at the crank angle sensor connector A-71.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 3 and earth
(Ignition switch: ON)
OK:
(2) Voltage between 2 and earth
(3) Continuity between 1 and earth
Check the following connector:
A-71
Check trouble symptom.
Replace the crank angle sensor.
System voltage
(Ignition switch: ON)
OK:
4.8 - 5.2 V
OK:
Continuity
OK
OK
NG
NG
Repair
(1) NG
(2) NG
(3) NG
Check the harness wire between the
crank angle sensor and the engine control relay, and repair if necessary.
Check the following connector:
B-51
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the crank angle sensor.
OK
Replace the engine-ECU.
Check the harness wire between the
crank angle sensor and the earth, and
repair if necessary.
NG
Repair
NG
Repair
13A-20
GDI <4G6> -
Troubleshooting
Code No.23 Camshaft position sensor system Probable cause
Range of check
D While engine is cranking or running
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal is
being input).
or
D Abnormal pulse signal pattern is output.
D Malfunction of the camshaft position sensor
D Open circuit or short-circuited harness wire of the
camshaft position sensor
D Malfunction of the engine-ECU
Measure at the camshaft position sensor connector A-78.
D Connect the connector (Use the
test harness MB991709)
D Voltage between 2 and earth
(Engine: Cranking)
OK:
D Voltage between 2 and earth
Replace the engine-ECU.
0 - 4.0 V
(Engine: Idling)
OK:
0.5 - 2.0 V
OK
NG
Measure at the camshaft position sensor connector A-78.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 3 and earth
(Ignition switch: ON)
OK:
(2) Voltage between 2 and earth
(3) Continuity between 1 and earth
Check the following connector:
A-78
Check trouble symptom.
Replace the camshaft position sensor.
System voltage
(Ignition switch: ON)
OK:
4.8 - 5.2 V
OK:
Continuity
OK
OK
NG
NG
Repair
(1) NG
(2) NG
(3) NG
Check the harness wire between the
camshaft position sensor and the engine
control relay, and repair if necessary.
Check the following connector:
B-51
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the camshaft position
sensor.
OK
Replace the engine-ECU.
Check the harness wire between the
camshaft position sensor and the earth,
and repair if necessary.
NG
Repair
NG
Repair
GDI <4G6> -
Troubleshooting
Code No. 24 Vehicles speed sensor system Probable cause
Range of check
D Ignition switch: ON
D Excluding 60 seconds after the ignition switch is turned to ON or immediately
after the engine starts.
D Engine speed is 3,000 r/min or more.
D Driving under high engine load conditions.
Set conditions
D Sensor output voltage does not change for 4 seconds (no pulse signal input).
D Malfunction of the vehicle speed sensor
D Improper connector contact, open circuit or
short-circuited harness wire of the vehicle speed
sensor circuit
D Malfunction of the engine-ECU
13A-21
Does the speedometer operate normally?
Yes
Measure at engine-ECU connector B-51.
D Connect the connector.
D Voltage between terminal 86 and earth
(Ignition switch: ON)
OK:
If the vehicle is moved forward without starting the engine,
0 V and system voltage alternates.
NG
Check the following connectors:
OK
Check trouble symptom.
Check the harness wire between the vehicle speed sensor and
engine-ECU.
A-81, A-85, A-86
NG
Repair
NG
No
OK
Check the vehicle speed sensor circuit. (Refer to GROUP 54 Combination Meter.)
Check the following connector:
OK
Check trouble symptom.
Replace the engine-ECU.
B-51
NG
Repair
NG
13A-22
GDI <4G6> -
Troubleshooting
Code No.25 Barometric pressure sensor system Probable cause
Range of check
D After 60 seconds have passed since the engine have started
D Battery voltage is 8 V or more.
Set conditions
D Sensor output voltage is 0.2 V or less for 4 seconds.
or
D Sensor output voltage is 4.5 V or more for 4 seconds.
D Malfunction of the barometric pressure sensor
D Open circuit or short-circuited harness wire of the
barometric pressure sensor
D Malfunction of the engine-ECU
Measure at the air flow sensor connector
A-07.
D Connect the connector. (Use test
harness MB991709)
D Voltage between 2 and earth
(Ignition switch: ON)
OK:
3.9 - 4.1 V
(at altitude of 0 m)
3.3 - 3.6 V
(at altitude of 1,200 m)
OK
Measure at the engine-ECU connector
B-51.
D Connect the connector.
