2008 INFINITI QX56 Factory Service Manual

Page 1513 of 4083

INFINITI QX56 2008  Factory Service Manual EC-214
< COMPONENT DIAGNOSIS >[VK56DE]
P0340 CMP SENSOR (PHASE)
4. Visually check the sensor for chipping.
5. Check resistance as shown in the figure.
PBIB0563E
Terminal No. (Polarity)
Resistance Ω

Page 1514 of 4083

INFINITI QX56 2008  Factory Service Manual P0420, P0430 THREE WAY CATALYST FUNCTIONEC-215
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0420, P0430 THREE WAY CATALYST FUNCTION
On Board Diagnosis LogicINFOID:0000000001351568

Page 1515 of 4083

INFINITI QX56 2008  Factory Service Manual EC-216
< COMPONENT DIAGNOSIS >[VK56DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
Overall Function Check
INFOID:0000000001351570
Use this procedure to check the overall function of the th ree way cataly

Page 1516 of 4083

INFINITI QX56 2008  Factory Service Manual P0420, P0430 THREE WAY CATALYST FUNCTIONEC-217
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
OK or NG
OK >> GO TO 5.
NG >> Follow the 
EC-13, "
Basic Inspection".
5.CHECK FUEL INJEC

Page 1517 of 4083

INFINITI QX56 2008  Factory Service Manual EC-218
< COMPONENT DIAGNOSIS >[VK56DE]
P0420, P0430 THREE WAY CATALYST FUNCTION
NG >> GO TO 7.
7.CHECK FUNCTION OF IGNITION COIL-II
1. Turn ignition switch OFF.
2. Disconnect spark plug and connect a

Page 1518 of 4083

INFINITI QX56 2008  Factory Service Manual P0441 EVAP CONTROL SYSTEMEC-219
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
P0441 EVAP CONTROL SYSTEM
System DescriptionINFOID:0000000001351572
NOTE:
If DTC P0441 is displayed wit

Page 1519 of 4083

INFINITI QX56 2008  Factory Service Manual EC-220
< COMPONENT DIAGNOSIS >[VK56DE]
P0441 EVAP CONTROL SYSTEM
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Start engine and let it idle for at least 70 seconds.
4. Select “PURG FL

Page 1520 of 4083

INFINITI QX56 2008  Factory Service Manual P0441 EVAP CONTROL SYSTEMEC-221
< COMPONENT DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
 
With CONSULT-III
1. Disconnect vacuum hose connected to EVAP canister  purge volume control solenoid