Nissan X-Trail 32. Manual — part 889
P0420 THREE WAY CATALYST FUNCTION
EC-685
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
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10. Fix ignition coil using a rope etc. with gap of 13 - 17 mm (0.52 -
0.66 in) between the edge of the spark plug and grounded metal
portion as shown in the figure.
11. Crank engine for about 3 seconds, and check whether spark is
generated between the spark plug and the grounded metal por-
tion.
CAUTION:
• Do not approach to the spark plug and the ignition coil
within 50 cm (19.7 in). Be careful not to get an electrical
shock while checking, because the electrical discharge
voltage becomes 20 kV or more.
• It might cause to damage the ignition coil if the gap of more than 17 mm (0.66 in) is taken.
NOTE:
When the gap is less than 13 mm (0.52 in), the spark might be generated even if the coil is mal-
functioning.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> GO TO 7.
7.
CHECK FUNCTION OF IGNITION COIL-2
1.
Turn ignition switch OFF.
2.
Disconnect spark plug and connect a known-good spark plug.
3.
Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded metal portion.
Is the inspection result normal?
YES
>> GO TO 8.
NO
>> Check ignition coil, power transistor and their circuits. Refer to
.
8.
CHECK SPARK PLUG
Check the initial spark plug for fouling, etc. Refer to
Is the inspection result normal?
YES
>> Replace spark plug(s) with standard type one(s). For
spark plug type, refer to
.
NO
>> Repair or clean spark plug. Refer to
. Then GO TO 9
9.
CHECK FUNCTION OF IGNITION COIL-3
1.
Reconnect the initial spark plugs.
2.
Crank engine for about 3 seconds, and recheck whether spark is generated between the spark plug and
the grounded portion.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace spark plug(s) with standard type one(s). For spark plug type, refer to
.
10.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
Spark should be generated.
JMBIA0066GB
Spark should be generated.
SEF156I
Spark should be generated.
EC-686
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0420 THREE WAY CATALYST FUNCTION
2.
Remove fuel injector assembly.
Refer to
Keep fuel hose and all fuel injectors connected to fuel tube.
3.
Disconnect all ignition coil harness connectors.
4.
Reconnect all fuel injector harness connectors disconnected.
5.
Turn ignition switch ON.
Does fuel drip from fuel injector?
YES
>> GO TO 11.
NO
>> Replace the fuel injector(s) from which fuel is dripping. Refer to
.
11.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
Is the trouble fixed?
YES
>> INSPECTION END
NO
>> Replace three way catalyst assembly. Refer to
P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-687
< DTC/CIRCUIT DIAGNOSIS >
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P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
DTC Description
INFOID:0000000010986374
DTC DETECTION LOGIC
POSSIBLE CAUSE
• Harness or connectors (EVAP canister purge volume control solenoid valve circuit is open or shorted.)
• EVAP canister purge volume control solenoid valve
FAIL-SAFE
Not applicable
DTC CONFIRMATION PROCEDURE
1.
CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for at least 13 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000010986375
1.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect EVAP canister purge volume control solenoid valve harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between EVAP canister purge volume control solenoid valve harness connector and
ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
P0444
PURG VOLUME CONT/V
(Evaporative emission system purge con-
trol valve circuit open)
An excessively low voltage signal is sent to ECM through the EVAP canis-
ter purge volume control solenoid valve.
+
−
Voltage
EVAP canister purge volume
control solenoid valve
Connector
Terminal
F32
2
Ground
Battery voltage
EC-688
< DTC/CIRCUIT DIAGNOSIS >
[QR25DE]
P0444 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
1.
Turn ignition switch OFF.
2.
Disconnect IPDM E/R harness connector.
3.
Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
IPDM E/R harness connector.
4.
Also check harness for short to ground.
Is the inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
3.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between EVAP canister purge volume control solenoid valve harness connector and
ECM harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES-1 >> With CONSULT: GO TO 4.
YES-2 >> Without CONSULT: GO TO 5.
NO
>> Repair or replace error-detected parts.
4.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
With CONSULT
1.
Reconnect all harness connectors disconnected.
2.
Start engine.
3.
Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode of “ENGINE” using CONSULT.
4.
Check that engine speed varies according to the valve opening.
Does engine speed vary according to the valve opening?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
Check the EVAP canister purge volume control solenoid valve. Refer to
EC-689, "Component Inspection"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace EVAP canister purge volume control solenoid valve. Refer to
.
6.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
>> INSPECTION END
+
−
Continuity
EVAP canister purge volume
control solenoid valve
IPDM E/R
Connector
Terminal
Connector
Terminal
F32
2
F72
73
Existed
+
−
Continuity
EVAP canister purge volume
control solenoid valve
ECM
Connector
Terminal
Connector
Terminal
F32
1
F85
17
Existed
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