Mitsubishi Outlander GS45X. Manual - part 840

 

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Mitsubishi Outlander GS45X. Manual - part 840

 

 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-293

DIAGNOSIS

STEP 1. Check harness connector B-13 at the left bank 
heated oxygen sensor (rear) and harness connector B-10 
at ECM for damage.
Q: Is the harness connector in good condition?

YES : Go to Step 2.
NO :  Repair it. Refer to GROUP 00E, Harness Connector 

Inspection 

P.00E-2

. Then go to Step 4.

STEP 2. Check for short circuit to power supply between 
the left bank heated oxygen sensor (rear) connector B-13 
(terminal No. 4) and the ECM connector B-10 (terminal No. 
40).
Q: Is the harness wire in good condition?

YES : Go to Step 3.
NO :  Repair it. Then go to Step 4.

STEP 3. Check the trouble symptoms.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 22 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0158 set?

YES : Replace the ECM. When the ECM is replaced, 

register the ID code. Refer to GROUP 42B, Diagnosis 
− ID Codes Registration Judgment Table <Vehicles 

with KOS> 

P.42B-15

 or GROUP 42C, Diagnosis 

− ID 

Codes Registration Judgment Table <Vehicles with 
WCM> 

P.42C-10

. Then go to Step 4.

NO :   It can be assumed that this malfunction is 

intermittent. Refer to GROUP 00, How to Use 
Troubleshooting/Inspection Service Points 

− How to 

Cope with Intermittent Malfunctions 

P.00-15

.

STEP 4. Test the OBD-II drive cycle.
(1) Carry out a test drive with the drive cycle pattern. Refer to 

Diagnostic Function 

− OBD-II Drive Cycle − Pattern 22 

P.13B-11

.

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0158 set?

YES : Retry the troubleshooting.
NO :  The inspection is complete.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-294

DTC P0159: Heated Oxygen Sensor Circuit Slow Response (bank 2, sensor 2)

.

AK700141

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

2

1

4

3

AB

1

2

3

4

41

YELLO

W

ORANGE

40

B-10

B-13

MU802665

FROM MFI RELAY

0.5 V

ENGINE
CONTROL
MODULE

TO ECM

LEFT BANK HEATED OXYGEN SENSOR (REAR) CIRCUIT

LEFT BANK HEATED
OXYGEN SENSOR (REAR)

AK700405AB

Left bank heated
oxygen sensor (rear)

Front
exhaust pipe

B-13 (GR)

Connector: B-13

AK700401AB

ECM

B-10 (GR)

Connector: B-10

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-295

CIRCUIT OPERATION

• A voltage corresponding to the oxygen concen-

tration in the exhaust gas is sent to the ECM (ter-
minal No. 40) from the output terminal (terminal 
No. 4) of the left bank heated oxygen sensor 
(rear).

• Terminal No. 2 of the left bank heated oxygen 

sensor (rear) is grounded with ECM (terminal No. 
41).

• The ECM applies an offset voltage of 0.5 volt to 

terminal No. 2 of the left bank heated oxygen 
sensor (rear).

.

TECHNICAL DESCRIPTION

• The output signal of the heated left bank oxygen 

sensor (front) is compensated by the output sig-
nal of the left bank heated oxygen sensor (rear).

• The ECM checks for the left bank heated oxygen 

sensor (rear) output line.

.

DESCRIPTIONS OF MONITOR METHODS

Left bank heated oxygen sensor (rear) output voltage 

does not reach 0.2 volt after fuel cut operation.

.

MONITOR EXECUTION

Continuous

.

MONITOR EXECUTION CONDITIONS 
(Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored 

in memory for the item monitored below)

• Heated oxygen sensor (front) monitor

• Heated oxygen sensor (front) heater monitor

• Heated oxygen sensor (rear) heater monitor

• Heated oxygen sensor (front) inactive monitor

• Heated oxygen sensor offset voltage monitor

• Air/fuel ratio feedback monitor

Sensor (The sensor below is determined to be 

normal)

• Mass airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

.

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-296

DTC SET CONDITION

Logic Flow Chart

.

No

No

No

No

No

No

Good

Malfunction

N = 0

N = N + 1

End

Fuel cut starts?

Fuel cut continues?

Output voltage >= 0.5V 

at fuel cut start?

Output voltage
reaches 0.2V?

No

Start

Yes

Yes

Yes

Yes

No

Yes

Yes

Yes

Yes

Monitoring conditions

Trl >= T0

Tslope > T1

N = 3

Trl       : Time from fuel cut start
Tslope: Time from 0.4 V to 0.2 V
T0, T1: Threshold value

AK900362

 

 

 

 

 

 

 

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