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![INFINITI FX35 2004 Service Manual EC-436
[VQ35DE]
DTC P1143, P1163 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select INFINITI FX35 2004 Service Manual EC-436
[VQ35DE]
DTC P1143, P1163 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select](/manual-img/42/57021/w960_57021-1776.png)
EC-436
[VQ35DE]
DTC P1143, P1163 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. 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”.
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0174 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 con-
nector.
5. Make sure DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-67, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION" .
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0171 or P0174 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0171 or P0174. Refer to EC-256 .
No >> GO TO 4.
4. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-156, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace malfunctioning heated oxygen sensor 1.
5. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-437, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 1.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For circuit, refer to EC-207, "
Wiring Diagram" .
>>INSPECTION END
SEF968Y
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EC-437
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Revision: 2004 November 2004 FX35/FX45
Component InspectionABS006U4
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm i INFINITI FX35 2004 Service Manual DTC P1143, P1163 HO2S1
EC-437
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Component InspectionABS006U4
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm i](/manual-img/42/57021/w960_57021-1777.png)
DTC P1143, P1163 HO2S1
EC-437
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Component InspectionABS006U4
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.
6. Check the following.
“HO2S1 MNTR (B1)/(B2)” in “DATA MONITOR” mode
changes from “RICH” to “LEAN” to “RICH” 5 times in 10 sec-
onds.
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
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1 (B1) signal] or 16 [HO2S1 (B2) signal] and
ground.
SEF646Y
SEF647Y
SEF648Y
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EC-438
[VQ35DE]
DTC P1143, P1163 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. 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 InstallationABS006U5
HEATED OXYGEN SENSOR 1
Refer to EM-26, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .
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DTC P1144, P1164 HO2S1PFP:22690
Component DescriptionABS006U6
The heated oxygen sensor 1 is plac INFINITI FX35 2004 Service Manual DTC P1144, P1164 HO2S1
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Component DescriptionABS006U6
The heated oxygen sensor 1 is plac](/manual-img/42/57021/w960_57021-1779.png)
DTC P1144, P1164 HO2S1
EC-439
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DTC P1144, P1164 HO2S1PFP:22690
Component DescriptionABS006U6
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 1 to 0V.
CONSULT-II Reference Value in Data Monitor ModeABS006U7
Specification data are reference values.
On Board Diagnosis LogicABS006U8
To judge the malfunction, the output from the heated oxygen sensor
1 is monitored to determine whether the rich output is sufficiently
high and lean output is sufficiently low. When both the outputs are
shifting to the rich side, the malfunction will be detected.
SEF463R
SEF288D
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 (B1)
HO2S1 (B2)
Engine: After warming up Maintaining engine speed at 2,000 rpm0 - 0.3V ←→ Approx. 0.6 -
1.0V
HO2S1 MNTR (B1)
HO2S1 MNTR (B2)LEAN ←→ RICH
Changes more than 5 times
during 10 seconds.
SEF299U
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1144
11 4 4
(Bank 1)
Heated oxygen sensor
1 rich shift monitoringThe maximum and minimum voltages from the
sensor are beyond the specified voltages.
Heated oxygen sensor 1
Heated oxygen sensor 1 heater
Fuel pressure
Injector P1164
11 6 4
(Bank 2)
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![INFINITI FX35 2004 Service Manual EC-440
[VQ35DE]
DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006U9
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has INFINITI FX35 2004 Service Manual EC-440
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DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006U9
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If DTC Confirmation Procedure has](/manual-img/42/57021/w960_57021-1780.png)
EC-440
[VQ35DE]
DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
DTC Confirmation ProcedureABS006U9
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:
Always perform at a temperature above −10°C (14°F).
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
WITH CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine and wait at least 5 seconds.
3. Turn ignition switch ON and select “HO2S1 (B1) P1144” or “HO2S1 (B2) P1164” of “HO2S1” in “DTC
WORK SUPPORT” mode with CONSULT-II.
4. Touch “START”.
5. 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 con-
tinuously until “TESTING” changes to “COMPLETED”. (It will
take approximately 40 seconds or more.)
If “TESTING” is not displayed after 5 minutes, retry from
step 2.
7. Make sure that “OK” is displayed after touching “SELF-DIAG
RESULTS”. If “NG” is displayed, refer to EC-441, "
Diagnostic
Procedure" .
PBIB0548E
ENG SPEED 1,000 - 3,100 rpm
Vehicle speed Less than 100 km/h (62 MPH)
B/FUEL SCHDL 2.0 - 17.0 msec
Selector lever Suitable position
PBIB0549E
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Overall Function CheckABS006UA
Use this procedure to check the overall function of the heated ox INFINITI FX35 2004 Service Manual DTC P1144, P1164 HO2S1
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Overall Function CheckABS006UA
Use this procedure to check the overall function of the heated ox](/manual-img/42/57021/w960_57021-1781.png)
DTC P1144, P1164 HO2S1
EC-441
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Overall Function CheckABS006UA
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
1. Start engine and warm it up to normal operating temperature.
2. Set voltmeter probes between ECM terminal 35 [HO2S1(B1) signal] 16 [HO2S1(B2) signal] and ground.
3. Check one of the following with engine speed held at 2,000 rpm
constant under no load.
–The maximum voltage is below 0.8V at least 1 time.
–The minimum voltage is below 0.35V at least 1 time.
4. If NG, go to EC-441, "
Diagnostic Procedure" .
Diagnostic ProcedureABS006UB
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body. Refer to EC-141, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2. RETIGHTEN HEATED OXYGEN SENSOR 1
Loosen and retighten heated oxygen sensor 1.
>> GO TO 3.
PBIB1107E
PBIB2195E
Tightening torque: 45 N·m (4.6 kg-m, 33 ft-lb)
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![INFINITI FX35 2004 Service Manual EC-442
[VQ35DE]
DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select INFINITI FX35 2004 Service Manual EC-442
[VQ35DE]
DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. CLEAR THE SELF-LEARNING DATA
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select](/manual-img/42/57021/w960_57021-1782.png)
EC-442
[VQ35DE]
DTC P1144, P1164 HO2S1
Revision: 2004 November 2004 FX35/FX45
3. 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”.
4. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0172 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 con-
nector.
5. Make sure DTC P0102 is displayed.
6. Erase the DTC memory. Refer to EC-67, "
HOW TO ERASE
EMISSION-RELATED DIAGNOSTIC INFORMATION" .
7. Make sure DTC P0000 is displayed.
8. Run engine for at least 10 minutes at idle speed.
Is the 1st trip DTC P0172 or P0175 detected?
Is it difficult to start engine?
Ye s o r N o
Yes >> Perform trouble diagnosis for DTC P0172 or P0175. Refer to EC-265 .
No >> GO TO 4.
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4. CHECK HO2S1 CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sens INFINITI FX35 2004 Service Manual DTC P1144, P1164 HO2S1
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4. CHECK HO2S1 CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sens](/manual-img/42/57021/w960_57021-1783.png)
DTC P1144, P1164 HO2S1
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4. CHECK HO2S1 CONNECTOR FOR WATER
1. Turn ignition switch OFF.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Check connectors for water.
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness or connectors.
5. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-156, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace malfunctioning heated oxygen sensor 1.
6. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-443, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace malfunctioning heated oxygen sensor 1.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-135, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
For circuit, refer to EC-207, "
Wiring Diagram" .
>>INSPECTION END
Component InspectionABS006UC
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)” and “HO2S1 MNTR (B1)”.
4. Hold engine speed at 2,000 rpm under no load during the following steps.Water should not exist.
PBIB1559E