2011 INFINITI QX56 Factory Service Manual

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Page 2345 of 5598

INFINITI QX56 2011 Factory Service Manual
P0443 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
EC-321
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
6. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PUR

Page 2346 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-322
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0444, P0445 EVAP CANISTER P
URGE VOLUME CONTROL SOLENOID
VALVE
P0444, P0445 EVAP CANISTER PURG E VOLUME CONTROL SOLENOID
VA LV E
DTC LogicINFOID:00000000062

EC-322
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0444, P0445 EVAP CANISTER P
URGE VOLUME CONTROL SOLENOID
VALVE
P0444, P0445 EVAP CANISTER PURG E VOLUME CONTROL SOLENOID
VA LV E
DTC LogicINFOID:0000000006217854
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, conf irm battery voltage is 11 V or more 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 >> Go to EC-322, "Diagnosis Procedure".
NO >> INSPECTION END
Diagnosis ProcedureINFOID:0000000006217855
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
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 vo lume control solenoid valve harness connector and
ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 2.
2.DETECT MALFUNCTIONING PART
Check the following.
Loose or poor connection for each connector and harness
Harness for open or short between EVAP canister purge volume control solenoid valve and IPDM E/R
DTC No. Trouble diagnosis name
(Trouble diagnosis content) DTC detecting condition Possible cause
P0444 PURG VOLUME CONT/V
(EVAP canister purge volume
control solenoid valve circuit
open) An excessively low voltage signal is
sent to ECM through the valve Harness or connectors
(The solenoid valve circuit is open or shorted.)
EVAP canister purge volume control solenoid valve
P0445 PURG VOLUME CONT/V
(EVAP canister purge volume
control solenoid valve circuit
shorted) An excessively high voltage signal is
sent to ECM through the valve Harness or connectors
(The solenoid valve circuit is shorted.)
EVAP canister purge volume control solenoid valve
EVAP canister purge volume control solenoid valve Ground Voltage
Connector Terminal
F48 1 Ground Battery voltage
Revision: 2010 May2011 QX56

Page 2347 of 5598

INFINITI QX56 2011 Factory Service Manual
P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-323
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Harness for open or short between EVAP canister purge volum

P0444, P0445 EVAP CANISTER PURGE VOLUME CONTROL SOLENOID
VALVE
EC-323
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Harness for open or short between EVAP canister purge volume control solenoid valve and ECM
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.CHECK EVAP CANISTER PURGE VOLUME CONTRO L SOLENOID VALVE OUTPUT SIGNAL CIRCUIT
FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between EVAP canister pur ge volume control solenoid valve harness connector and
ECM harness connector.
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES-1 >> With CONSULT-III: GO TO 4.
YES-2 >> Without CONSULT-III: GO TO 5.
NO >> Repair open circuit, short to ground or short to power in harness or connectors.
4.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE OPERATION
WITH CONSULT-III
1. Reconnect all harness connectors disconnected.
2. Start engine.
3. Perform “PURG VOL CONT/V” in “ACTIVE TEST” mode with CONSULT-III. Check that engine speed var-
ies 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 VO LUME CONTROL SOLENOID VALVE
Refer to EC-320, "
Component Inspection (EVAP Canister Purge Volume Control Solenoid Valve)".
Is the inspection result normal?
YES >> GO TO 6.
NO >> Replace EVAP canister purge volume control solenoid valve.
6.CHECK INTERMITTENT INCIDENT
Refer to GI-40, "
Intermittent Incident".
>> INSPECTION END
Component Inspection (EVAP Canister Purge Volume Control Solenoid Valve)
INFOID:0000000006288361
1.CHECK EVAP CANISTER PURGE VOLUME CONTROL SOLENOID VALVE
WITH CONSULT-III
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect EVAP purge hoses connected to EVAP c anister purge volume control solenoid valve.
4. Turn ignition switch ON.
5. Select “PURG VOL CONT/V” in “A CTIVE TEST” mode with CONSULT-III.
EVAP canister purge volume
control solenoid valve ECM
Continuity
Connector Terminal Connector Terminal
F48 2 F110 64 Existed
Revision: 2010 May2011 QX56

Page 2348 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-324
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0444, P0445 EVAP CANISTER P
URGE VOLUME CONTROL SOLENOID
VALVE
6. Touch “Qd” and “Qu” on CONSULT-III screen to adjust “PURG
VOL C/V” opening and

Page 2349 of 5598

INFINITI QX56 2011 Factory Service Manual
P0447 EVAP CANISTER VENT CONTROL VALVEEC-325
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0447 EVAP CANISTER VENT CONTROL VALVE
DTC LogicINFOID:0000000006288310
DTC DETECTION L

Page 2350 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-326
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0447 EVAP CANISTER VENT CONTROL VALVE
Is the inspection result normal?
YES >> GO TO 5.
NO >> GO TO 4.
4.DETECT MALFUNCTIONING PART
Check the following.
Har

Page 2351 of 5598

INFINITI QX56 2011 Factory Service Manual
P0447 EVAP CANISTER VENT CONTROL VALVEEC-327
< DTC/CIRCUIT DIAGNOSIS > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Component Inspection (EVAP C
anister Vent Control Valve)INFOID:0000000006288312
1.CHECK

Page 2352 of 5598

INFINITI QX56 2011 Factory Service Manual
EC-328
< DTC/CIRCUIT DIAGNOSIS >[VK56VD]
P0447 EVAP CANISTER VENT CONTROL VALVE
3. Check air passage continuity and operation delay time.
Check that new O-ring is installed properly.
Operation takes

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