D Voltage between 85 and earth
(Ignition switch: ON)
OK:
3.9 - 4.1 V
(at altitude of 0 m)
3.3 - 3.6 V
(at altitude of 1,200 m)
OK
Check the following connector:
B-51
NG
Repair
NG
NG
OK
Measure at the air flow sensor connector
A-07.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between 1 and earth
(Ignition switch: ON)
OK:
OK:
4.8 - 5.2 V
Continuity
OK
OK
NG
Repair
OK
(2) Continuity between 5 and earth
Check the following connector:
A-07
Check trouble symptom.
Check the harness wire between the
engine-ECU and the barometric pressure sensor, and repair if necessary.
Check trouble symptom.
NG
NG
NG
Check the following connector:
B-51
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the barometric pressure sensor.
OK
Replace the engine-ECU.
Check the harness wire between the
engine-ECU and the barometric pressure sensor.
OK
Replace the air flow sensor.
Replace the engine-ECU.
NG
Repair
NG
Repair
NG
Repair
GDI <4G6> -
Troubleshooting
Code No.31 Detonation sensor system Probable cause
Range of check
D After 60 seconds have passed since the engine have started
Set conditions
D Amount of change in the sensor output voltage (detonation sensor peak
voltage for each half rotation of the crankshaft) is 0.06 V or less for 200
continuous times.
D Malfunction of the detonation sensor
D Open circuit or short-circuited harness wire of the
detonation sensor
D Malfunction of the engine-ECU
13A-23
Measure at the detonation sensor connector A-79.
D Disconnect the connector, and
measure at the harness side.
D Continuity between 2 and earth
OK:
Continuity
NG
Check the harness wire between the
detonation sensor and the earth, and
repair if necessary.
OK
Check the following connector:
B-51
OK
Check trouble symptom.
NG
NG
Repair
Check the harness wire between the
engine-ECU and the detonation sensor.
OK
Replace the detonation sensor.
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Repair
13A-24
GDI <4G6> -
Troubleshooting
Code No.41 Injector system Probable cause
Range of check
D Engine: while cranking, or running
D Engine speed: 4,000 r/min or less
D System voltage: 10 V or more
D Fuel shut off, or while forcible activating of injector (actuator test) is in operation.
Set conditions
D Injector open circuit check signal is not output from the injector predetermined
time(s).
D Malfunction of the injector
D Faulty injector driver relay
D Faulty injector driver
D Open circuit or short-circuited harness wire in the
injector drive circuit, or poor connector contact
D Malfunction of the engine-ECU
Check the injector. (Refer to P.13A-111.)
OK
Measure at injector driver relay connector A-13X.
D Disconnect the connector, and
measure at the harness side.
(1) Voltage between terminal 4 and
earth
(Ignition switch: ON)
OK:
(2) Voltage between terminal 3 and
Measure at engine-ECU connector
B-54.
D Disconnect the connector, and
D Voltage between terminal 20 and
Measure at injector driver connector
A-08.
D Disconnect the connector, and
(1) Voltage between 12, 21 and earth
(2) Voltage between 13, 22 and earth
(3) Resistance between terminals 14
To the next page
System voltage
earth
OK:
System voltage
OK
measure at the harness side.
earth (Ignition switch: ON)
OK:
System voltage
OK
measure at the harness side.
(Ignition switch: ON)
OK:
System voltage
OK:
System voltage
and 23
Resistance between terminals 15
and 24
Resistance between terminals 16
and 25
Resistance between terminals 17
and 26
OK:
0.9 - 1.1 W
OK
NG
(1) NG
(2) NG
NG
(1) NG
(2) NG
(3) NG
Replace
Check the following connectors:
B-28, B-89, B-103
NG
Repair
Check the following connector:
A-28
NG
Repair
Check the following connector:
A-13X
NG
Repair
Check the following connector:
A-13X
NG
Repair
Check the harness wire between the
injector driver and earth, and repair if
necessary.
Check the following connectors:
A-02, A-03, A-04, A-05, A-06
NG
Repair
OK
OK
OK
OK
OK
Check trouble symptom.
NG
Check the harness wire between the
injector driver relay and ignition switch,
and repair if necessary.
Check trouble symptom.
NG
Check the harness wire between the
injector driver relay and battery, and repair if necessary.
Check trouble symptom.
NG
Check the harness wire between the
injector driver relay and engine-ECU,
and repair if necessary.
Check trouble symptom.
NG
Check the harness wire between the
injector driver and injector driver relay,
and repair if necessary.
Check trouble symptom.
NG
Check the harness wire between the
injector driver and injector, and repair
if necessary.
From the previous page
OK
Measure at engine-ECU connector
B-52.
D Connect the connector.
