Mitsubishi Eclipse / Eclipse Spyder (2000-2002). Service and repair manual — part 240

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-159

STEP 7. Check connector B-24 at left bank heated oxygen
sensor (front) for damage.
Q: Is the connector in good condition?

YES : Go to Step 8.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 15.

STEP 8. Check the continuity at left bank heated oxygen
sensor (front) harness side connector B-24.
(1) Disconnect the connector B-24 and measure at the harness

side.

(2) Check for the continuity between terminal 2 and ground.

•

Should be less than 2 ohm.

Q: Is the continuity normal?

YES : Go to Step 11.
NO : Go to Step 9.

STEP 9. Check 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 10.
NO : Repair or replace it. Refer to GROUP 00E, Harness

Connector Inspection (

P.00E-2

). Then go to Step 15.

AK000212AB

AK000212

CONNECTOR : B-24

AK000239AC

B-24 HARNESS
SIDE CONNECTOR

2 1
4 3

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-160

STEP 10. Check for open circuit and harness damage
between left bank heated oxygen sensor (front) connector
B-24 terminal 2 and ECM connector C-58 terminal 49 <M/T>
or PCM connector C-55 terminal 57 <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 15.
NO : Repair it. Then go to Step 15.

STEP 11. Check connector C-62 at ECM <M/T> or
connector C-59 at PCM <A/T> for damage.
Q: Is the connector in good condition?

YES : Go to Step 12.
NO : Repair or replace it. Then go to Step 15.

AK000212AB

AK000212

CONNECTOR : B-24

AK000225

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

C-55

C-58

PCM<A/T>

ECM<M/T>

AI

AK000225

CONNECTOR : C-62<M/T>, C-59<A/T>

C-59

C-62

PCM<A/T>

ECM<M/T>

AL

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE>

13B-161

STEP 12. Check for harness damage between left bank
heated oxygen sensor (front) connector B-24 terminal 2
and ECM connector C-58 terminal 49 <M/T> or PCM
connector C-55 terminal 57 <A/T>.
Q: Is the harness wire in good condition?

YES : Go to Step 13.
NO : Repair it. Then go to Step 15.

AK000212AB

AK000212

CONNECTOR : B-24

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-162

STEP 13. Check for short circuit to ground and harness
damage between left bank heated oxygen sensor (front)
connector B-24 terminal 4 and ECM connector C-62
terminal 71 <M/T> or PCM connector C-59 terminal 71 <A/
T>.
Q: Is the harness wire in good condition?

YES : Go to Step 14.
NO : Repair it. Then go to Step 15.

STEP 14. Check the left bank heated oxygen sensor (front).
(1) Disconnect the left bank heated oxygen sensor (front)

connector B-24 and connect test harness special tool,
MD998464, to the connector on the left bank heated
oxygen sensor (front) side.

(2) Warm up the engine until engine coolant 80

°

C (176

°

F) or

higher.

CAUTION

Be very careful when connecting the jumper wires;
incorrect connection can damage the left bank heated
oxygen sensor (front).
(3) Use the jumper wires to connect terminal 1 (red clip) to the

positive battery terminal and terminal 3 (blue clip) to the
negative battery terminal.

(4) Connect a digital volt meter between terminal 2 (black clip)

and terminal 4 (white clip).

(5) While repeatedly revving the engine, measure the left bank

heated oxygen sensor (front) output voltage.

Standard value: 0.6

−

1.0 V

Q: Is the voltage at the standard value?

YES : Replace the ECM or PCM. Then go to Step 15.
NO : Replace the left bank heated oxygen sensor (front).

Then go to Step 15.

AK000212AB

AK000212

CONNECTOR : B-24

AK000225

CONNECTOR : C-62<M/T>, C-59<A/T>

C-59

C-62

PCM<A/T>

ECM<M/T>

AL

ACX02489AC

CONNECTOR : B-24

LEFT BANK
HEATED OXYGEN
SENSOR
(FRONT)

AKX01625AC

BLUE

RED

BLACK

JUMPER
WIRES

WHITE

MD998464