sensor INFINITI QX56 2011 Factory Service Manual

P0197, P0198 EOT SENSOREC-285
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P0197, P0198 EOT SENSOR
DTC LogicINFOID:0000000006217832
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and wait at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES >> Go to EC-285, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217833
1.CHECK ENGINE OIL TEMPERATURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect engine oil temperature (EOT) sensor harness connector.
2. Turn ignition switch ON.
3. Check the voltage between EOT sensor harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK EOT SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EOT sensor harness connector and ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC Detecting Condition Possible Cause
P0197 EOT SEN/CIRC
(Engine oil temperature
sensor circuit low input) An excessively low voltage from the sensor
is sent to ECM.
 Harness or connectors
(The engine oil temperature sensor circuit
is open or shorted.)
 Engine oil temperature sensor
P0198 EOT SEN/CIRC
(Engine oil temperature
sensor circuit high input) An excessively high voltage from the sensor
is sent to ECM.
EOT sensor
Ground Voltage (V)
Connector Terminal
F38 1 Ground Approx. 5
EOT sensor ECM Continuity
Connector Terminal Connector Terminal
F 3 8 2 F 111 4 0 E x i s t e d
Revision: 2010 May2011 QX56

EC-286
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P0197, P0198 EOT SENSOR
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK ENGINE OIL TEMPERATURE SENSOR
Refer to EC-286, "
Component Inspection (Engine Oil Temperature Sensor)".
Is the inspection result normal?
YES >> GO TO 4.
NO >> Replace engine oil temperature sensor. Refer to EM-54, "
Exploded View".
4.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (Engi ne Oil Temperature Sensor)INFOID:0000000006217834
1.CHECK ENGINE OIL TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect engine oil temperature sensor harness connector.
3. Remove engine oil temperature sensor.
4. Check resistance between engine oi l temperature sensor termi-
nals by heating with hot water as shown in the figure.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace engine oil temperature sensor. Refer to EM-54,
"Exploded View".
Terminals Condition Resistance (k Ω)
1 and 2 Temperature [ °C ( °F)] 20 (68) 2.35 - 2.73
50 (122) 0.68 - 1.00
90 (194) 0.236 - 0.260
JMBIA0080ZZ
Revision: 2010 May2011 QX56

EC-288
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P0222, P0223 TP SENSOR
P0222, P0223 TP SENSOR
DTC LogicINFOID:0000000006217837
DTC DETECTION LOGIC
NOTE:
If DTC P0222 or P0223 is displayed with DTC P
0643, perform the trouble diagnosis for DTC P0643.
Refer to EC-381, "
DTC Logic".
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
If DTC Confirmation Procedure has been previously conduc ted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confi rm that battery voltage is 8 V or more at idle.
>> GO TO 2.
2.PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for 1 second.
2. Check DTC.
Is DTC detected?
YES >> Go to EC-288, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217838
1.CHECK THROTTLE POSITION SE NSOR 1 POWER SUPPLY CIRCUIT-I
1. Disconnect electric throttle control actuator harness connector.
2. Turn ignition switch ON.
3. Check the voltage between electric throttle control actuator harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
2.CHECK THROTTLE POSITION SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between electric thro ttle control actuator and ECM harness connector.
DTC No.Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P0222 TP SEN 1/CIRC-B1
(Throttle position sensor 1
circuit low input) An excessively low voltage from the TP
sensor 1 is sent to ECM.
 Harness or connectors
(TP sensor 1 circuit is open or shorted.)
 Electric throttle control actuator (TP sensor 1)
P0223 TP SEN 1/CIRC-B1
(Throttle position sensor 1
circuit high input) An excessively high voltage from the TP
sensor 1 is sent to ECM.
Electric throttle control actuator
Ground Voltage (V)
Connector Terminal
F66 2 Ground Approx. 5
Revision: 2010 May2011 QX56

P0222, P0223 TP SENSOREC-289
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4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK THROTTLE POSI
TION SENSOR 1 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between electric thro ttle control actuator and ECM harness connector.
2. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 4.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK THROTTLE POSITION SENSOR
Refer to EC-289, "
Component Inspection (Throttle Position Sensor)".
Is the inspection result normal?
YES >> GO TO 6.
NO >> GO TO 5.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Refer to EM-30, "
Removal and Installation".
>> INSPECTION END
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (T hrottle Position Sensor)INFOID:0000000006217839
1.CHECK THROTTLE POSITION SENSOR
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Perform EC-147, "
Work Procedure".
4. Turn ignition switch ON.
5. Set selector lever position to D.
6. Check the voltage between ECM harness connector terminals under the following conditions.
Electric throttle control actuator ECM Continuity
Connector Terminal Connector Terminal
F66 4 F110 97 Existed
Electric throttle control actuator ECM Continuity
Connector Terminal Connector Terminal
F66 1 F110 91 Existed
ECM Condition Voltage (V)
Connector +–
Terminal Terminal
F110 91
(TP sensor 1 signal) 97
(Sensor ground) Accelerator pedal Fully released More than 0.36
Fully depressed Less than 4.75
79
(TP sensor 2 signal) Fully released Less than 4.75
Fully depressed More than 0.36
Revision: 2010 May2011 QX56

