Nissan Almera Tino V10. Manual — part 498
EC-818
[QG (WITHOUT EURO-OBD)]
HO2S1 HEATER (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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
EBS00R1G
1.
CHECK OVERALL FUNCTION CHECK
1.
Start engine and warm it up to normal operating temperature.
2.
Turn ignition switch “OFF” and wait at least 10 seconds.
3.
Turn ignition switch “ON”.
4.
Set the tester probe between ECM terminal 24 (HO2S1 heater signal) and ground.
5.
Start engine and let it idle.
6.
Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal wave as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 2.
TER-
MINA
L NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
24
G
Heated oxygen sensor 1
heater
[Engine is running]
●
Warm-up condition.
●
Engine speed is below 3,600 rpm.
Approximately 7.0V
[Ignition switch “ON”]
●
Engine stopped.
[Engine is running]
●
Engine speed is above 3,600 rpm.
BATTERY VOLTAGE
(11 - 14V)
PBIB0519E
Conditions
Voltage
At idle
Approximately 7.0V
Engine speed is above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
MBIB0038E
PBIB0519E
HO2S1 HEATER (M/T MODELS)
EC-819
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK HO2S1 POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect heated oxygen sensor 1 harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between HO2S1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M71, F45
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch “OFF”.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 24 and HO2S1 terminal 1.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to
EC-820, "Component Inspection"
.
OK or NG
OK
>> GO TO 6.
NG
>> Replace heated oxygen sensor 1.
MBIB0091E
Voltage: Battery voltage
PBIB0541E
Continuity should exist.
EC-820
[QG (WITHOUT EURO-OBD)]
HO2S1 HEATER (M/T MODELS)
6.
CHECK INTERMITTENT INCIDENT
Refer to
EC-644, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00R1H
HEATED OXYGEN SENSOR 1 HEATER
1.
Check resistance between HO2S1 terminals as follows.
2.
If NG, replace heated oxygen sensor 1.
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 sur-
face 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
EBS00R1I
HEATED OXYGEN SENSOR 1
Refer to
EM-21, "EXHAUST MANIFOLD AND CATALYTIC CONVERTER"
.
Terminal No.
Resistance
1 and 4
8 - 10
Ω
at 25
°
C (77
°
F)
2 and 3, 4
∞ Ω
(Continuity should not exist)
3 and 1, 2, 4
PBIB0542E
HO2S1 HEATER (A/T MODELS)
EC-821
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
HO2S1 HEATER (A/T MODELS)
PFP:22690
Description
EBS00R1J
SYSTEM DESCRIPTION
The ECM performs ON/OFF duty 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 Mode
EBS00R1K
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 control
Heated oxygen sensor 1
heater
Engine coolant temperature sensor
Engine coolant temperature
Engine speed rpm
Heated oxygen sensor 1 heater
Above 3,200
OFF
Below 3,200 after warming up
ON
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S1 HTR (B1)
HO2S1 HTR (B2)
●
Engine: After warming up
●
Engine speed: Below 3,200 rpm
ON
●
Engine speed: Above 3,200 rpm
OFF
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