Almera Tino V10 (2003 year). Manual

DTC P0134 HO2S1 (M/T MODELS)

EC-235

[QG (WITH EURO-OBD)]

CHECK HEATED OXYGEN SENSOR 1

Refer to

EC-235, "Component Inspection"

OK or NG

>> GO TO 5.

>> Replace heated oxygen sensor 1.

CHECK INTERMITTENT INCIDENT

Refer to

EC-138, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

EBS00QKE

HEATED OXYGEN SENSOR 1

With CONSULT-II

Start engine and warm it up to normal operating temperature.

Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.

Select “HO2S1 (B1)” and “HO2S1 MNTR (B1)”.

Hold engine speed at 2,000 rpm under no load during the follow-
ing steps.

Touch “RECORD” on CONSULT-II screen.

Check the following.

●

“HO2S1 MNTR (B1)” in “DATA MONITOR” mode changes
from “RICH” to “LEAN” to “RICH” more than 5 times in 10 sec-
onds.
5 times (cycles) are counted as shown at right.

●

“HO2S1 (B1)” voltage goes above 0.6V at least once.

●

“HO2S1 (B1)” voltage goes below 0.3V at least once.

●

“HO2S1 (B1)” voltage never exceeds 1.0V.

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.

SEF646Y

SEF217YA

SEF648Y

EC-236

[QG (WITH EURO-OBD)]

DTC P0134 HO2S1 (M/T MODELS)

●

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 normal operating temperature.

Set voltmeter probes between ECM terminal 35 (HO2S1 signal) and engine ground.

Check the following with engine speed held at 2,000 rpm con-
stant under no load.

●

The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.

●

The maximum voltage is over 0.6V at least one time.

●

The minimum voltage is below 0.3V at least one time.

●

The voltage never exceeds 1.0V.

1 time: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

2 times: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

→

0.6 - 1.0V

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

EBS00QKF

HEATED OXYGEN SENSOR 1

Refer to

EM-21, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER"

MBIB0018E

DTC P0134, P0154 HO2S1 (A/T MODELS)

EC-237

[QG (WITH EURO-OBD)]

DTC P0134, P0154 HO2S1 (A/T MODELS)

PFP:22690

Component Description

EBS00QKG

The heated oxygen sensor 1 is placed into the exhaust manifold. It
detects the amount of oxygen in the exhaust gas compared to the
outside air. The heated oxygen sensor 1 has a closed-end tube
made of ceramic zirconia. The zirconia generates voltage from
approximately 1V in richer conditions to 0V in leaner conditions. The
heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts
the injection pulse duration to achieve the ideal air-fuel ratio. The
ideal air-fuel ratio occurs near the radical change from 1V to 0V.

CONSULT-II Reference Value in Data Monitor Mode

EBS00QKH

Specification data are reference values.

On Board Diagnosis Logic

EBS00QKI

Under the condition in which the heated oxygen sensor 1 signal is
not input, the ECM circuits will read a continuous approximately
0.3V. Therefore, for this diagnosis, the time that output voltage is
within 200 to 400 mV range is monitored, and the diagnosis checks
that this time is not inordinately long.

SEF463R

SEF288D

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S1 (B1)
HO2S1 (B2)

●

Engine: After warming up

Maintaining engine speed at 2,000
rpm

0 - 0.3V

←→

Approx. 0.6 - 1.0V

HO2S1 MNTR (B1)
HO2S1 MNTR (B2)

LEAN

←→

RICH

Changes more than 5 times dur-
ing 10 seconds.

SEF237U

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0134
0134
(Bank 1)

Heated oxygen sensor 1
circuit no activity detected

The voltage from the sensor is constantly
approx. 0.3V.

●

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

●

Heated oxygen sensor 1

P0154
0154
(Bank 2)

EC-238

[QG (WITH EURO-OBD)]

DTC P0134, P0154 HO2S1 (A/T MODELS)

DTC Confirmation Procedure

EBS00QKJ

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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.

WITH CONSULT-II

Start engine and warm it up to normal operating temperature.

Select “HO2S1 (B1) P0134” or “HO2S1 (B2) P0154” of “HO2S1” in “DTC WORK SUPPORT” mode with
CONSULT-II.

Touch “START”.

Let it idle for at least 3 minutes.
NOTE:
Never raise engine speed above 3,200 rpm after this step. If
the engine speed limit is exceeded, return to step 4.

When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 10 to 60 seconds.)

If “TESTING” is not displayed after 5 minutes, retry from
step 2.

Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to

EC-243, "Diagnostic

Procedure"

Overall Function Check

EBS00QKK

Use this procedure to check the overall function of the heated oxygen sensor 1 circuit. During this check, a
DTC might not be confirmed.

WITH GST

Start engine and warm it up to normal operating temperature.

Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] or 36 [HO2S1 (B2) signal] and
engine ground.

PBIB0544E

ENG SPEED

1,500 - 3,400 rpm

Vehicle speed

More than 64 km/h (40 MPH)

B/FUEL SCHDL

3.3 - 8.7 msec

Selector lever

Suitable position

PBIB0545E

SEC750C

DTC P0134, P0154 HO2S1 (A/T MODELS)

EC-239

[QG (WITH EURO-OBD)]

Check the following with engine speed held at 2,000 rpm con-
stant under no load.