D Voltage between terminal 51 and
earth (Ignition switch: ON)
OK:
D Voltage between terminal 1 and
Check the following connector:
4.0 - 5.2 V
earth
Voltage between terminal 2 and
earth
Voltage between terminal 14 and
earth
Voltage between terminal 15 and
earth
(Ignition switch: ON)
OK:
8-11V
NG
A-08
NG
Repair
GDI <4G6> -
OK
OK
Check the following connectors:
B-52, B-54
Check trouble symptom.
Replace the injector driver.
Check trouble symptom.
Check trouble symptom.
Troubleshooting
NG
OK
NG
NG
NG
13A-25
Repair
Replace the engine-ECU.
Check the harness wire between the
injector driver and engine-ECU, and repair if necessary.
13A-26
GDI <4G6> -
Troubleshooting
Code No.44 Abnormal combustion Probable cause
Range of check
D While engine is running during lean fuel combustion
Set conditions
D Abnormal engine speed due to mis-firing is detected by the crank angle
sensor
D Malfunction of the ignition coil
D Malfunction of the spark plug
D Malfunction of the EGR valve
D Open circuit or short-circuit in ignition primary
circuit
D Malfunction of the injector system
D Malfunction of the engine-ECU
Check the ignition coil (Refer to GROUP 16 - Ignition System).
OK
Measure at the ignition coil connectors A-74, A-94, A-97, A-98.
D Disconnect the connector, and measure at the harness
side.
(1) Voltage between 1 and earth (Ignition switch: ON)
OK:
(2) Voltage between 3 and earth (Engine: Cranking)
(3) Continuity between 2 and earth
Check the following connectors:
A-74, A-94, A-97, A-98
Check trouble symptom.
Check the following items in the order given.
D Spark plugs
D Compression pressure
Check the injector system (Refer to P.13A-24, INSPECTION PROCEDURE FOR DIAGNOSIS CODE No.41)
Check for air leaking into the air intake system.
D Damaged intake manifold gasket
D Damaged vacuum hose
D Damaged air intake hose
D Check the EGR valve.
System voltage
OK:
0.5 - 4.0 V
OK:
Continuity
OK
OK
NG
Repair
NG
OK
OK
NG
(1) NG
(2) NG
(3) NG
Replace
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the ignition coil and the ignition
switch, and repair if necessary.
Check the following connector:
OK
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and the ignition
coil.
OK
Replace the engine-ECU.
Check the harness wire between the ignition coil and the
earth, and repair if necessary.
B-28, B-89, B-103
NG
Repair
B-54
NG
Repair
NG
Repair
GDI <4G6> -
Troubleshooting
13A-27
Code No.54 Immobilizer system Probable cause
Range of Check
D Ignition switch: ON
Set Conditions
D Improper communication between the engine-ECU and immobilizer-ECU
D Radio interference of encrypted codes
D Incorrect encrypted code
D Malfunction of harness or connector
D Malfunction of immobilizer-ECU
D Malfunction of engine-ECU
NOTE
(1) If the ignition switches are close each other when starting the engine, radio interference may cause
this code to be displayed.
(2) This code may be displayed when registering the key encrypted code.
Is there another ignition key near the ignition key that is inserted
in the ignition switch?
No
Is a diagnosis code output from the immobilizer-ECU?
No
Check the following connector:
Check trouble symptom.
Check the harness wire between the engine-ECU and the immobilizer-ECU.
B-51
OK
NG
NG
Repair
Yes
Yes
NG
OK
Remove the extra ignition key.
NG
Check trouble symptom.
Check the immobilizer system. (Refer to GROUP 54 - Ignition
Switch and Immobilizer System.)
Repair
Replace the engine-ECU and immobilizer-ECU.
13A-28
GDI <4G6> -
Troubleshooting
Code No.56 Abnormal fuel pressure Probable cause
Range of check
D Ignition switch: ON
Set conditions
D Sensor output voltage is 4.8 V or more for four seconds.
or
D Sensor output voltage is 0.2 V or less for four seconds.
Range of check
D After the engine is started, the following condition has been detected:
(1) Engine speed: 1,000 r/min or more
(2) Fuel pressure: 2 MPa or more
D While engine is running
Set conditions
D Fuel pressure is 6.9 MPa or more for four seconds.
or
D Fuel pressure is 2 MPa or less for four seconds.
This diagnosis code is also output when air is sucked in high-pressure fuel line
due to no fuel supply.
In this case, air can be bled by letting the engine run at 2,000 r/min for at least
fifteen seconds. After the air bleeding, the diagnosis code must be erased by the
MUT-II.
