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Infiniti I30. Emission Control System (2003 year). Instruction - part 15

Diagnostic Procedure

NHEC0879

INSPECTION START

1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 harness connector.

SEC099D

SEC134D

䊳

GO TO 2.

RETIGHTEN HEATED OXYGEN SENSOR 1

Loosen and retighten corresponding heated oxygen sensor 1.

Tightening torque:

40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)

䊳

GO TO 3.

IDX

DTC P0132, P0152 HO2S1

Diagnostic Procedure

EC-225

CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 terminal as follows.

Refer to Wiring Diagram.

MTBL1144

Continuity should exist.

3. Check harness continuity between ECM terminal or HO2S1 terminal and ground as follows.

Refer to Wiring Diagram.

MTBL1145

Continuity should not exist.

4. Also check harness for short to power.

OK or NG

䊳

GO TO 4.

䊳

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

CHECK HO2S1 CONNECTOR FOR WATER

1. Disconnect heated oxygen sensor 1 harness connector.
2. Check connectors for water.

Water should not exist.

OK or NG

OK (With CONSULT-II)

䊳

GO TO 5.

OK (Without CONSULT-
II)

䊳

GO TO 6.

䊳

Repair or replace harness or connectors.

DTC P0132, P0152 HO2S1

Diagnostic Procedure (Cont’d)

EC-226

CHECK HEATED OXYGEN SENSOR 1

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGER POINT” to 100% in “DATA MONITOR” mode with CONSULT-II.
3. Select “HO2S1 (B1)/(B2)” and “HO2S1 MNTR (B1)/(B2)”.
4. Hold engine speed at 2,000 rpm under no load during the following steps.
5. Touch “RECORD” on CONSULT-II screen.

SEF967Y

6. Check the following.

쐌

“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 left:

SEF647Y

쐌

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

쐌

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

쐌

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

SEF648Y

CAUTION:

쐌

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.

쐌

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.

OK or NG

䊳

GO TO 7.

䊳

Replace malfunctioning heated oxygen sensor 1.

IDX

DTC P0132, P0152 HO2S1

Diagnostic Procedure (Cont’d)

EC-227

CHECK HEATED OXYGEN SENSOR 1

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 91 (HO2S1 bank 1 signal) or 92 (HO2S1 bank 2 signal) and engine

ground.

3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEC109D

CAUTION:

쐌

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.

쐌

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.

OK or NG

䊳

GO TO 7.

䊳

Replace malfunctioning heated oxygen sensor 1.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

DTC P0132, P0152 HO2S1

Diagnostic Procedure (Cont’d)

EC-228

SEF463R

SEF288D

Component Description

NHEC0880

The heated oxygen sensor 1 is placed into the front tube. 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 approxi-
mately 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

NHEC0881

Specification data are reference values.

MONITOR ITEM

CONDITION

SPECIFICATION

HO2S1 (B1)
HO2S1 (B2)

쐌

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 during
10 seconds.

SEF010V

On Board Diagnosis Logic

NHEC0883

To judge the malfunction of heated oxygen sensor 1, this diagno-
sis measures response time of heated oxygen sensor 1 signal. The
time is compensated by engine operating (speed and load), fuel
feedback control constant, and heated oxygen sensor 1 tempera-
ture index. Judgment is based on whether the compensated time
[heated oxygen sensor 1 cycling time index] is inordinately long or
not.

IDX

DTC P0133, P0153 HO2S1

Component Description

EC-229

DTC No.

Trouble diagnosis

name

DTC Detecting Condition

Possible Cause

P0133
0133
(Bank 1)
P0153
0153
(Bank 2)

Heated oxygen sen-
sor 1 circuit slow
response

The response of the voltage signal from the sen-
sor takes more than the specified time.

쐌

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

쐌

Heated oxygen sensor 1

쐌

Heated oxygen sensor 1 heater

쐌

Fuel pressure

쐌

Injectors

쐌

Intake air leaks

쐌

Exhaust gas leaks

쐌

PCV valve

쐌

Mass air flow sensor

DTC Confirmation Procedure

NHEC0884

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:

쐌

Always perform at a temperature above −10°C (14°F).

쐌

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

DTC P0133, P0153 HO2S1

On Board Diagnosis Logic (Cont’d)

EC-230

SEF338Z

SEF339Z

SEF658Y

WITH CONSULT-II

NHEC0884S01

Start engine and warm it up to normal operating temperature.

Stop engine and wait at least 5 seconds.

Turn ignition switch “ON” and select “HO2S1 (B1)/(B2) P0133/
P0153” of “HO2S1” in “DTC WORK SUPPORT” mode with
CONSULT-II.

Touch “START”.

Start engine and let it idle for at least 3 minutes.

NOTE:
Never raise engine speed above 3,600 rpm after this step. If
the engine speed limit is exceeded, return to step 5.
6)

When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions
continuously until “TESTING” changes to “COMPLETED”. (It
will take approximately 40 to 50 seconds.)

ENG SPEED

1,200 - 3,100 rpm

Vehicle speed

More than 80 km/h (50 MPH)

B/FUEL SCHDL

2.5 - 12 msec

Selector lever

Suitable position

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

Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”.

“NG”

displayed,

refer

“Diagnostic

Procedure”, EC-234.

SEC902C

Overall Function Check

NHEC0885

Use this procedure to check the overall function of the heated oxy-
gen sensor 1 circuit. During this check, a DTC might not be con-
firmed.

