Mitsubishi Eclipse. Manual - part 440

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-303

STEP 4. Check for short circuit to ground between right
bank heated oxygen sensor (rear) connector B-28
(terminal No. 4) and ECM connector C-62 (terminal No. 74)
<M/T> or PCM connector C-59 (terminal No. 74) <A/T>.
Q: Is the harness wire in good condition?

YES : Replace the ECM or PCM. Then go to Step 5.
NO : Repair it. Then go to Step 5.

AK300445

97 96

100

72
79

CONNECTOR: C-62 <M/T>

C-62 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300429

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: B-28

B-28 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-304

STEP 5. 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 − Procedure 6 −

Other Monitor

P.13B-7

(2) Check the diagnostic trouble code (DTC).
Q: Is DTC P0137 set?

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

AK300460

72
79
91

73
80

81
92

CONNECTOR: C-59 <A/T>

C-59 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

AK300445

97 96

100

72
79

CONNECTOR: C-62 <M/T>

C-62 (GR)

HARNESS CONNECTOR:
COMPONENT SIDE

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-305

DTC P0138: Heated Oxygen Sensor Circuit High Voltage (bank 1, sensor 2)

AK103015

BLA

PINK

BLUE

3 4

1 2

FROM MFI RELAY

RIGHT BANK HEATED
OXYGEN SENSOR (REAR)

TO ECM
OR PCM

74<M/T>*2
74<A/T>*4

49<M/T>*1
57<A/T>*3

B-28
MU802665

NOTE
*1: ECM connector C-58 <M/T>
*2: ECM connector C-62 <M/T>
*3: PCM connector C-55 <A/T>
*4: PCM connector C-59 <A/T>

ENGINE CONTROL
MODULE (ECM) <M/T>
OR
POWERTRAIN CONTROL
MODULE (PCM) <A/T>

43
50

42
49

41
48
60 61

46 47
58 59
67 68

56
66

C-58 <M/T>
(MU803782)

C-55 <A/T>
(MU803781)

42 43
48 49 50 51 52 53 54 55 56 57

58 59

60 61 62 63

64 65 66

88 89

76 77

72
79
91

73
80

81
92

82 83
93

84 85

86 87

95 96

100

76 77

72
79

C-62 <M/T>
(MU803783)

C-59 <A/T>
(MU803782)

Right Bank Heated Oxygen Sensor (rear) Circuit

S142

MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS

TSB Revision

MULTIPORT FUEL INJECTION (MFI) <3.0L>

13B-306

CIRCUIT OPERATION

• A voltage corresponding to the oxygen concen-

tration in the exhaust gas is sent to the ECM (ter-
minal No. 74) <M/T> or PCM (terminal No. 74)
<A/T> from the output terminal (terminal No. 4) of
the right bank heated oxygen sensor (rear).

• Terminal No. 2 of the right bank heated oxygen

sensor (rear) is grounded with ECM (terminal No.
49) <M/T> or PCM (terminal No. 57) <A/T>.

TECHNICAL DESCRIPTION

• The output signal of the right bank heated oxygen

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

• The ECM <M/T> or PCM <A/T> checks for an

open circuit in the right bank heated oxygen sen-
sor (rear) output line.

DESCRIPTIONS OF MONITOR METHODS
Right bank heated oxygen sensor (rear) output volt-

age is over specified range.

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 heater (front) monitor

• Heated oxygen sensor heater (rear) monitor

• Air/fuel ratio feedback monitor

Sensor (The sensor below is determined to be

normal)

• Volume airflow sensor

• Engine coolant temperature sensor

• Intake air temperature sensor

• Barometric pressure sensor

AK300075

RIGHT BANK
HEATED OXYGEN
SENSOR (REAR)

CONNECTOR: B-28

B-28 (GR)

AK300091

CONNECTORS: C-58, C-62 <M/T>

ECM

C-58 (GR)

C-62 (GR)

AK300244

CONNECTORS: C-55, C-59 <A/T>

PCM

C-55 (GR)

C-59 (GR)

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