D Malfunction of the fuel pressure sensor
D Open circuit or short-circuited harness wire of the
fuel pressure sensor
D Malfunction of the engine-ECU
D Malfunction of the fuel pump (high pressure)
D Malfunction of the fuel pressure regulator (high
pressure)
D Clogged high-pressure fuel line
D Air sucking due to no fuel supply
MUT-IIData list
74 Fuel pressure sensor
D Ignition switch: ON
OK:
0 - 8 MPa
NG
To the next page
OK
MUT-IIData list
74 Fuel pressure sensor
D Maintain the engine speed at 2,000
r/min for at least fifteen seconds.
OK:
6.9 MPa or less
OK
MUT-IIData list
74 Fuel pressure sensor
D Engine: Idle running for at least three
minutes
OK:
4 MPa or more
OK
Erase diagnosis code No.56. (This diagnosis code has been output due to air
sucking into high-pressure fuel line. But
that problem has been resolved by revving the engine at 2,000 r/min.)
Check trouble symptom.
OK
Normal
NG
NG
NG
D Replace the high-pressure fuel
regulator (seized regulator).
D Replace the high-pressure return
pipe (seized pipe).
D Replace the fuel pump (high
pressure) (poor pump discharge
pressure)
D Replace the high-pressure regulator
(fuel leakage at the return side).
Check if input voltage from the fuel
pressure sensor to engine-ECU
changes suddenly by performing an
intermittent malfunction simulation test.
(Refer to GROUP 00 - Points to Note
for Intermittent Malfunction.)
From the previos page
GDI <4G6> -
Troubleshooting
13A-29
Measure at the fuel pressure sensor
connector A-77.
D Connect the connector. (Use test
harness MB991348)
D Voltage between 2 and earth
OK:
3 V or less
(Engine: Cranking)
0.3 - 4.7 V (Engine: Idling)
OK
Measure at the engine-ECU connector
B-51.
D Connect the connector.
D Voltage between 74 and earth
(Engine: idling)
OK:
0.3 - 4.7 V
OK
Check the following connectors:
A-77, B-51
OK
NG
NG
NG
Measure at the fuel pressure sensor
connector A-77.
D Disconnect the connector, and
measure at the harness side.
D Voltage between 1 and earth
(Ignition switch: ON)
OK:
OK:
4.8 - 5.2 V
Continuity
OK
OK
NG
Repair
D Continuity between 3 and earth
Check the following connectors:
A-77, B-51
Check trouble symptom.
Check the harness wire between the
engine-ECU and the fuel pressure sensor, and repair if necessary.
Repair
NG
NG
Check the following connector:
B-51
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the fuel pressure sensor.
OK
Replace the engine-ECU.
Check the harness wire between the
engine-ECU and the fuel pressure sensor.
OK
Replace the fuel pressure sensor.
NG
Repair
NG
Repair
NG
Repair
Check trouble symptom.
NG
Replace the engine-ECU.
13A-30
GDI <4G6> -
Troubleshooting
Code No. 59 Oxygen sensor (rear) system Probable cause
Range of Check
D 3 minutes have passed after engine was started.
D Engine coolant temperature is approx. 80_C or more.
D Idle position switch: OFF
D The throttle position sensor output voltage is 4.1 V or more.
D Open loop control in operation
D 20 seconds have passed after deceleration finished.
Set conditions
D The oxygen sensor (rear) output voltage is 0.1 V or less.
D The difference in the maximum and minimum values for the oxygen sensor (rear)
output voltage is 0.08 V or less.
D The oxygen sensor (rear) output voltage is 0.5 V or more.
D The above conditions continue for a continuous period of 5 seconds.
D Malfunction of the oxygen sensor (rear)
D Improper connector contact, open circuit or
short-circuited harness wire
D Malfunction of the engine-ECU
Check the oxygen sensor (rear). (Refer to P.13A-109.)
OK
Measure at the oxygen sensor (rear) connector C-29.
D Disconnect the connector, and measure at the
harness side.
(1) Voltage between 3 and earth (Ignition switch: ON)
OK:
(2) Continuity between 2 and earth
(3) Continuity between 4 and earth
Check the following connectors:
B-52, C-29
System voltage
OK:
Continuity
OK:
Continuity
OK
OK
NG
(1) NG
(2) NG
(3) NG
NG
Replace
Repair
Check the harness wire between the
oxygen sensor and the control relay
connector, and repair if necessary.
Check the following connector:
B-52
OK
Check trouble symptom.
NG
Check the harness wire between the
engine-ECU and the oxygen sensor
connector.
OK
Replace the engine-ECU.
Check the harness wire between the
oxygen sensor connector and the earth,
and repair if necessary.
NG
NG
Repair
Repair
Check trouble symptom.
NG
Check the harness wire between the engine-ECU and
the oxygen sensor connector.
OK
Replace the oxygen sensor (rear).
Check trouble symptom.
NG
Replace the engine-ECU.
NG
Repair
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