Almera Tino V10 (2003 year). Manual

DTC P0138 HO2S2 (M/T MODELS)

EC-699

[QG (WITHOUT EURO-OBD)]

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal 16 and HO2S2 terminal 2.
Refer to Wiring Diagram.

Check harness continuity between ECM terminal 16 or HO2S2 terminal 2 and ground.
Refer to Wiring Diagram.

Also check harness for short to power.

OK or NG

>> GO TO 4.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK HO2S2 CONNECTOR FOR WATER

Check connectors for water.

OK or NG

>> GO TO 5.

>> Repair or replace harness connector.

CHECK HEATED OXYGEN SENSOR 2

Refer to

EC-699, "Component Inspection"

OK or NG

>> GO TO 6.

>> Replace heated oxygen sensor 2.

CHECK INTERMITTENT INCIDENT

Refer to

EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

EBS00QXD

HEATED OXYGEN SENSOR 2

With CONSULT-II

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for one minute.

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)” as the monitor item with CONSULT-II.

Continuity should exist.

Continuity should not exist.

SEF662Y

EC-700

[QG (WITHOUT EURO-OBD)]

DTC P0138 HO2S2 (M/T MODELS)

Check “HO2S2 (B1)” at idle speed when adjusting “FUEL INJECTION” to

25%.

“HO2S2 (B1)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.56V at least once when the “FUEL INJECTION” is

−

25%.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

Without CONSULT-II

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for one minute.

Set voltmeter probes between ECM terminal 16 (HO2S2 signal) and engine ground.

Check the voltage when revving up to 4,000 rpm under no load
at least 10 times.
(Depress and release accelerator pedal as soon as possible.)
The voltage should be above 0.68V at least once during this
procedure.
If the voltage is above 0.68V at step 6, step 7 is not neces-
sary.

Keep vehicle idling for 10 minutes, then check voltage. Or check
the voltage when coasting from 80 km/h (50 MPH) in 3rd gear
position.
The voltage should be below 0.56V at least once during this
procedure.

If NG, replace heated oxygen sensor 2.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

Removal and Installation

EBS00QXE

HEATED OXYGEN SENSOR 2

Refer to “EXHAUST SYSTEM”, FE-11.

SEF244YA

MBIB0020E

DTC P0138, P0158 HO2S2 (A/T MODELS)

EC-701

[QG (WITHOUT EURO-OBD)]

DTC P0138, P0158 HO2S2 (A/T MODELS)

PFP:226A0

Component Description

EBS00QXF

The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas on each bank.
Even if switching characteristics of the heated oxygen sensor 1 are
shifted, the air-fuel ratio is controlled to stoichiometric, by the signal
from the heated oxygen sensor 2.
This sensor is made of ceramic zirconia. The zirconia generates volt-
age from approximately 1V in richer conditions to 0V in leaner condi-
tions.
Under normal conditions the heated oxygen sensor 2 is not used for
engine control operation.

CONSULT-II Reference Value in Data Monitor Mode

EBS00QXG

Specification data are reference values.

On Board Diagnosis Logic

EBS00QXH

The heated oxygen sensor 2 has a much longer switching time
between rich and lean than the heated oxygen sensor 1. The oxygen
storage capacity of the three way catalyst (manifold) causes the
longer switching time. To judge the malfunctions of heated oxygen
sensor 2, ECM monitors whether the voltage is unusually high during
the various driving condition such as fuel-cut.

SEF327R

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S2 (B1)
HO2S2 (B2)

●

Engine: After warming up

●

Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute under no load

Revving engine from idle to 3,000
rpm quickly.

0 - 0.3V

←→

Approx. 0.6 - 1.0V

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

LEAN

←→

RICH

SEF301U

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0138
0138
(Bank 1)

Heated oxygen sensor 2
circuit high voltage

An excessively high voltage from the sensor
is sent to ECM.

●

Harness or connectors
(The sensor circuit is open or shorted.)

●

Heated oxygen sensor 2

P0158
0158
(Bank 2)

EC-702

[QG (WITHOUT EURO-OBD)]

DTC P0138, P0158 HO2S2 (A/T MODELS)

DTC Confirmation Procedure

EBS00QXI

CAUTION:

Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.

WITH CONSULT-II

Turn ignition switch “ON” and select “DATA MONITOR” mode with CONSULT-II.

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for two minutes.

If 1st trip DTC is detected, go to

EC-706, "Diagnostic Procedure"

WITHOUT CONSULT-II

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for two minutes.

Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.

