Nissan Primera P11. Manual — part 252
Description
NCEC0180
SYSTEM DESCRIPTION
NCEC0180S01
Sensor
Input Signal to ECM
ECM func-
tion
Actuator
Camshaft position sensor
Engine speed
Heated oxy-
gen sensor
2 (rear)
heater con-
trol
Heated oxygen sensor 2 (rear)
heater
The ECM performs ON/OFF control of the heated oxygen sensor 2 (rear) heater corresponding to the engine
speed.
OPERATION
NCEC0180S02
Engine condition
Heated oxygen sensor 2 (rear) heater
Engine stopped
OFF
Engine is running below 3,600 rpm. [After driving for 2 minutes at a speed of 70 km/h
(43 MPH) or more]
ON
CONSULT-II Reference Value in Data Monitor
Mode
NCEC0181
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
HO2S2 HTR (B1)
I
Engine speed: Below 3,600 rpm [After driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more]
ON
I
Ignition switch ON (Engine stopped)
OFF
ECM Terminals and Reference Value
NCEC0182
Specification data are reference values and are measured between each terminal and 48 (ECM ground).
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
3
W/R
Heated oxygen sensor 2
(rear) heater
[Engine is running]
I
Below 3,600 rpm [After driving for 2 minutes at a
speed of 70 km/h (43 MPH) or more]
Approximately 0.7V
[Ignition switch “ON”]
I
Engine stopped
BATTERY VOLTAGE
(11 - 14V)
On Board Diagnosis Logic
NCEC0183
DTC No.
Malfunction is detected when ...
Check Items (Possible Cause)
P0141
0141
I
The current amperage in the heated oxygen sensor 2
(rear) heater circuit is out of the normal range.
(An improper voltage drop signal is sent to ECM through
the heated oxygen sensor 2 (rear) heater.)
I
Harness or connectors
(The heated oxygen sensor 2 (rear) heater cir-
cuit is open or shorted.)
I
Heated oxygen sensor 2 (rear) heater
DTC P0141 HEATED OXYGEN SENSOR 2 (REAR) HEATER
SR20DE
Description
EC-207
DTC Confirmation Procedure
NCEC0184
NOTE:
If “DTC Confirmation Procedure ” has been previously conducted,
always turn ignition switch “OFF” and wait at least 9 seconds
before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that bat-
tery voltage is in between 10.5V and 16V at idle.
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
with CONSULT-II.
2)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
3)
If 1st trip DTC is detected, go to “Diagnostic Procedure”, EC-
SR-210.
With GST
1)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2)
Turn ignition switch “OFF” and wait at least 9 seconds.
3)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
4)
Select “MODE 3” with GST.
5)
If DTC is detected, go to “Diagnostic Procedure”, EC-SR-210.
When using GST, “DTC Confirmation Procedure ” should be
performed twice as much as when using CONSULT-II or ECM
(Diagnostic Test Mode II) because GST cannot display MODE
7 (1st trip DTC) concerning this diagnosis. Therefore, using
CONSULT-II
or
ECM
(Diagnostic
Test
Mode
II)
is
recommended.
NEF103A
DTC P0141 HEATED OXYGEN SENSOR 2 (REAR) HEATER
SR20DE
DTC Confirmation Procedure
EC-208
Wiring Diagram
NCEC0185
YEC087A
DTC P0141 HEATED OXYGEN SENSOR 2 (REAR) HEATER
SR20DE
Wiring Diagram
EC-209
Diagnostic Procedure
NCEC0186
1
CHECK POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 (rear) harness connector.
SEF209X
3. Turn ignition switch “ON”.
4. Check voltage between terminal 4 and ground.
SEF047X
Voltage: Battery voltage
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 2.
2
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M50, F104 (M81, F115 for CVT models)
I
Harness for open or short between heated oxygen sensor 2 (rear) and fuse
©
Repair harness or connectors.
3
CHECK GROUND CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between heated oxygen sensor 2 (rear) harness connector terminal 1 and ECM terminal 3.
Refer to wiring diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the harness for open or short between heated oxygen sensor 2 (rear) heater and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
Heated oxygen sensor 2
(rear) harness connector
Heated oxygen
sensor 2 (rear)
Front exhaust
tube
DTC P0141 HEATED OXYGEN SENSOR 2 (REAR) HEATER
SR20DE
Diagnostic Procedure
EC-210
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