EC-290
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P0222, P0223 TP SENSOR
Is the inspection result normal?
YES >> INSPECTION END
NO >> GO TO 2.
2.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Refer to EM-30, "
Removal and Installation".
>> INSPECTION END
Revision: 2010 May2011 QX56

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-291
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P0300, P0301, P0302, P0303, P0304,
P0305, P0306, P0307, P0308 MIS-
FIRE
DTC LogicINFOID:0000000006217840
DTC DETECTION LOGIC
When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crank-
shaft position (CKP) sensor signal to vary, ECM can determine that a misfire is occurring.
The misfire detection logic consists of the following two conditions.
1. One Trip Detection Logic (Three Way Catalyst Damage) On the 1st trip that a misfire condition occurs that can damage the three way catalyst (TWC) due to over-
heating, the MIL will blink.
When a misfire condition occurs, the ECM monitors the CKP sensor signal every 200 engine revolutions
for a change.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will turn off.
If another misfire condition occurs that can damage the TWC on a second trip, the MIL will blink.
When the misfire condition decreases to a level t hat will not damage the TWC, the MIL will remain on.
If another misfire condition occurs that can damage the TWC, the MIL will begin to blink again.
2. Two Trip Detection Logic (Exhaust quality deterioration) For misfire conditions that will not damage the TWC (but will affect vehicle emissions), the MIL will only
light when the misfire is detected on a second trip. Du ring this condition, the ECM monitors the CKP sen-
sor signal every 1,000 engine revolutions.
A misfire malfunction can be detected in any one cylinder or in multiple cylinders.
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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.
Sensor Input signal to ECM ECM function
Crankshaft position sensor Engine speed On board diagnosis of misfire
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P0300 MULTI CYL MISFIRE
(Multiple cylinder misfires detected) Multiple cylinders misfire.
 Improper spark plug
 Insufficient compression
 Incorrect fuel pressure
 The fuel injector circuit is open or shorted
 Fuel injector
 Intake air leakage
 The ignition signal circuit is open or shorted
 Lack of fuel
 Signal plate
 A/F sensor 1
 Incorrect PCV hose connection
P0301
CYL 1 MISFIRE
(No.1 cylinder misfire detected)
No. 1 cylinder misfires.
P0302 CYL 2 MISFIRE
(No. 2 cylinder misfire detected) No. 2 cylinder misfires.
P0303 CYL 3 MISFIRE
(No. 3 cylinder misfire detected) No. 3 cylinder misfires.
P0304 CYL 4 MISFIRE
(No. 4 cylinder misfire detected)
No. 4 cylinder misfires.
P0305 CYL 5 MISFIRE
(No. 5 cylinder misfire detected) No. 5 cylinder misfires.
P0306 CYL 6 MISFIRE
(No. 6 cylinder misfire detected) No. 6 cylinder misfires.
P0307 CYL 7 MISFIRE
(No. 7 cylinder misfire detected)
No. 7 cylinder misfires.
P0308 CYL 8 MISFIRE
(No. 8 cylinder misfire detected) No. 8 cylinder misfires.
Revision: 2010 May2011 QX56

P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
EC-295
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YES >> Replace “fuel filter and fuel pump assembly”.
NO >> Repair or replace malfunctioning part.
12.CHECK IDLE SPEED A
ND IGNITION TIMING
Check idle speed and ignition timing.
For procedure, refer to EC-530, "
Inspection" and EC-531, "Inspection".
For specification, refer to EC-538, "
Idle Speed" and EC-538, "Ignition Timing".
Is the inspection result normal?
YES >> GO TO 13.
NO >> Follow the EC-139, "
Work Procedure".
13.CHECK AIR FUEL RATIO SENSOR 1 POWER SUPPLY CIRCUIT
1. Disconnect air fuel ratio (A /F) sensor 1 harness connector.
2. Turn ignition switch ON.
3. Check the voltage between A/F sensor 1 harness connector and ground.
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 INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
4. Check the continuity between A/F sensor 1 harness connector and ground, or ECM harness connector
and ground.
5. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 15.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
15.CHECK A/F SENSOR 1 GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between A/F sensor 1 harness connector and ECM harness connector.
DTCA/F sensor 1
Ground Voltage
Bank Connector Terminal
P0130 1 F67 4 Ground 3.0 V
P0150 2 F68 4
DTC A/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
P0130 1 F67 3 F11088
Existed
P0150 2 F68 3 78
DTC A/F sensor 1 ECM
Ground Continuity
Bank Connector Terminal Connector Terminal
P0130 1 F67 3 F11088
Ground Not existed
P0150 2 F68 3 78
Revision: 2010 May2011 QX56

