Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 211

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-43

STEP 4. Check connector B-14 at the barometric pressure
sensor and connector C-58 at ECM <M/T> or connector C-
55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 5.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 5. Using scan tool MB991502, check data list item 25:
Barometric Pressure Sensor.

CAUTION

To prevent damage to scan tool MB991502, always turn the
ignition switch to the "LOCK" (OFF) position before
connecting or disconnecting scan tool MB991502.
(1) Connect scan tool MB991502 to the data link connector.
(2) Turn the ignition switch to the "ON" position.
(3) Set scan tool MB991502 to the data reading mode for item

25, Barometric Pressure Sensor.

•

When altitude is 0 m (0 foot), 101 kPa.

•

When altitude is 600 m (1,969 feet), 95 kPa.

•

When altitude is 1,200 m (3,937 feet), 88 kPa.

•

When altitude is 1,800 m (5,906 feet), 81 kPa.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

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

P.00-6

).

NO : Replace the ECM or PCM. Then go to Step 18.

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

AKX01177

16 PIN

MB991502

AB

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-44

STEP 6. Check connector B-14 at the barometric pressure
sensor and connector C-58 at ECM <M/T> or connector C-
55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between barometric pressure

sensor connector B-14 terminal 2 and ECM connector
C-58 terminal 51 <M/T> or PCM connector C-55
terminal 55 <A/T> because of open circuit or harness
damage. Then go to Step 18.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 7. Check the sensor supply voltage at barometric
pressure sensor connector B-14 by backprobing.
(1) Do not disconnect the connector B-14.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and ground by

backprobing.

•

Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 12.
NO : Go to Step 8.

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

AKX01521AC

B-14 CONNECTOR
HARNESS
SIDE VIEW

1 2 3 4 5 6 7

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-45

STEP 8. Check the sensor supply voltage at ECM
connector C-58 <M/T> or PCM connector C-55 <A/T> by
backprobing.
(1) Do not disconnect the connector C-58 <M/T> or C-55 <A/

T>.

(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 42 <M/T> or 46 <A/

T> and ground by backprobing.

•

Voltage should be between 4.8 and 5.2 volts.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is the voltage normal?

YES : Go to Step 9.
NO : Go to Step 10.

STEP 9. Check connector B-14 at the barometric pressure
sensor and connector C-58 at ECM <M/T> or connector C-
55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Repair harness wire between barometric pressure

sensor connector B-14 terminal 1 and ECM connector
C-58 terminal 42 <M/T> or PCM connector C-55
terminal 46 <A/T> because of open circuit or harness
damage. Then go to Step 18.

NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

AK000230

41424344
48

50 51

49

52 5354555657 58 59

45 46 47

60 61

626364

65

67 68

66

AC

<M/T>

C-58 CONNECTOR
HARNESS SIDE VIEW

AKX01523

AKX01523 AE

41 42 43

44 45 46

47 48 49 50 51 52 53 54 55 56 57
58 59

60 61 62 63

64 65 66

<A/T>

C-55 CONNECTOR
HARNESS SIDE VIEW

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-46

STEP 10. Check connector B-14 at the barometric pressure
sensor and connector C-58 at ECM <M/T> or connector C-
55 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 11.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 18.

STEP 11. Check for short circuit to ground between
barometric pressure sensor connector B-14 terminal 1 and
ECM connector C-58 terminal 42 <M/T> or PCM connector
C-55 terminal 46 <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 18.
NO : Repair it. Then go to Step 18.

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

ACX02480

CONNECTOR : B-14

AF

BAROMETRIC
PRESSURE
SENSOR

AK000225

CONNECTOR : C-58<M/T>, C-55<A/T>

C-55

C-58

PCM<A/T>

ECM<M/T>

AI