If 1st trip DTC is detected, go to

EC-706, "Diagnostic Procedure"

SEF189Y

EC-704

[QG (WITHOUT EURO-OBD)]

DTC P0138, P0158 HO2S2 (A/T MODELS)

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Heated oxygen sensor 2
(bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is 3,000 rpm quickly after the fol-
lowing conditions are met.

–

Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

0 - Approximately 1.0V

Sensors' ground
(Heated oxygen sensor)

[Engine is running]

●

Idle speed

Approximately 0V

EC-706

[QG (WITHOUT EURO-OBD)]

DTC P0138, P0158 HO2S2 (A/T MODELS)

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

EBS00QXK

RETIGHTEN GROUND SCREWS

Turn ignition switch “OFF”.

Loosen and retighten engine ground screws.

>> GO TO 2.

CHECK HO2S2 GROUND CIRCUIT FOR OPEN AND SHORT

Disconnect heated oxygen sensor 2 harness connector.

Disconnect ECM harness connector.

Check harness continuity between ECM terminal 74 and HO2S2
terminal 3.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 3.

>> Repair open circuit or short to ground or short to power

in harness or connectors.

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Heated oxygen sensor 2
(bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is 3,000 rpm quickly after the fol-
lowing conditions are met.

–

Keeping the engine speed between 3,500 and
4,000 rpm for one minute and at idle for one
minute under no load

0 - Approximately 1.0V

Sensors' ground
(Heated oxygen sensor)

[Engine is running]

●

Idle speed

Approximately 0V

MBIB0095E

Continuity should exist.

MBIB0094E

DTC P0138, P0158 HO2S2 (A/T MODELS)

EC-707

[QG (WITHOUT EURO-OBD)]

CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.

Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.

Also check harness for short to power.

OK or NG

>> GO TO 4.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK HEATED OXYGEN SENSOR 2

Refer to

EC-707, "Component Inspection"

OK or NG

>> GO TO 5.

>> Replace heated oxygen sensor 2.

CHECK INTERMITTENT INCIDENT

Refer to

EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

EBS00QXL

HEATED OXYGEN SENSOR 2

With CONSULT-II

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for one minute.

DTC

Terminals

Bank

ECM

Sensor

P0138

P0158

Continuity should exist.

DTC

Terminals

Bank

ECM

Sensor

P0138

P0158

Continuity should not exist.

EC-708

[QG (WITHOUT EURO-OBD)]

DTC P0138, P0158 HO2S2 (A/T MODELS)

Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.

Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to

25%.

“HO2S2 (B1)/(B2)” should be above 0.68V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.56V at least once when the “FUEL INJECTION” is

−

25%.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

Without CONSULT-II

Start engine and warm it up to the normal operating temperature.

Turn ignition switch “OFF” and wait at least 10 seconds.

Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least one minute under no
load.

Let engine idle for one minute.

Set voltmeter probes between ECM terminal 16 [HO2S2 (B1) signal] or 17 [HO2S2 (B2) signal] and
engine ground.

Keep vehicle idling for 10 minutes, then check voltage. Or check
the voltage when coasting from 80 km/h (50 MPH) in “D” posi-
tion with “OD” OFF.
The voltage should be below 0.56V at least once during this
procedure.

If NG, replace heated oxygen sensor 2.

CAUTION:

●

Discard any heated oxygen sensor which has been dropped from a height of more than 0.5 m (19.7
in) onto a hard surface such as a concrete floor; use a new one.

SEF662Y

SEF244YA

MBIB0021E

DTC P0138, P0158 HO2S2 (A/T MODELS)

EC-709

[QG (WITHOUT EURO-OBD)]

●

Before installing new oxygen sensor, clean exhaust system threads using Oxygen Sensor Thread
Cleaner tool J-43897-18 or J-43897-12 and approved anti-seize lubricant.

Removal and Installation

EBS00QXM

HEATED OXYGEN SENSOR 2

Refer to

EM-21, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER"

EC-710

[QG (WITHOUT EURO-OBD)]

DTC P0221 TP SENSOR

PFP:16119

Component Description

EBS00QXN

Electric Throttle Control Actuator consists of throttle control motor,
throttle position sensor, etc. The throttle position sensor responds to
the throttle valve movement.
The throttle position sensor has the two sensors. These sensors are
a kind of potentiometers which transform the throttle valve position
into output voltage, and emit the voltage signal to the ECM. In addi-
tion, these sensors detect the opening and closing speed of the
throttle valve and feed the voltage signals to the ECM. The ECM
judges the current opening angle of the throttle valve from these sig-
nals and the ECM controls the throttle control motor to make the
throttle valve opening angle properly in response to driving condi-
tion.