EC-296
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P0300, P0301, P0302, P
0303, P0304, P0305, P0306, P0307, P0308 MISFIRE
4. Also check harness for short to power.
Is the inspection result normal?
YES >> GO TO 16.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
16.CHECK A/F SENSOR 1 HEATER
Refer to EC-182, "
Component Inspection (A/F Sensor 1 Heater)".
Is the inspection result normal?
YES >> GO TO 17.
NO >> Replace malfunctioning A/F sensor 1. Refer to EX-5, "
Exploded View".
17.CHECK MASS AIR FLOW SENSOR
WITH CONSULT-III
Check mass air flow sensor signal in “DATA MONITOR” mode with CONSULT-III.
For specification, refer to EC-538, "
Mass Air Flow Sensor".
WITH GST
Check mass air flow sensor signal in Service $01 with GST.
For specification, refer to EC-538, "
Mass Air Flow Sensor".
Is the measurement value within the specification?
YES >> GO TO 18.
NO >> Check connectors for rusted terminals or loose connections in the mass air flow sensor circuit or
ground. Refer to EC-201, "
Diagnosis Procedure".
18.CHECK SYMPTOM MATRIX CHART
Check items on the rough idle symptom in EC-524, "
Symptom Table".
Is the inspection result normal?
YES >> GO TO 19.
NO >> Repair or replace malfunctioning part.
19.ERASE THE 1ST TRIP DTC
Some tests may cause a 1st trip DTC to be set.
Erase the 1st trip DTC from the ECM memo ry after performing the tests. Refer to EC-63, "
CONSULT-III
Function" or EC-60, "On Board Diagnosis Function".
>> GO TO 20.
20.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
DTC A/F sensor 1 ECM
Continuity
Bank Connector Terminal Connector Terminal
P0130 1 F67 6 F11094
Existed
P0150 2 F68 6 74
Revision: 2010 May2011 QX56

P0327, P0328, P0332, P0333 KS
EC-297
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P0327, P0328, P0332, P0333 KS
DTC LogicINFOID:0000000006217842
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PRECONDITIONING
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, confi rm that battery voltage is 10 V or more 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 EC-297, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217843
1.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 sens or harness connector and ECM harness connector.
3. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detected condition Possible cause
P0327 KNOCK SEN/CIRC-B1
[Knock sensor (bank 1) circuit
low input] An excessively low voltage from the sensor
is sent to ECM.
 Harness or connectors(The knock sensor circuit is open or
shorted.)
 Knock sensor
P0328
KNOCK SEN/CIRC-B1
[Knock sensor (bank 1) circuit
high input] An excessively high voltage from the sensor
is sent to ECM.
P0332 KNOCK SEN/CIRC-B2
[Knock sensor (bank 2) circuit
low input] An excessively low voltage from the sensor
is sent to ECM.
P0333 KNOCK SEN/CIRC-B2
[Knock sensor (bank 2) circuit
high input] An excessively high voltage from the sensor
is sent to ECM.
DTC
Knock sensor ECM
Continuity
Bank Connector Terminal Connector Terminal
P0327, P0328 1 F203 2 F111 35 Existed
P0332, P0333 2 F204 2
Revision: 2010 May2011 QX56

EC-298
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0327, P0328,
P0332, P0333 KS
 Harness for open or short between knock sensor and ECM
 Loose or poor connection for each connector and harness
>> Repair open circuit or short to power in harness or connectors.
3.CHECK KNOCK SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check the continuity between knock sens or 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 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
 Harness for open or short between ECM and knock sensor
 Loose or poor connection for each connector and harness
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.CHECK KNOCK SENSOR
Refer to EC-298, "
Component Inspection (Knock Sensor)".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace malfunctioning knock sensor. Refer to EM-106, "
Exploded View".
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (Knock Sensor)INFOID:0000000006217844
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 MΩ.
CAUTION:
Never use any knock sensors that have been dropp ed or physically damaged. Use only new ones.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Replace malfunctioning knock sensor. Refer to EM-106, "
Exploded View".
DTCKnock sensor ECM
Continuity
Bank Connector Terminal Connector Terminal
P0327, P0328 1 F203 1 F 11129
Existed
P0332, P0333 2 F204 1 33
Terminals Resistance
1 and 2 Approx. 532 - 588 k Ω [at 20 °C (68 °F)]
Revision: 2010 May2011 QX56