–

The voltage does not remain in the range of 0.2 to 0.4V.

If NG, go to

EC-243, "Diagnostic Procedure"

MBIB0019E

DTC P0134, P0154 HO2S1 (A/T MODELS)

EC-241

[QG (WITH 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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Heated oxygen sensor 1
(bank 1)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)

Sensors' ground
(Heated oxygen sensor)

[Engine is running]

●

Idle speed

Approximately 0V

DTC P0134, P0154 HO2S1 (A/T MODELS)

EC-243

[QG (WITH 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

EBS00QKM

INSPECTION START

Turn ignition switch “OFF”.

Loosen and retighten engine ground screws.

>> GO TO 2.

CHECK HO2S1 GROUND CIRCUIT FOR OPEN AND SHORT

Disconnect heated oxygen sensor 1 harness connector.

Disconnect ECM harness connector.

Check harness continuity between ECM terminal 74 and HO2S1
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.

TERMI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Heated oxygen sensor 1
(bank 2)

[Engine is running]

●

Warm-up condition

●

Engine speed is 2,000 rpm.

0 - Approximately 1.0V
(Periodically change)

Sensors' ground
(Heated oxygen sensor)

[Engine is running]

●

Idle speed

Approximately 0V

MBIB0095E

Continuity should exist.

MBIB0092E

EC-244

[QG (WITH EURO-OBD)]

DTC P0134, P0154 HO2S1 (A/T MODELS)

CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

Check harness continuity between ECM terminal and HO2S1 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 1

Refer to

EC-244, "Component Inspection"

OK or NG

>> GO TO 5.

>> Replace malfunctioning heated oxygen sensor 1.

CHECK INTERMITTENT INCIDENT

Refer to

EC-138, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

>> INSPECTION END

Component Inspection

EBS00QKN

HEATED OXYGEN SENSOR 1

With CONSULT-II

Start engine and warm it up to normal operating temperature.

Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-
II.

Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”.

Hold engine speed at 2,000 rpm under no load during the following steps.

DTC

Terminals

Bank

ECM

Sensor

P0134

P0154

Continuity should exist.

DTC

Terminals

Bank

ECM

Sensor

P0134

P0154

Continuity should not exist.

DTC P0134, P0154 HO2S1 (A/T MODELS)

EC-245

[QG (WITH EURO-OBD)]

Touch “RECORD” on CONSULT-II screen.

Check the following.

●

“HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode
changes from “RICH” to “LEAN” to “RICH” more than 5 times
in 10 seconds.
5 times (cycles) are counted as shown at right.

●

“HO2S1 (B1)/(B2)” voltage goes above 0.6V at least once.

●

“HO2S1 (B1)/(B2)” voltage goes below 0.3V at least once.

●

“HO2S1 (B1)/(B2)” voltage never exceeds 1.0V.

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 normal operating temperature.

Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] or 36 [HO2S1 (B2) signal] and
engine ground.

Check the following with engine speed held at 2,000 rpm con-
stant under no load.

●

The voltage fluctuates between 0 to 0.3V and 0.6 to 1.0V
more than 5 times within 10 seconds.

●

The maximum voltage is over 0.6V at least one time.

●

The minimum voltage is below 0.3V at least one time.

●

The voltage never exceeds 1.0V.

1 time: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

2 times: 0 - 0.3V

→

0.6 - 1.0V

→

0 - 0.3V

→

0.6 - 1.0V

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.

SEF646Y

SEF647Y

SEF648Y

MBIB0019E

DTC P0138 HO2S2 (M/T MODELS)

EC-247

[QG (WITH EURO-OBD)]

DTC P0138 HO2S2 (M/T MODELS)

PFP:226A0

Component Description

EBS00QKP

The heated oxygen sensor 2, after three way catalyst (manifold),
monitors the oxygen level in the exhaust gas.
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

EBS00QKQ

Specification data are reference values.

On Board Diagnosis Logic

EBS00QKR

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)

●

Engine: After warming up

●

Keeping the engine speed
between 3,500 and 4,000 rpm
for one minute and at idle 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)

LEAN

←→

RICH

SEF301U

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P0138
0138

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

EC-248

[QG (WITH EURO-OBD)]

DTC P0138 HO2S2 (M/T MODELS)

DTC Confirmation Procedure

EBS00QKS

CAUTION:

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 at between 3,500 and
4,000 rpm for least one minute under no load.

Let engine idle for two minutes.

If 1st trip DTC is detected, go to

EC-250, "Diagnostic Procedure"

WITH GST

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.

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.

Select “Mode 3” with GST.

If NG, go to

EC-250, "Diagnostic Procedure"

●

When using GST, “DTC Confirmation Procedure” should be performed twice as much as when
using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis.
Therefore, using CONSULT-II is recommended.

SEF174Y

DTC P0138 HO2S2 (M/T MODELS)

EC-249

[QG (WITH EURO-OBD)]

Wiring Diagram

EBS00QKT

YEC446A

EC-250

[QG (WITH EURO-OBD)]

DTC P0138 HO2S2 (M/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

EBS00QKU

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

[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.

MBIB0256E

Almera Tino V10 (2003 year). Manual - part 76