Nissan Juke (2014 year). Service Repair Manual — part 99
EC-326
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0300, P0301, P0302, P0303, P0304 MISFIRE
13.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect A/F sensor 1 harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
5.
Check the continuity between A/F sensor 1 harness connector or ECM harness connector and ground.
6.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 14.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
14.
CHECK A/F SENSOR 1 HEATER
Check the A/F sensor 1 heater. Refer to
EC-187, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace A/F sensor 1. Refer to
15.
CHECK MASS AIR FLOW SENSOR
With CONSULT
Check “MASS AIRFLOW” in “DATA MONITOR” mode of “ENGINE” using CONSULT.
With GST
Check mass air flow sensor signal in Service $01 with GST.
Is the measurement value within the specification?
YES
>> GO TO 16.
NO
>> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to
.
16.
CHECK SYMPTOM TABLE
Check items on the rough idle symptom in
.
Is the inspection result normal?
+
−
Continuity
A/F sensor 1
ECM
Connector
Terminal
Connector
Terminal
F70
1
F25
21
Existed
+
−
Continuity
A/F sensor 1
Connector
Terminal
F70
1
Ground
Not existed
+
−
Continuity
ECM
Connector
Terminal
F25
21
Ground
Not existed
1.0 - 4.0 g/s
: at idling
2.0 - 10.0 g/s
: at 2,500 rpm
1.0 - 4.0 g/s
: at idling
2.0 - 10.0 g/s
: at 2,500 rpm
Revision: 2013 October
2014 JUKE
P0300, P0301, P0302, P0303, P0304 MISFIRE
EC-327
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
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YES
>> GO TO 17.
NO
>> Repair or replace error-detected parts.
17.
ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memory after performing the tests. Refer to
.
>> GO TO 18.
18.
CHECK INTERMITTENT INCIDENT
GI-46, "Intermittent Incident"
.
>> INSPECTION END
Revision: 2013 October
2014 JUKE
EC-328
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0327, P0328 KS
P0327, P0328 KS
DTC Logic
INFOID:0000000009753290
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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 that battery voltage is more than 10 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and run it for at least 5 seconds at idle speed.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009753291
1.
CHECK KNOCK SENSOR GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect knock sensor harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between knock sensor harness connector and ECM harness connector.
5.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT
1.
Check the continuity between knock sensor harness connector and ECM harness connector.
DTC No.
Trouble diagnosis name
(Trouble diagnosis con-
tent)
DTC detected condition
Possible cause
P0327
KNOCK SEN/CIRC-B1
(Knock sensor circuit low
input)
An excessively low voltage from the knock sen-
sor is sent to ECM.
• Harness or connectors
(Knock sensor circuit is open or short-
ed.)
• Knock sensor
P0328
KNOCK SEN/CIRC-B1
(Knock sensor circuit high
input)
An excessively high voltage from the knock
sensor is sent to ECM.
+
−
Continuity
Knock sensor
ECM
Connector
Terminal
Connector
Terminal
F12
2
F25
35
Existed
Revision: 2013 October
2014 JUKE
P0327, P0328 KS
EC-329
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
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2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit or short to ground or short to power in harness or connectors.
3.
CHECK KNOCK SENSOR
Check the knock sensor. Refer to
EC-329, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-46, "Intermittent Incident"
.
NO
>> Replace knock sensor. Refer to
Component Inspection
INFOID:0000000009753292
1.
CHECK KNOCK SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect knock sensor harness connector.
3.
Check resistance between knock sensor terminals as per the following.
NOTE:
It is necessary to use an ohmmeter which can measure more than 10 M
Ω
.
CAUTION:
Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace knock sensor. Refer to
+
−
Continuity
Knock sensor
ECM
Connector
Terminal
Connector
Terminal
F12
1
F25
36
Existed
Knock sensor
Resistance
+
-
Terminals
1
2
Approx. 532 - 588 k
Ω
[at 20
°
C (68
°
F)]
Revision: 2013 October
2014 JUKE
EC-330
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0335 CKP SENSOR (POS)
P0335 CKP SENSOR (POS)
DTC Logic
INFOID:0000000009753293
DTC DETECTION LOGIC
NOTE:
If DTC P0340 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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 that battery voltage is more than 10.5 V with igni-
tion switch ON.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009753294
1.
