2008 INFINITI FX35 Service Manual

Page 2113 of 3924

INFINITI FX35 2008  Service Manual 
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-873
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
Wiring DiagramINFOID:0000000001326704
BANK 1
Specification data are reference v

Page 2114 of 3924

INFINITI FX35 2008  Service Manual 
EC-874
< SERVICE INFORMATION >[VK45DE]
DTC P0172, P0175 FUEL IN
JECTION SYSTEM FUNCTION
Do not use ECM ground terminals when measuring in put/output voltage. Doing so may result in dam-
age to the EC

Page 2115 of 3924

INFINITI FX35 2008  Service Manual 
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-875
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
BANK 2
Specification data are reference values 
and are measured between each t

Page 2116 of 3924

INFINITI FX35 2008  Service Manual 
EC-876
< SERVICE INFORMATION >[VK45DE]
DTC P0172, P0175 FUEL IN
JECTION SYSTEM FUNCTION
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnosis ProcedureI

Page 2117 of 3924

INFINITI FX35 2008  Service Manual 
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-877
< SERVICE INFORMATION > [VK45DE]
C
D
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G H
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K L
M A
EC
NP
O
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK >> GO

Page 2118 of 3924

INFINITI FX35 2008  Service Manual 
EC-878
< SERVICE INFORMATION >[VK45DE]
DTC P0172, P0175 FUEL IN
JECTION SYSTEM FUNCTION
4.CHECK FUEL PRESSURE
1. Release fuel pressure to zero. Refer to  EC-665, "
Fuel Pressure Check".
2. Install fu

Page 2119 of 3924

INFINITI FX35 2008  Service Manual 
DTC P0172, P0175 FUEL INJECTION SYSTEM FUNCTION
EC-879
< SERVICE INFORMATION > [VK45DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
3. Turn ignition switch ON.
4. Check voltage between the following;
harness con

Page 2120 of 3924

INFINITI FX35 2008  Service Manual 
EC-880
< SERVICE INFORMATION >[VK45DE]
DTC P0172, P0175 FUEL IN
JECTION SYSTEM FUNCTION
OK or NG
OK >> GO TO 10.
NG >> Perform trouble diagnosis for  EC-1149
.
10.CHECK FUEL INJECTOR
1. Turn ignition