2003 NISSAN TEANA Service Manual

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Page 2001 of 3502

NISSAN TEANA 2003 Service Manual HO2S2
EC-719
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2. CHECK OVERALL FUNCTION - II
Keep engine at idle for 10 minutes, then check the voltage between ECM terminal 74 [HO2S2 (B1) signal] or
55 [HO2S2 (B2) si

Page 2002 of 3502

NISSAN TEANA 2003 Service Manual EC-720
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HO2S2

5. CHECK HO2S2 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S2 terminal as follows.
Refer to Wiring Diagram.
2. Check harness con

Page 2003 of 3502

NISSAN TEANA 2003 Service Manual HO2S2
EC-721
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6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7. Check “HO2S2 (B1)/(B2

HO2S2
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6. Select “FUEL INJECTION” in “ACTIVE TEST” mode, and select
“HO2S2 (B1)/(B2)” as the monitor item with CONSULT-II.
7. Check “HO2S2 (B1)/(B2)” at idle speed when adjusting “FUEL INJECTION” to ±25%.
“HO2S2 (B1)/(B2)” should be above 0.63V at least once when the “FUEL INJECTION” is +25%.
“HO2S2 (B1)/(B2)” should be below 0.48V 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 and approved anti-seize lubricant.
Without CONSULT-II
1. Start engine and warm it up to the normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
4. Let engine idle for 1 minute.
5. Set voltmeter probes between ECM terminal 74 [HO2S2 (B1) signal] or 55 [HO2S2 (B2) signal] and
ground.
6. 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 0.63V at least once during this
procedure.
If the voltage is above 0.63V at step 6, step 7 is not neces-
sary.
7. Keep vehicle at idling for 10 minutes, then check voltage. Or
check the voltage when coasting from 80 km/h (50 MPH) in “D”
position with “OD” OFF.
The voltage should be below 0.48V at least once during this
procedure.
8. 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 and approved anti-seize lubricant.
SEF662Y
PBIB0796E
PBIB1607E

Page 2004 of 3502

NISSAN TEANA 2003 Service Manual EC-722
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HO2S2

Removal and InstallationBBS0055Z
HEATED OXYGEN SENSOR 2
Refer to EM-140, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .

Page 2005 of 3502

NISSAN TEANA 2003 Service Manual HO2S2 HEATER
EC-723
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HO2S2 HEATERPFP:226A0
DescriptionBBS0055D
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 2 heater corresponding to

Page 2006 of 3502

NISSAN TEANA 2003 Service Manual EC-724
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HO2S2 HEATER

Wiring DiagramBBS0055F
BANK 1
TBWM1537E

Page 2007 of 3502

NISSAN TEANA 2003 Service Manual HO2S2 HEATER
EC-725
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring

Page 2008 of 3502

NISSAN TEANA 2003 Service Manual EC-726
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HO2S2 HEATER

BANK 2
TBWM1538E

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