Nissan Murano. Instruction — part 540
EC-270
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
For specification, refer to
.
Is the inspection result normal?
YES
>> GO TO 13.
NO
>> Follow the
EC-13, "BASIC INSPECTION : Special Repair Requirement"
13.
CHECK A/F SENSOR 1 INPUT SIGNAL CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect corresponding 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 and ground, 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, short to ground or short to power in harness or connectors.
14.
CHECK A/F SENSOR 1 HEATER
EC-160, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 15.
NO
>> Replace malfunctioning A/F sensor 1. Refer to
.
15.
CHECK MASS AIR FLOW SENSOR
With CONSULT
1.
Check “MASS AIR FLOW” in “DATA MONITOR” mode with CONSULT.
2.
For specification, refer to
EC-536, "Mass Air Flow Sensor"
With GST
1.
Check mass air flow sensor signal in Service $01 with GST.
2.
For specification, refer to
EC-536, "Mass Air Flow Sensor"
A/F sensor 1
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
1
F27
1
F8
45
Existed
2
49
2
F64
1
53
2
57
A/F sensor 1
Ground
Continuity
Bank
Connector
Terminal
1
F27
1
Ground
Not existed
2
2
F64
1
2
ECM
Ground
Continuity
Connector
Terminal
F8
45
Ground
Not existed
49
53
57
P0300, P0301, P0302, P0303, P0304, P0305, P0306 MISFIRE
EC-271
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
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?
YES
>> GO TO 17.
NO
>> Repair or replace malfunctioning part.
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-44, "Intermittent Incident"
.
>> INSPECTION END
EC-272
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P0327, P0328, P0332, P0333 KS
P0327, P0328, P0332, P0333 KS
Description
INFOID:0000000009720002
The knock sensor is attached to the cylinder block. It senses engine knocking using a piezoelectric element. A
knocking vibration from the cylinder block is sensed as vibrational pressure. This pressure is converted into a
voltage signal and sent to the ECM.
DTC Logic
INFOID:0000000009720003
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing 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
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009720004
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection E38. Refer to Ground Inspection in
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace ground connection.
2.
CHECK KNOCK SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Disconnect knock sensor harness connector and ECM harness connector.
2.
Check the continuity between knock sensor harness connector and ECM harness connector.
DTC No.
Trouble diagnosis
name
DTC detected condition
Possible cause
P0327
Knock sensor (bank 1)
circuit low input
An excessively low voltage from the sensor is
sent to ECM.
• Harness or connectors
(The sensor circuit is open or shorted.)
• Knock sensor
P0328
Knock sensor (bank 1)
circuit high input
An excessively high voltage from the sensor is
sent to ECM.
P0332
Knock sensor (bank 2)
circuit low input
An excessively low voltage from the sensor is
sent to ECM.
P0333
Knock sensor (bank 2)
circuit high input
An excessively high voltage from the sensor is
sent to ECM.
P0327, P0328, P0332, P0333 KS
EC-273
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 3.
3.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F200, F78
• Harness for open or short between knock sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between knock sensor harness connector and ECM harness connector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 6.
NO
>> GO TO 5.
5.
DETECT MALFUNCTIONING PART
Check the following.
• Harness connectors F200, F78
• Harness for open or short between knock sensor and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
6.
CHECK KNOCK SENSOR
EC-273, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> Replace malfunctioning knock sensor. Refer to
7.
CHECK INTERMITTENT INCIDENT
GI-44, "Intermittent Incident"
.
>> INSPECTION END
Component Inspection
INFOID:0000000009720005
1.
CHECK KNOCK SENSOR
1.
Turn ignition switch OFF.
2.
Disconnect knock sensor harness connector.
3.
Check resistance between knock sensor terminal as per the following.
NOTE:
DTC
Knock sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0327, P0328
1
F201
2
F8
67
Existed
P0332, P0333
2
F202
2
DTC
Knock sensor
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P0327, P0328
1
F201
1
F8
61
Existed
P0332, P0333
2
F202
1
62
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