Infiniti I30 (A33). Manual — part 324
3
CHECK INJECTOR POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect injector harness connectors (bank 2) and harness connectors F43, F191 (bank 1).
SEF276X
SEF281XA
3. Turn ignition switch “ON”.
4. Check voltage between injector terminal 1 and ground, harness connector F43 terminal 5 and ground with CONSULT-II
or tester.
SEF897X
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 4.
4
DETECT MALFUNCTIONING PART
Check the following.
I
Harness connectors M46, F44
I
Harness connectors F43, F191
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 F43 and fuse
©
Repair harness or connectors.
GI
MA
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LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-611
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 103, 104, 107, harness connector F191 termi-
nals 6, 2, 1 and ECM terminals 101, 105, 102. 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 connectors F43, F191
I
Harness for open or short between harness connector F191 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 (RIGHT BANK)
1. Remove intake manifold collector.
2. Disconnect injector harness connectors (Right bank).
3. Check harness continuity between the following terminals. Refer to Wiring Diagram.
MTBL0359
Continuity should exist.
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.
SEF964XA
OK or NG
OK
©
GO TO 9.
NG
©
Replace injector.
INJECTOR
Diagnostic Procedure (Cont’d)
EC-612
9
CHECK INTERMITTENT INCIDENT
Refer to “TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT”, EC-144.
©
INSPECTION END
GI
MA
EM
LC
FE
AT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
INJECTOR
Diagnostic Procedure (Cont’d)
EC-613
CONSULT-II Reference Value in Data Monitor
Mode
NHEC0388
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
START SIGNAL
I
Ignition switch: ON
,
START
,
ON
OFF
,
ON
,
OFF
START SIGNAL
CONSULT-II Reference Value in Data Monitor Mode
EC-614
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