Infiniti I35 (A33). Manual — part 339
Wiring Diagram
NHEC0386
MEC564D
SEF796YC
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Wiring Diagram
EC-697
Diagnostic Procedure
NHEC0387
1
INSPECTION START
Turn ignition switch to “START”.
Is any cylinder ignited?
Yes or No
Yes
©
GO TO 2.
No
©
GO TO 3.
2
CHECK OVERALL FUNCTION
With CONSULT-II
1. Start engine.
2. Perform “POWER BALANCE” in “ACTIVE TEST” mode with CONSULT-II.
PBIB0133E
3. Make sure that each circuit produces a momentary engine speed drop.
Without CONSULT-II
1. Start engine.
2. Listen to each injector operating sound.
MEC703B
Clicking noise should be heard.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 3.
INJECTOR
Diagnostic Procedure
EC-698
3
CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect injector harness connectors (bank 2) and harness connectors F58, F197 (bank 1).
SEC007E
SEC087D
3. Turn ignition switch ON.
4. Check voltage between injector terminal 1 and ground, harness connector F56 terminal 5 and ground with CONSULT-II
or tester.
SEC008E
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M229, F66
I
Fuse block (J/B) connector M19
I
10A fuse
I
Harness for open or short between injector and fuse
I
Harness for open or short between harness connector F56 and fuse
©
Repair harness or connectors.
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-699
5
CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between injector terminal 2 and ECM terminals 2, 11, 13, harness connector F56 terminals 6,
2, 1 and ECM terminals 1, 3, 12. Refer to Wiring Diagram.
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 7.
NG
©
GO TO 6.
6
DETECT MALFUNCTIONING PART
Check the following.
I
Harness for open or short between harness connector F58 and ECM
I
Harness for open or short between ECM and injector
©
Repair open circuit or short to ground or short to power in harness or connectors.
7
CHECK SUB-HARNESS CIRCUIT FOR OPEN AND SHORT (BANK 1)
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (Bank 1).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
MTBL1173
Continuity should exist.
4. Also check harness for short to ground and short to power.
OK or NG
OK
©
GO TO 8.
NG
©
Repair open circuit or short to ground or short to power in harness or connectors.
8
CHECK INJECTOR
1. Disconnect injector harness connector.
2. Check resistance between terminals as shown in the figure.
SEF964XE
OK or NG
OK
©
GO TO 9.
NG
©
Replace injector.
INJECTOR
Diagnostic Procedure (Cont’d)
EC-700
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