Infiniti Q45. Manual — part 518
FUEL INJECTOR
EC-711
C
D
E
F
G
H
I
J
K
L
M
A
EC
3.
CHECK FUNCTION OF FUEL INJECTOR-I
1.
Turn ignition switch OFF.
2.
Disconnect harness connector F21, F201 (bank 1) and F41, F221 (bank 2).
3.
Turn ignition switch ON.
4.
Check voltage between the following;
harness connector F21 terminal 5 and ground,
harness connector F41 terminal 5 and ground
with CONSULT-II or tester.
5.
Turn ignition switch OFF.
6.
Disconnect ECM harness connector.
7.
Check harness continuity between the following terminals.
8.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
Voltage: Battery voltage
Cylinder
Harness connector terminal
ECM terminal
1
F21 terminal 3
23
3
F21 terminal 2
22
5
F21 terminal 1
21
7
F21 terminal 6
44
2
F41 terminal 3
42
4
F41 terminal 2
41
6
F41 terminal 1
40
8
F41 terminal 6
63
Continuity should exist.
PBIB2438E
PBIB0180E
EC-712
FUEL INJECTOR
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E32, F32
●
Harness connectors F21, F201
●
Harness connectors F41, F221
●
Fuse block (J/B) No. 1 connector M1
●
Fuse block (J/B) No. 2 connectors M143, E215
●
15A fuse
●
Harness for open or short between harness connector F21 and fuse
●
Harness for open or short between harness connector F41 and fuse
●
Harness for open or short between harness connector F21 and ECM
●
Harness for open or short between harness connector F41 and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK FUNCTION OF FUEL INJECTOR-II
Provide battery voltage between the following terminals, and then
interrupt it. Listen to each fuel injector operating sound.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 6.
Cylinder
Harness connector
terminal
(+)
(–)
1
F201
5
3
3
2
5
1
7
6
2
F221
5
3
4
2
6
1
8
6
Operating sound should exist.
PBIB2449E
FUEL INJECTOR
EC-713
C
D
E
F
G
H
I
J
K
L
M
A
EC
6.
CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT
1.
Disconnect injector harness connectors.
2.
Check harness continuity between the following terminals. Refer to Wiring Diagram.
3.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK FUEL INJECTOR
Refer to
EC-714, "Component Inspection"
OK or NG
OK
>> GO TO 8.
NG
>> Replace fuel injector.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
Harness connector terminal
Fuel injector terminal
F201 terminal 1
2
F201 terminal 2
F201 terminal 3
F201 terminal 6
F201 terminal 5
1
F221 terminal 1
2
F221 terminal 2
F221 terminal 3
F221 terminal 6
F221 terminal 5
1
Continuity should exist.
PBIB2423E
EC-714
FUEL INJECTOR
Component Inspection
NBS00278
FUEL INJECTOR
1.
Disconnect fuel injector harness connector.
2.
Check resistance between terminals as shown in the figure.
Removal and Installation
NBS00279
FUEL INJECTOR
Refer to
EM-32, "FUEL INJECTOR AND FUEL TUBE"
Resistance: 13.5 - 17.5
Ω
[at 10 - 60
°
C (50 - 140
°
F)]
PBIB1727E
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