CHECK CRANKSHAFT POSITION (CKP) SENSOR (POS) POWER SUPPLY
1.
Disconnect crankshaft position (CKP) sensor (POS) harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between CKP sensor (POS) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P0335
CKP SEN/CIRCUIT
[Crankshaft position sensor
(POS) circuit]
• The crankshaft position sensor (POS) signal
is not detected by the ECM during the first
few seconds of engine cranking.
• The proper pulse signal from the crankshaft
position sensor (POS) is not sent to ECM
while the engine is running.
• The crankshaft position sensor (POS) signal
is not in the normal pattern during engine run-
ning.
• Harness or connectors
[Crankshaft position sensor (POS) cir-
cuit is open or shorted.]
• Crankshaft position sensor (POS)
• Signal plate
+
−
Voltage
(Approx.)
CKP sensor (POS)
Connector
Terminal
F107
3
Ground
5 V
Revision: 2013 October
2014 JUKE
P0335 CKP SENSOR (POS)
EC-331
< DTC/CIRCUIT DIAGNOSIS >
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2.
CHECK CKP SENSOR (POS) POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF
2.
Disconnect ECM harness connector.
3.
Check the continuity between CKP sensor (POS) harness connector and ECM 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 CKP SENSOR (POS) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.
4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace error-detected parts.
4.
CHECK CKP SENSOR (POS) INPUT SIGNAL CIRCUIT
1.
Check the continuity between CKP sensor (POS) harness connector and ECM harness connector.
2.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK CRANKSHAFT POSITION SENSOR (POS)
Check the crankshaft position sensor (POS). Refer to
EC-332, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Replace crankshaft position sensor (POS). Refer to
.
6.
CHECK GEAR TOOTH
1.
Remove crankshaft position sensor (POS). Refer to
+
−
Continuity
CKP sensor (POS)
ECM
Connector
Terminal
Connector
Terminal
F107
3
F26
58
Existed
+
−
Continuity
CKP sensor (POS)
ECM
Connector
Terminal
Connector
Terminal
F107
2
F26
60
Existed
+
−
Continuity
CKP sensor (POS)
ECM
Connector
Terminal
Connector
Terminal
F107
1
F26
64
Existed
Revision: 2013 October
2014 JUKE
EC-332
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0335 CKP SENSOR (POS)
2.
Look into the mounting hole (A) of the crankshaft position sensor
(POS) to check that there is no missing gear tooth in the signal
plate (1).
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-46, "Intermittent Incident"
.
NO
>> Replace the signal plate. Refer to
Component Inspection
INFOID:0000000009753295
1.
CHECK CRANKSHAFT POSITION SENSOR (POS)-I
1.
Turn ignition switch OFF.
2.
Loosen the fixing bolt of the sensor.
3.
Disconnect crankshaft position sensor (POS) harness connector.
4.
Remove the sensor.
5.
Visually check the sensor for chipping.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace crankshaft position sensor (POS). Refer to
2.
CHECK CRANKSHAFT POSITION SENSOR (POS)-II
Check the resistance between crankshaft position sensor (POS) terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace crankshaft position sensor (POS). Refer to
.
JPBIA4623ZZ
PBIA9209J
Crankshaft position sensor (POS)
Resistance [at 25
°
C (77
°
F)]
+
−
Terminal (Polarity)
1
2
Except 0 or
∞
Ω
3
2
3
Revision: 2013 October
2014 JUKE
P0340 CMP SENSOR (PHASE)
EC-333
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
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P0340 CMP SENSOR (PHASE)
DTC Logic
INFOID:0000000009753296
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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 that battery voltage is more than 10.5 V with igni-
tion switch ON.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE-I
1.
Start engine and let it idle for at least 5 seconds.
