Mitsubishi Lancer Evolution 7. Manual - part 181

MPI -

Troubleshooting

13A-23

(3) NG

Adjust the throttle position sensor.

(Refer to P.13A-126.)

NG

Adjust

OK

Intermittent malfunction

(Refer to GROUP 00 - Points to Note

for Intermittent Malfunctions.)

From the previous page

OK

Check and repair the harness between

the throttle position sensor and

engine-ECU.
D

Check for disconnection and

damage of the output wire.

OK

Measure at the C-115 engine-ECU

connector.
D

Measure the engine-ECU terminal

voltage.

D

Ignition switch: ON

D

Voltage between terminal No. 84

and the earth.

OK: Accelerator pedal fully

closed 0.535 - 0.735 V

Accelerator pedal fully

opened 4.5 - 5.0 V

NG

Check the following connector:

C-115

NG

Repair

OK

MUT-II Data list
D

No. 14 Throttle position sensor

(Refer to P.13A-103.)

NG

Replace the engine-ECU.

OK

Check the following connector:

C-115

NG

Repair

OK

Check and repair the harness between

the throttle position sensor and

engine-ECU.
D

Check for short-circuit and

damage of the output wire.

OK

Check the following connector:

C-115

NG

Repair

OK

Check and repair the harness between

the throttle position sensor and

engine-ECU.
D

Check for damage of the power

cable.

D

Check for damage of the earth

wire.

OK

Measure at the B-02 throttle position

sensor connector.
D

Using the test harness

(MB991536), connect the

connector, and measure at the

pickup harness.

D

Ignition switch: ON

(1) Voltage between terminal No. 1

and earth

OK: 4.9 - 5.1 V

(2) Voltage between terminal No. 4

and earth

OK: Less than 0.5 V

(3) Voltage between terminal No. 2

and earth

OK: Accelerator pedal fully

closed 0.535 - 0.735 V

Accelerator pedal fully

opened 4.5 - 5.0 V

(1), (2) NG

Check the following connector:

C-115

NG

Repair

MPI -

Troubleshooting

13A-24

Code No. P0130 Oxygen sensor (front) system

Probable cause

Inspection Range
D

More than 3 minutes passed after completion of start of engine

D

The engine coolant temperature is approximately more than 80_C.

D

The engine speed is more than 1,200 r/min.

D

The volumetric efficiency is 25% or more.

Evaluation Conditions
D

When 5 V is applied to oxygen sensor (front) in engine-ECU while oxygen

sensor (front) output voltage is 0.2 V or less, the sensor output voltage is

4.5 V or more.

D

Oxygen sensor (front) malfunction

D

Oxygen sensor (front) circuit disconnection,

short-circuit, or connector contact defect.

D

Engine-ECU malfunction

OK

To the next page

OK

Check the harness between the

oxygen sensor (front) and

engine-ECU.
D

Check for damage of the output

wire.

NG

Repair

NG

OK

Check the following connector:

C-115

Repair

(2) NG

Check the oxygen sensor (front).

(Refer to P.13A-134.)

NG

Replace the oxygen sensor (front).

OK

Check the harness between the

oxygen sensor (front) and

engine-ECU.
D

Check for damage of the earth

wire.

NG

Repair

OK

Measure at the B-34 oxygen sensor

(front) connector.
D

Using the test harness

(MB998464), connect the

connector, and measure at the

pickup harness.

D

Engine: After warm-up

(1) Voltage between terminal No. 2

and earth

OK: Less than 0.5 V

(2) Voltage between terminal No. 4

and the earth

D

At rapid deceleration from 4,000

r/min

OK: 200 mV or less

D

During rapid racing

OK: 600 - 1,000 mV

(1) NG

Check the following connector:

C-115

NG

Repair

OK

Intermittent malfunction

(Refer to GROUP 00 - Points to Note

for Intermittent Malfunctions.)

OK

MUT-II Data list
D

No. 11 Oxygen sensor (front)

(Refer to P.13A-102.)

NG

Replace engine-ECU.

