Page 1985 of 3502
![NISSAN TEANA 2003 Service Manual HO2S1
EC-703
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
9. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Dia NISSAN TEANA 2003 Service Manual HO2S1
EC-703
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
9. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Dia](/manual-img/5/57392/w960_57392-1984.png)
HO2S1
EC-703
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
9. CHECK HO2S1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal and HO2S1 terminal as follows.
Refer to Wiring Diagram.
2. Check harness continuity between the following terminals and ground.
Refer to Wiring Diagram.
3. Also check harness for short to power.
OK or NG
OK >> GO TO 10.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
10. CHECK MASS AIR FLOW SENSOR
Refer to EC-472, "
Component Inspection" .
OK or NG
OK >> GO TO 11.
NG >> Replace mass air flow sensor.
11 . CHECK PCV VALVE
Refer to EC-370, "
Component Inspection" .
OK or NG
OK >> GO TO 12.
NG >> Replace PCV valve.
12. CHECK HEATED OXYGEN SENSOR 1
Refer to EC-704, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace malfunctioning heated oxygen sensor 1.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-450, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Te r m i n a l s
Bank
ECM Sensor
35 1 1
16 1 2
Continuity should exist.
Te r m i n a l s
Bank
ECM Sensor
35 1 1
16 1 2
Continuity should not exist.
Page 1986 of 3502
![NISSAN TEANA 2003 Service Manual EC-704
[VQ]
HO2S1
Component InspectionBBS0055S
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGE NISSAN TEANA 2003 Service Manual EC-704
[VQ]
HO2S1
Component InspectionBBS0055S
HEATED OXYGEN SENSOR 1
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select “MANU TRIG” and adjust “TRIGGE](/manual-img/5/57392/w960_57392-1985.png)
EC-704
[VQ]
HO2S1
Component InspectionBBS0055S
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” more than 5 times
in 10 seconds.
5 times (cycles) are counted as shown in the figure.
“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 and approved anti-seize lubricant.
SEF646Y
SEF647Y
SEF648Y
Page 1987 of 3502
![NISSAN TEANA 2003 Service Manual HO2S1
EC-705
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
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 NISSAN TEANA 2003 Service Manual HO2S1
EC-705
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
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](/manual-img/5/57392/w960_57392-1986.png)
HO2S1
EC-705
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
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.
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 → 0 -
0.3V
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.
Removal and InstallationBBS0055T
HEATED OXYGEN SENSOR 1
Refer to EM-140, "EXHAUST MANIFOLD AND THREE WAY CATALYST" .
PBIB1107E
Page 1988 of 3502
EC-706
[VQ]
HO2S1 HEATER
HO2S1 HEATERPFP:22690
DescriptionBBS00557
SYSTEM DESCRIPTION
The ECM performs ON/OFF control of the heated oxygen sensor 1 heater corresponding to the engine speed
and engine coolant temperature. The duty percent varies with engine coolant temperature when engine is
started.
OPERATION
CONSULT-II Reference Value in Data Monitor ModeBBS00558
Specification data are reference values.
Sensor Input signal to ECM ECM function Actuator
Camshaft position sensor (PHASE)
Crankshaft position sensor (POS)Engine speed
Heated oxygen sensor 1
heater controlHeated oxygen sensor 1
heater
Engine coolant temperature sensor Engine coolant temperature
Engine speed rpm Heated oxygen sensor 1 heater
Above 3,600OFF
Below 3,600 after warming up ON
MONITOR ITEM CONDITION SPECIFICATION
HO2S1 HTR (B1)
HO2S1 HTR (B2)
Engine: After warming up
Engine speed: Below 3,600 rpmON
Engine speed: Above 3,600 rpm OFF
Page 1989 of 3502
HO2S1 HEATER
EC-707
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramBBS00559
BANK 1
TBWM1535E
Page 1990 of 3502
EC-708
[VQ]
HO2S1 HEATER
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
2OHeated oxygen sensor 1
heater (Bank 1)[Engine is running]
Warm-up condition
Engine speed: Below 3,600 rpmApproximately 5V
[Engine is running]
Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
35 WHeated oxygen sensor 1
(Bank 1)[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 BSensor ground
(Heated oxygen sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
PBIB0519E
Page 1991 of 3502
HO2S1 HEATER
EC-709
[VQ]
C
D
E
F
G
H
I
J
K
L
MA
EC
BANK 2
TBWM1536E
Page 1992 of 3502
EC-710
[VQ]
HO2S1 HEATER
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
24 R/LHeated oxygen sensor 1
heater (Bank 2)[Engine is running]
Warm-up condition
Engine speed: Below 3,600 rpmApproximately 8V
[Engine is running]
Warm-up condition
Engine speed: Above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
16 WHeated oxygen sensor 1
(Bank 2)[Engine is running]
Warm-up condition
Engine speed: 2,000 rpm0 - Approximately 1.0V
(Periodically change)
78 BSensor ground
(Heated oxygen sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
PBIB0519E