If engine does not start, crank engine for at least 2 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-I
DTC No.
Trouble diagnosis name
(Trouble diagnosis con-
tent)
DTC detecting condition
Possible cause
P0340
CMP SEN/CIRC-B1
[Camshaft position sen-
sor (PHASE) circuit]
• The cylinder No. signal is not sent to ECM for
the first few seconds during engine cranking.
• The cylinder No. signal is not sent to ECM
during engine running.
• The cylinder No. signal is not in the normal
pattern during engine running.
• Harness or connectors
(Camshaft position sensor circuit is open
or shorted)
(Fuel rail pressure sensor circuit is open
or shorted.)
(Battery current sensor circuit is open or
shorted.)
(G sensor circuit is open or shorted.)
(Exhaust valve timing control position
sensor circuit is open or shorted.)
(Accelerator pedal position sensor 2 cir-
cuit is open or shorted.)
(Turbocharger boost sensor circuit is
open or shorted.)
(Engine oil pressure sensor circuit is
open or shorted.)
• Camshaft position sensor
• Camshaft (Intake)
• Starter motor
• Starting system circuit
• Dead (Weak) battery
• Fuel rail pressure sensor
• Battery current sensor
• G sensor
• Exhaust valve timing control position sen-
sor
• Accelerator pedal position sensor 2
• Turbocharger boost sensor
• Engine oil pressure sensor
Revision: 2013 October
2014 JUKE
EC-334
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0340 CMP SENSOR (PHASE)
1.
Maintaining engine speed at more than 800 rpm for at least 5 seconds.
2.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009753297
1.
CHECK STARTING SYSTEM
Turn ignition switch to START position.
Does the engine turn over? Does the starter motor operate?
YES
>> GO TO 2.
NO
>> Check starting system (Refer to
STR-27, "Work Flow (With GR8-1200 NI)"
. For the details of the GR8-1200 NI, refer to
.).
2.
CHECK CAMSHAFT POSITION (CMP) SENSOR (PHASE) POWER SUPPLY
1.
Turn ignition switch OFF.
2.
Disconnect camshaft position (CMP) sensor (PHASE) harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between CMP sensor (PHASE) harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
CHECK SENSOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness connector for short to power and short to ground, between the following terminals.
Is inspection result normal?
YES
>> Perform the trouble diagnosis for power supply circuit.
NO
>> Repair or replace error-detected parts.
4.
CHECK CMP SENSOR (PHASE) GROUND CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.
+
−
Voltage
(Approx.)
CMP sensor (PHASE)
Connector
Terminal
F109
1
Ground
5 V
ECM
Sensor
Connector
Terminal
Name
Connector
Terminal
F25
39
FRP sensor
F5
1
EOP sensor
F43
3
Turbocharger boost sensor
F75
1
F26
68
Battery current sensor
F52
1
G sensor
B32
3
72
CMP sensor
F109
1
EVT control position sensor
F110
1
E18
118
APP sensor 2
E101
5
Revision: 2013 October
2014 JUKE
P0340 CMP SENSOR (PHASE)
EC-335
< DTC/CIRCUIT DIAGNOSIS >
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4.
Also check harness for short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace error-detected parts.
5.
CHECK CMP SENSOR (PHASE) INPUT SIGNAL CIRCUIT
1.
Disconnect ECM harness connector.
2.
Check the continuity between CMP sensor (PHASE) harness connector and ECM harness connector.
3.
Also check harness for short to ground and to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Repair or replace error-detected parts.
6.
CHECK CAMSHAFT POSITION SENSOR (PHASE)
Check the camshaft position sensor (PHASE). Refer to
EC-335, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace camshaft position sensor (PHASE). Refer to
EM-86, "Removal and Installation"
.
7.
CHECK CAMSHAFT (INT)
Check the following.
• Accumulation of debris to the signal plate of camshaft rear end
• Chipping signal plate of camshaft rear end
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
NO
>> Remove debris and clean the signal plate of camshaft
rear end or replace camshaft. Refer to
.
Component Inspection
INFOID:0000000009753298
1.