CONSULT-II Reference Value in Data Monitor Mode

EBS00QXO

Specification data are reference values.

*: Throttle position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage signal.

On Board Diagnosis Logic

EBS00QXP

This self-diagnosis has the one trip detection logic.

FAIL-SAFE MODE

When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.

DTC Confirmation Procedure

EBS00QXQ

NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.

PBIB0145E

MONITOR ITEM

CONDITION

SPECIFICATION

THRTL SEN1
THRTL SEN2*

●

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

More than 0.36V

●

Shift lever:
D (A/T models)
1st (M/T models)

Accelerator pedal: Fully depressed

Less than 4.75V

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0221
0221

Throttle position sensor
circuit range/performance
problem

Rationally incorrect voltage is sent to ECM
compared with the signals from TP sensor 1
and TP sensor 2.

●

Harness or connector
(The TP sensor 1 and 2 circuit is open or
shorted.)

●

Electric throttle control actuator
(TP sensor 1 and 2)

Engine operation condition in fail-safe mode

The ECM controls the electric throttle control actuator in regulating the throttle opening in order for the idle position to be within +10
degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal condition.
So, the acceleration will be poor.

DTC P0221 TP SENSOR

EC-711

[QG (WITHOUT EURO-OBD)]

WITH CONSULT-II

Turn ignition switch “ON”.

Select “DATA MONITOR” mode with CONSULT-II.

Start engine and let it idle for 1 second.

If DTC is detected, go to

EC-713, "Diagnostic Procedure"

WITHOUT CONSULT-II

Start engine and let it idle for 1 second.

Turn ignition switch “OFF”, wait at least 10 seconds and then turn “ON”.

Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.

If DTC is detected, go to

EC-713, "Diagnostic Procedure"

SEF058Y

DTC P0221 TP SENSOR

EC-713

[QG (WITHOUT EURO-OBD)]

Specification data are reference values and are measured between each terminal and ground.

CAUTION:

Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.

Diagnostic Procedure

EBS00QXS

RETIGHTEN GROUND SCREWS

Turn ignition switch “OFF”.

Loosen and retighten engine ground screws.

>> GO TO 2.

TERMI-

NAL NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Sensor power supply
(Throttle position sensor)

[Ignition switch “ON”]

Approximately 5V

Throttle position sensor 1

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever position is “D” (A/T models)

●

Shift lever position is “1st” (M/T models)

●

Accelerator pedal fully released

More than 0.36V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever position is “D” (A/T models)

●

Shift lever position is “1st” (M/T models)

●

Accelerator pedal fully depressed

Less than 4.75V

Sensor ground
(Throttle position sensor)

[Engine is running]

●

Warm-up condition

●

Idle speed

Approximately 0V

Throttle position sensor 2

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever position is “D” (A/T models)

●

Shift lever position is “1st” (M/T models)

●

Accelerator pedal fully released

Less than 4.75V

[Ignition switch “ON”]

●

Engine stopped

●

Shift lever position is “D” (A/T models)

●

Shift lever position is “1st” (M/T models)

●

Accelerator pedal fully depressed

More than 0.36V

MBIB0095E

EC-714

[QG (WITHOUT EURO-OBD)]

DTC P0221 TP SENSOR

CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT

Disconnect electric throttle control actuator harness connector.

Turn ignition switch “ON”.

Check voltage between electric throttle control actuator terminal
1 and ground with CONSULT-II or tester.

OK or NG

>> GO TO 4.

>> Repair open circuit or short to ground or short to power

in harness or connectors.

CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT

Turn ignition switch “OFF”.

Disconnect ECM harness connector.

Check harness continuity between ECM terminal 66 and electric throttle control actuator terminal 5.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 4.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal 49 and electric throttle control actuator terminal 4, ECM
terminal 68 and electric throttle control actuator terminal 2.
Refer to Wiring Diagram.

Also check harness for short to ground and short to power.

OK or NG

>> GO TO 5.

>> Repair open circuit or short to ground or short to power in harness or connectors.

CHECK THROTTLE POSITION SENSOR

Refer to

EC-715, "Component Inspection"

OK or NG

>> GO TO 7.

>> GO TO 6.

MBIB0100E

Voltage: Approximately 5V

PBIB0082E

Continuity should exist.

Almera Tino V10 (2003 year). Manual - part 105