Mitsubishi Outlander XL. Manual — part 267

DTC P0153: Heated Oxygen Sensor Circuit Slow Response (bank 2, sensor 1)

M11310100196USA0000010000

ZK602840

1

2

3 4 5 6 7 8 9 10 11 12 13 14 15 16

17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32

33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48

49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64

0.5 V

2

1

4

3

AA00

ENGINE
CONTROL
MODULE

LEFT BANK HEATED
OXYGEN SENSOR (FRONT)

FROM MFI RELAY

TO ECM

1

2

3

4

39

RED

SKY BLUE

38

LEFT BANK HEATED OXYGEN SENSOR (FRONT) CIRCUIT

B-10

B-14

MU802605

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-263

DIAGNOSTIC TROUBLE CODE PROCEDURES

ZK603594

Left bank heated oxygen
sensor (front)

AA00

B-14 (B)

Connector: B-14

ZK603591

ECM

B-10 (GR)

Connector: B-10

AA00

CIRCUIT OPERATION

｠

A voltage corresponding to the oxygen
concentration in the exhaust gas is sent to the ECM
(terminal No. 38) from the output terminal (terminal
No. 4) of the left bank heated oxygen sensor (front).

｠

Terminal No. 2 of the left bank heated oxygen
sensor (front) is grounded with ECM (terminal No.
39).

｠

The ECM applies an offset voltage of 0.5 volt to
terminal No. 2 of the left bank heated oxygen sensor
(front).

TECHNICAL DESCRIPTION

｠

The left bank heated oxygen sensor (front) detects
the concentration of oxygen in the exhaust gas; it
converts those data to voltage, and inputs the
resulting signals to the ECM.

｠

When the left bank heated oxygen sensor (front)
begins to deteriorate, the left bank heated oxygen
sensor signal response becomes poor.

｠

The ECM also checks for the left bank heated
oxygen sensor (front) rich/lean switch frequency.

DESCRIPTIONS OF MONITOR METHODS

Left bank heated oxygen sensor (front) output
voltage is over specified range.

MONITOR EXECUTION

Continuous

13Ab-264

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES

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

｠

Misfire monitor

｠

Fuel system monitor

Sensor (The sensor below is determined to be
normal)

｠

Mass airflow sensor

｠

Engine coolant temperature sensor

｠

Intake air temperature sensor

｠

Barometric pressure sensor

｠

Throttle position sensor

｠

Accelerator pedal position sensor

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

13Ab-265

DIAGNOSTIC TROUBLE CODE PROCEDURES

DTC SET CONDITION

Logic Flow Chart

Start

Monitoring

conditions

Specified times monitored?

Malfunction

Good

End

No

No

No

No

Yes

Yes

Yes

Yes

Ff > F1

Calculate switching frequency of

front oxygen sensor output signal (Ff)

ZK603714 AA00

Calculate average switching

frequency (Ff) over specified times

Ff < F0

Check Conditions

｠

Engine coolant temperature is higher than 50°C
(122°F).

｠

Engine speed is between 1,250 and 3,500 r/min.

｠

Volumetric efficiency is between 25 and 65 percent.

｠

Under the closed loop air/fuel control.

｠

The accelerator pedal open.

｠

Short-term fuel trim is at between -25 and +25
percent.

｠

More than 2 seconds have elapsed after the above
mentioned conditions have been met.

｠

The ECM monitors for this condition for 5 cycles of
12 seconds each during the drive cycle.

13Ab-266

MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS>

DIAGNOSTIC TROUBLE CODE PROCEDURES