Mitsubishi Eclipse. Manual - part 612

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-991

STEP 6. Using scan tool MB991958, check data list.

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Check the following items in the data list. Refer to, Data List 

Reference Table 

P.13B-1062

.

a. Item 21: Engine Coolant Temperature Sensor.
b. Item 13: Intake Air Temperature Sensor.

c. Item 25: Barometric pressure Sensor.

d. Item 69: Right Bank Heated Oxygen Sensor (rear).
e. Item 59: Left Bank Heated Oxygen Sensor (rear).

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 7.
NO :  Repair or replace. Then confirm that the malfunction 

symptom is eliminated.

STEP 7. Using scan tool MB991958, check data list item 39: 
Right Bank heated oxygen sensor (front).
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item 

39, Right Bank Heated Oxygen Sensor (front).

• Warm up the engine. When the engine is decelerated 

suddenly from 4,000 r/min, the output voltage should 
increase from 200 millivolts or less to 600 

− 1,000 milli-

volts in a few seconds.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 8.
NO :  Refer to, DTC P0130 

− Heated Oxygen Sensor Circuit  

(bank 1, sensor 1) 

P.13B-214

, DTC P0131 

− Heated 

Oxygen Sensor Circuit Low Voltage (bank 1, sensor 
1) 

P.13B-233

, DTC P0132 

− Heated Oxygen Sensor 

Circuit High Voltage (bank 1, sensor 1) 

P.13B-242

, 

DTC P0133 

− Heated Oxygen Sensor Circuit Slow 

Response (bank 1, sensor 1) 

P.13B-248

, DTC P0134 

− Heated Oxygen Sensor Circuit No Activity Detected 

(bank 1, sensor 1) 

P.13B-254

.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-992

STEP 8. Using scan tool MB991958, check data list item 11: 
Left Bank Heated oxygen sensor (front).
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item 

11, Left Bank Heated Oxygen Sensor (front).

• Output voltage should be 0.6 − 1.0 volt when sudden 

revving.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 9.
NO :  Refer to, DTC P0150 

− Heated Oxygen Sensor Circuit 

(bank 2, sensor 1) 

P.13B-331

, DTC P0151 

− Heated 

Oxygen Sensor Circuit Low Voltage (bank 2, sensor 
1) 

P.13B-350

, DTC P0152 

− Heated Oxygen Sensor 

Circuit High Voltage (bank 2, sensor 1) 

P.13B-358

, 

DTC P0153 

− Heated Oxygen Sensor Circuit Slow 

Response (bank 2, sensor 1) 

P.13B-364

, DTC P0154 

− Heated Oxygen Sensor Circuit No Activity Detected 

(bank 2, sensor 1) 

P.13B-370

.

STEP 9. Using scan tool MB991958, check data list item 39: 
Right Bank Heated oxygen sensor (front).
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item 

39, Right Bank Heated Oxygen Sensor (front).

• Voltage should fluctuate between 0 − 0.4 volt and 0.6 − 

1.0 volt while after the engine has been warmed.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 10.
NO :  Go to Step 12.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-993

STEP 10. Check the EGR system.
Refer to GROUP 17, Emission Control System 

− EGR System 

Check 

P.17-112

.

Q: Is the EGR system normal?

YES : Go to Step 11.
NO :  Repair or replace. Then confirm that the malfunction 

symptom is eliminated.

STEP 11. Using scan tool MB991958, check data list item 
69: Right Bank Heated oxygen sensor (rear).

CAUTION

To prevent damage to scan tool MB991958, always turn the 
ignition switch to the "LOCK" (OFF) position before con-
necting or disconnecting scan tool MB991958.
(1) Connect scan tool MB991958 to the data link connector.
(2) Start the engine and run at idle.
(3) Set scan tool MB991958 to the data reading mode for item 

69, Right Bank Heated Oxygen Sensor (rear).

• Average voltage should be 0.6 volt or less, when idling.

(4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 16.
NO :  Replace the right bank heated oxygen sensor (front). 

Then confirm that the malfunction symptom is 
eliminated.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824 

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-994

STEP 12. Using scan tool MB991958, check data list item 
11: Left Bank Heated oxygen sensor (front).
(1) Start the engine and run at idle.
(2) Set scan tool MB991958 to the data reading mode for item 

11, Left Bank Heated Oxygen Sensor (front).

• Warm up the engine. When the engine is decelerated 

suddenly from 4,000 r/min, the output voltage should 
increase from 200 millivolts or less to 600 

− 1,000 milli-

volts in a few seconds.

(3) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?

YES : Go to Step 13.
NO :  Go to Step 15.

STEP 13. Check the EGR system.
Refer to GROUP 17, Emission Control System 

− EGR System 

Check 

P.17-112

.

Q: Is the EGR system normal?

YES : Go to Step 14.
NO :  Repair or replace. Then confirm that the malfunction 

symptom is eliminated.

AK300810

AB

MB991911

16-PIN

MB991827

MB991824