CHECK CAMSHAFT POSITION SENSOR (PHASE)-I
1.
Turn ignition switch OFF.
2.
Loosen the fixing bolt of the sensor.
3.
Disconnect camshaft position sensor (PHASE) harness connector.
4.
Remove the sensor.
+
−
Continuity
CMP sensor (PHASE)
ECM
Connector
Terminal
Connector
Terminal
F109
2
F26
59
Existed
+
−
Continuity
CMP sensor (PHASE)
ECM
Connector
Terminal
Connector
Terminal
F109
3
F26
63
Existed
JSBIA0599ZZ
Revision: 2013 October
2014 JUKE
EC-336
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0340 CMP SENSOR (PHASE)
5.
Visually check the sensor for chipping.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Replace camshaft position sensor (PHASE).
2.
CHECK CAMSHAFT POSITION SENSOR (PHASE)-II
Check the resistance camshaft position sensor (PHASE) terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace camshaft position sensor (PHASE). Refer to
EM-86, "Removal and Installation"
.
PBIA9876J
Camshaft position sensor (PHASE)
Resistance [
Ω
at 25
°
C (77
°
F)]
+
−
Terminals (Polarity)
1
2
Except 0 or
∞
3
2
3
Revision: 2013 October
2014 JUKE
P0420 THREE WAY CATALYST FUNCTION
EC-337
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
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P0420 THREE WAY CATALYST FUNCTION
DTC Logic
INFOID:0000000009753299
DTC DETECTION LOGIC
The ECM monitors the switching frequency ratio of air fuel ratio (A/F)
sensor 1 and heated oxygen sensor 2.
A three way catalyst (manifold) with high oxygen storage capacity
will indicate a low switching frequency of heated oxygen sensor 2.
As oxygen storage capacity decreases, the heated oxygen sensor 2
switching frequency will increase.
When the frequency ratio of air fuel ratio (A/F) sensor 1 and heated
oxygen sensor 2 approaches a specified limit value, the three way
catalyst (manifold) malfunction is diagnosed.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
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.
Will CONSULT be used?
YES
>> GO TO 2.
NO
>> GO TO 6.
2.
PERFORM DTC CONFIRMATION PROCEDURE-I
With CONSULT
TESTING CONDITION:
Do not hold engine speed for more than the specified minutes below.
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Turn ignition switch ON.
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Start engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no load.
6.
Let engine idle for 1 minute.
7.
Select “DATA MONITOR” mode of “ENGINE” using CONSULT.
8.
Check that “COOLAN TEMP/S” indicates more than 70
°
C (158
°
F).
If not, warm up engine and go to next step when “COOLAN TEMP/S” indication reaches to 70
°
C (158
°
F).
9.
Open engine hood.
10. Select “DTC & SRT CONFIRMATION” then “SRT WORK SUPPORT” mode of “ENGINE” using CON-
SULT.
11. Rev engine up to 2,000 to 3,000 rpm and hold it for 3 consecutive minutes then release the accelerator
pedal completely.
SEF484YB
DTC No.
Trouble diagnosis name
(Trouble diagnosis con-
tent)
DTC detecting condition
Possible cause
P0420
TW CATALYST SYS-B1
(Catalyst system efficiency
below threshold)
• Three way catalyst (manifold) does not operate
properly.
• Three way catalyst (manifold) does not have
enough oxygen storage capacity.
• Three way catalyst (manifold)
• Exhaust tube
• Intake air leaks
• Fuel injector
• Fuel injector leaks
• Spark plug
• Improper ignition timing
Revision: 2013 October
2014 JUKE
EC-338
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0420 THREE WAY CATALYST FUNCTION
12. Check the indication of “CATALYST”.
Which is displayed on CONSULT screen?
CMPLT >> GO TO 5.
INCMP >> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE-II
1.
Wait 5 seconds at idle.
2.
Rev engine up to 2,000 to 3,000 rpm and maintain it until “INCMP” of “CATALYST” changes to “CMPLT” (It
will take approximately 5 minutes).