WITH GST

NHEC0885S01

Start engine and warm it up to normal operating temperature.

Set voltmeter probes between ECM terminal 91 (HO2S1 bank
1 signal) or 92 (HO2S1 bank 2 signal) and engine ground.

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

쐌

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

→

- 0.3V

If NG, go to “Diagnostic Procedure”, EC-234.

IDX

DTC P0133, P0153 HO2S1

DTC Confirmation Procedure (Cont’d)

EC-231

Wiring Diagram

NHEC0886

BANK 1

NHEC0886S01

MEC537D

SEC107D

DTC P0133, P0153 HO2S1

Wiring Diagram

EC-232

BANK 2

NHEC0886S02

MEC538D

SEC108D

IDX

DTC P0133, P0153 HO2S1

Wiring Diagram (Cont’d)

EC-233

Diagnostic Procedure

NHEC0887

RETIGHTEN GROUND SCREWS

1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.

SEC047D

䊳

GO TO 2.

RETIGHTEN HEATED OXYGEN SENSOR 1

Loosen and retighten corresponding heated oxygen sensor 1.

Tightening torque:

40 - 60 N·m (4.1 - 6.1 kg-m, 30 - 44 ft-lb)

䊳

GO TO 3.

CHECK FOR EXHAUST GAS LEAK

1. Start engine and run it at idle.
2. Listen for an exhaust gas leak before three way catalyst (manifold).

SEC502D

OK or NG

䊳

GO TO 4.

䊳

Repair or replace.

CHECK FOR INTAKE AIR LEAK

Listen for an intake air leak after the mass air flow sensor.

OK or NG

䊳

GO TO 5.

䊳

Repair or replace.

DTC P0133, P0153 HO2S1

Diagnostic Procedure

EC-234

CLEAR THE SELF-LEARNING DATA

With CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Select “SELF-LEARNING CONT” in “WORK SUPPORT” mode with CONSULT-II.
3. Clear the self-learning control coefficient by touching “CLEAR”.

SEF968Y

4. Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF”.
3. Disconnect mass air flow sensor harness connector, and restart and run engine for at least 5 seconds at idle speed.
4. Stop engine and reconnect mass air flow sensor harness connector.
5. Make sure DTC P0102 is displayed.
6. Erase the DTC memory. Refer to “HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION”, EC-89.
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.

Is the 1st trip DTC P0171, P0172, P0174 or P0175 detected?
Is it difficult to start engine?

Yes or No

Yes

䊳

Perform trouble diagnosis for DTC P0171, P0174 or P0172, P0175. Refer to EC-267,
EC-275.

䊳

GO TO 6.

IDX

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-235

DISCONNECT HO2S1 HARNESS CONNECTOR

1. Turn ignition switch “OFF”.
2. Disconnect corresponding heated oxygen sensor 1 harness connector.

SEC099D

SEC134D

䊳

GO TO 7.

CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal and HO2S1 terminal as follows.

Refer to Wiring Diagram.

MTBL1146

Continuity should exist.

3. Check harness continuity between ECM terminal or HO2S1 terminal and ground as follows.

Refer to Wiring Diagram.

MTBL1147

Continuity should not exist.

4. Also check harness for short to power.

OK or NG

䊳

GO TO 8.

䊳

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

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-236

CHECK HEATED OXYGEN SENSOR 1 HEATER

Check resistance between HO2S1 terminals as follows.

SEF310XA

CAUTION:

쐌

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.

쐌

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.

OK or NG

䊳

GO TO 9.

䊳

Replace malfunctioning heated oxygen sensor 1.

CHECK MASS AIR FLOW SENSOR

1. Reconnect harness connectors disconnected.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 62 (Mass air flow sensor signal) and ground.

SEC103D

4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it again.

Then repeat above check.

OK or NG

䊳

GO TO 10.

䊳

Replace mass air flow sensor.

IDX

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-237

CHECK PCV VALVE

1. Install all removed parts.
2. Start engine and let it idle.
3. Remove PCV valve from rocker cover.
4. Make sure that a hissing noise will be heard as air passes through it and a strong vacuum should be felt immediately

when a finger is placed over valve inlet.

SEC137A

OK or NG

OK (With CONSULT-II)

䊳

GO TO 11.

OK (Without CONSULT-
II)

䊳

GO TO 12.

䊳

Replace PCV valve.

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-238

CHECK HEATED OXYGEN SENSOR 1

With CONSULT-II

SEF967Y

6. Check the following.

쐌

“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 below.

SEF647Y

쐌

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

쐌

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

쐌

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

SEF648Y

CAUTION:

쐌

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.

쐌

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.

OK or NG

䊳

GO TO 13.

䊳

Replace malfunctioning heated oxygen sensor 1.

IDX

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-239

CHECK HEATED OXYGEN SENSOR 1

Without CONSULT-II

1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 91 (HO2S1 bank 1 signal) or 92 (HO2S1 bank 2 signal) and engine

ground.

3. Check the following with engine speed held at 2,000 rpm constant under no load.

SEC109D

CAUTION:

쐌

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.

쐌

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.

OK or NG

䊳

GO TO 13.

䊳

Replace malfunctioning heated oxygen sensor 1.

CHECK INTERMITTENT INCIDENT

Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-151.

䊳

INSPECTION END

DTC P0133, P0153 HO2S1

Diagnostic Procedure (Cont’d)

EC-240

Content .. 13 14 15 16 ..