Nissan Primera P11. Instruction — part 251
Wiring Diagram
NCEC0177
YEC086A
DTC P0140 HEATED OXYGEN SENSOR 2
(REAR) (HIGH VOLTAGE)
SR20DE
Wiring Diagram
EC-203
Diagnostic Procedure
NCEC0178
1
RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
SEF202X
©
GO TO 2.
2
CHECK INPUT SIGNAL CIRCUIT
1. Disconnect heated oxygen sensor 2 (rear) harness connector and ECM harness connector.
SEF209X
2. Check harness continuity between ECM terminal 63 and heated oxygen sensor 2 (rear) harness connector terminal 2.
Refer to wiring diagram.
Continuity should exist.
3. Check harness continuity between ECM terminal 63 (or terminal 2) and ground.
Continuity should not exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING PART
Check the harness for open or short between heated oxygen sensor 2 (rear) and ECM.
©
Repair open circuit or short to ground or short to power in harness or connectors.
4
CHECK GROUND CIRCUIT
1. Check harness continuity between heated oxygen sensor 2 (rear) harness connector terminal 4 and engine ground.
Refer to wiring diagram.
Continuity should exist.
2. 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.
Intake manifold
collector
Engine
ground
Heated oxygen sensor 2
(rear) harness connector
Heated oxygen
sensor 2 (rear)
Front exhaust tube
DTC P0140 HEATED OXYGEN SENSOR 2
(REAR) (HIGH VOLTAGE)
SR20DE
Diagnostic Procedure
EC-204
Component Inspection
NCEC0179
REAR HEATED OXYGEN SENSOR
NCEC0179S01
With CONSULT-II
1)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2)
Stop vehicle with engine running.
3)
Select “FUEL INJECTION” in “ACTIVE TEST” mode, and
select “HO2S2 (B1)” as the monitor item with CONSULT-II.
4)
Check “HO2S2 (B1)” at idle speed when adjusting “FUEL
INJECTION” to ±25%.
“HO2S2 (B1)” should be above 0.48V at least once when
the “FUEL INJECTION” is +25%.
“HO2S2 (B1)” should be below 0.43V 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.
5
CHECK HARNESS CONNECTOR
Check heated oxygen sensor 2 (rear) harness connector for water.
Water should not exist.
OK or NG
OK
©
GO TO 6.
NG
©
Repair or replace harness connector.
6
CHECK HEATED OXYGEN SENSOR 2 (REAR)
Refer to “Component Inspection”, EC-SR-205.
OK or NG
OK
©
GO TO 7.
NG
©
Replace heated oxygen sensor 2 (rear).
7
CHECK INTERMITTENT INCIDENT
Perform “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-SR-114.
©
INSPECTION END
SEF662Y
SEF989R
(Reference data)
The voltage should be above
0.48V at least one time.
The voltage should be below
0.43V at least one time.
x0.01V
DTC P0140 HEATED OXYGEN SENSOR 2
(REAR) (HIGH VOLTAGE)
SR20DE
Component Inspection
EC-205
Without CONSULT-II
1)
Start engine and drive vehicle at a speed of more than 70 km/h
(43 MPH) for 2 consecutive minutes.
2)
Stop vehicle with engine running.
3)
Set voltmeter probes between ECM terminals 63 (Heated oxy-
gen sensor 2 (rear) signal) and engine ground.
4)
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 0.48V at least once.
If the voltage is above 0.48V at step 4, step 5 is not nec-
essary.
5)
Check the voltage when revving up to 6,000 rpm under no
load. Or keep vehicle at idling for 10 minutes, then check the
voltage. Or check the voltage when coasting from 80 km/h (50
MPH) in 3rd gear position (M/T), D position with “SPORTS
MODE SW” OFF or without “MANUAL MODE” (CVT).
The voltage should be below 0.43V at least once.
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.
SEF032X
DTC P0140 HEATED OXYGEN SENSOR 2
(REAR) (HIGH VOLTAGE)
SR20DE
Component Inspection (Cont’d)
EC-206
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