Nissan Qashqai J11. Manual — part 557
EC9-384
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P2681 ENGINE COOLANT BYPASS VALVE
NO
>> Replace engine coolant bypass valve.
P2A06 A/F SENSOR
EC9-385
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
E
F
G
H
I
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K
L
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A
EC9
N
P
O
P2A06 A/F SENSOR
DTC Logic
INFOID:0000000010309408
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DIAGNOSIS PROCEDURE
NOTE:
DTC P2A06 can not duplicate.
>> Proceed to
EC9-385, "Diagnosis Procedure"
.
Diagnosis Procedure
INFOID:0000000010309409
1.
CHECK ECM HARNESS CONNECTOR CONNECTIONS
1.
Turn ignition switch OFF.
2.
Check ECM harness connector connection.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK AIR FUEL RATIO (A/F) SENSOR HARNESS CONNECTOR CONNECTIONS
Check A/F sensor harness connector connection.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace error-detected parts.
3.
CHECK A/F SENSOR CIRCUIT FOR OPEN AND SHORT
Check A/F sensor circuit for open and short.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK INTERMITTENT INCIDENT
Perform
GI-41, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P2A06
PROPOR RICH SEN CIRC
(O2 sensor negative voltage bank 1
sensor 1)
• CO: OPEN CIRCUIT
ECM detects air fuel ratio (A/F) sensor
ground circuit is open circuit.
• Harness or connectors
(A/F sensor circuit is open.)
• A/F sensor
+
-
Continuity
ECM
A/F sensor
Connector
Terminal
Connector
Terminal
F83
89
F75
3
Existed
115
6
116
2
119
1
EC9-386
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
P2A06 A/F SENSOR
5.
REPLACE A/F SENSOR
Replace A/F sensor.
CAUTION:
• Discard any A/F 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 A/F sensor, clean exhaust system threads using Heated Oxygen Sensor
Thread Cleaner tool and approved anti-seize lubricant.
>> INSPECTION END
LOW PRESSURE FUEL PUMP
EC9-387
< DTC/CIRCUIT DIAGNOSIS >
[R9M]
C
D
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F
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EC9
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P
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LOW PRESSURE FUEL PUMP
Component Function Check
INFOID:0000000010500944
1.
CHECK FUEL PUMP FUNCTION
1.
Turn ignition switch ON.
2.
Pinch fuel feed hose with two fingers.
NOTE:
Fuel pressure pulsation should be felt on the fuel feed hose for 1 second after ignition switch is turned ON.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>>
EC9-387, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000010500945
1.
CHECK FPCM POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect FPCM harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between FPCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Perform the trouble diagnosis for power supply circuit. Refer to
EC9-163, "ECM : Diagnosis Pro-
2.
CHECK FPCM GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Check the continuity between FPCM harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to power in harness or connectors.
3.
CHECK FPCM INPUT AND OUTPUT CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check the continuity between FPCM harness connector and ECM harness connector.
3.
Also check harness for short to ground and to power.
+
−
Voltage
FPCM
Connector
Terminal
B75
8
Ground
Battery voltage
+
−
Continuity
FPCM
Connector
Terminal
B76
7
Ground
Existed
+
−
Continuity
FPCM
ECM
Connector
Terminal
Connector
Terminal
B77
9
E58
13
Existed
10
11
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