OK

Check the harness between the

oxygen sensor (front) and

engine-ECU.
D

Check for disconnection and

damage of the earth wire.

NG

Repair

OK

Measure at the B-34 oxygen sensor

(front) connector.
D

Disconnect connector to measure

at the harness side

D

Resistance between terminal No.

2 and earth.

OK: Less than 2 Ω

NG

Check the following connector:

C-115

NG

Repair

NG

Check the following connector:

B-34

NG

Repair

MUT-II Data list
D

No. 11 Oxygen sensor (front)

(Refer to P.13A-102.)

OK

Intermittent malfunction

(Refer to GROUP 00 - Points to Note

for Intermittent Malfunctions.)

MPI -

Troubleshooting

13A-25

OK

Intermittent malfunction

(Refer to GROUP 00 - Points to Note

for Intermittent Malfunctions.)

OK

MUT-II Data list
D

No. 11 Oxygen sensor (front)

(Refer to P.13A-102.)

NG

Replace the engine-ECU.

OK

Check the following connector:

C-115

NG

Repair

OK

Check and repair the harness between

the oxygen sensor (front) and

engine-ECU.
D

Check for disconnection of the

output wire.

OK

Test at the C-115 engine-ECU

connector.
D

Measure the engine-ECU terminal

voltage.

D

Engine: After warm-up

D

Voltage between terminal No. 76

and earth.

D

At rapid deceleration from 4,000

r/min

OK: 200 mV or less

D

During rapid racing

OK: 600 - 1,000 mV

NG

Check the following connector:

C-115

NG

Repair

From the previous page

MPI -

Troubleshooting

13A-26

Code No. P0135 Oxygen sensor heater (front) system

Probable cause

Inspection Range
D

The engine coolant temperature is approximately more than 20_C.

D

The oxygen sensor heater (front) is ON.

D

The engine speed is more than 50 r/min.

D

A/C relay: OFF, radiator fan: OFF

D

The battery voltage is 11 - 16 V.

Evaluation Conditions
D

The oxygen sensor heater (front) current is less than 0.2 A or more than 3.5

A for 4 seconds.

D

Oxygen sensor heater (front) malfunction

D

Oxygen sensor heater (front) circuit disconnection,

short-circuit, or connector contact defect

D

Engine-ECU malfunction

OK

Intermittent malfunction

(Refer to GROUP 00 - Points to Note

for Intermittent Malfunctions.)

OK

Check the trouble symptom.

NG

Replace the engine-ECU.

OK

Check the harness between the

oxygen sensor (front) and

engine-ECU.
D

Check for damage of the earth

wire.

NG

repair

OK

Check the harness between the

oxygen sensor (front) and engine

control relay.
D

Check for damage of the power

cable.

NG

Repair

OK

Check the following connector:

C-118

NG

Repair

OK

Replace the engine-ECU.

NG

OK

Check the harness between the

oxygen sensor (front) and

engine-ECU.
D

Check for disconnection and

short-circuit of the earth wire.

Repair

OK

Measure at the C-118 engine-ECU

connector.
D

Measure the engine-ECU terminal

voltage.

D

Ignition switch: ON

D

Voltage between terminal No. 60

and earth.

OK: System voltage

NG

Check the following connector:

C-118

NG

Repair

OK

Check and repair the harness between

the oxygen sensor (front) and engine

control relay.
D

Check the power cable for

disconnection and short-circuit.

OK

Measure at the B-34 oxygen sensor

(front) connector.
D

Disconnect the connector, and

measure at the harness.

D

Ignition switch: ON

D

Voltage between terminal No. 1

and earth

OK: System voltage

NG

Check the following connector:

B-11X

NG

Repair

OK

Measure at the B-34 oxygen sensor

(front) connector.
D

Disconnect the connector, and

measure at the sensor.

D

Resistance between terminal No.

1 and terminal No. 3.

OK: 4.5 - 8.0 Ω

NG

Replace the oxygen sensor (front).

Check the following connector:

B-34

NG

Repair