Does the indication change to “CMPLT”?
YES
>> GO TO 5.
NO
>> GO TO 4.
4.
PERFORM DTC CONFIRMATION PROCEDURE AGAIN
1.
Stop engine and cool it down to less than 70
°
C (158
°
F).
2.
Perform DTC confirmation procedure again.
>> GO TO 2.
5.
PERFORM DTC CONFIRMATION PROCEDURE-III
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
6.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-338, "Component Function Check"
NOTE:
Use component function check to check the overall function of the three way catalyst (manifold). During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
Component Function Check
INFOID:0000000009753300
1.
PERFORM COMPONENT FUNCTION CHECK
Without CONSULT
1.
Start engine and warm it up to the normal operating temperature.
2.
Turn ignition switch OFF and wait at least 10 seconds.
3.
Restart engine and keep the engine speed between 3,500 and 4,000 rpm for at least 1 minute under no
load.
4.
Let engine idle for 1 minute.
5.
Open engine hood.
6.
Check the voltage between ECM harness connector terminals as per the following condition.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Proceed to
.
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
F25
29
33
Keeping engine speed at 2500 rpm
constant under no load
The voltage fluctuation cycle takes more
than 5 seconds.
• 1 cycle: 0.6 - 1.0
→
0 - 0.3
→
0.6 - 1.0
Revision: 2013 October
2014 JUKE
P0420 THREE WAY CATALYST FUNCTION
EC-339
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
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Diagnosis Procedure
INFOID:0000000009753301
1.
CHECK EXHAUST SYSTEM
Visually check exhaust tubes and muffler for dent.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace error-detected parts.
2.
CHECK EXHAUST GAS LEAK
1.
Start engine and run it at idle.
2.
Listen for an exhaust gas leak before the three way catalyst (manifold).
Is exhaust gas leak detected?
YES
>> Repair or replace error-detected parts.
NO
>> GO TO 3.
3.
CHECK INTAKE AIR LEAK
Listen for an intake air leak after the mass air flow sensor.
Is intake air leak detected?
YES
>> Repair or replace error-detected parts.
NO
>> GO TO 4.
4.
CHECK IGNITION TIMING AND IDLE SPEED
Check the following items. Refer to
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Follow the
.
5.
CHECK FUEL INJECTOR
Check the fuel injector. Refer to
EC-512, "Component Function Check"
.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> Perform
.
6.
CHECK FUNCTION OF IGNITION COIL-I
CAUTION:
Do the following procedure in the place where ventilation is good without the combustible.
1.
Turn ignition switch OFF.
2.
Remove fuel pump fuse in IPDM E/R to release fuel pressure.
NOTE:
Do not use CONSULT to release fuel pressure, or fuel pressure applies again during the following proce-
dure.
3.
Start engine.
4.
After engine stalls, crank it two or three times to release all fuel pressure.
5.
Turn ignition switch OFF.
6.
Remove all ignition coil harness connectors to avoid the electrical discharge from the ignition coils.
7.
Remove ignition coil and spark plug of the cylinder to be checked.
PBIB1216E
Revision: 2013 October
2014 JUKE
EC-340
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
P0420 THREE WAY CATALYST FUNCTION
8.
Crank engine for 5 seconds or more to remove combustion gas in the cylinder.
9.
Connect spark plug and harness connector to ignition coil.
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-II
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-III
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
.
Spark should be generated.
JMBIA0066GB
Spark should be generated.
SEF156I
Spark should be generated.
Revision: 2013 October
2014 JUKE
P0420 THREE WAY CATALYST FUNCTION
EC-341
< DTC/CIRCUIT DIAGNOSIS >
[MR16DDT ]
C
D
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F
G
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K
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EC
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10.
CHECK FUEL INJECTOR
1.
Turn ignition switch OFF.
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-46, "Intermittent Incident"
.
Is the trouble fixed?
YES
>> INSPECTION END
NO
>> Replace three way catalyst assembly. Refer to
(AWD).
Revision: 2013 October
2014 JUKE
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