Nissan Frontier D22. Instruction — part 654
INJECTOR CIRCUIT
EC-1719
[VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK OVERALL FUNCTION
With CONSULT-II
1.
Start engine.
2.
Perform “POWER BALANCE” in “ACTIVE TEST” mode with
CONSULT-II.
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.
Clicking noise should be heard.
OK or NG
OK
>> INSPECTION END.
NG
>> GO TO 3.
3.
CHECK INJECTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect injector harness connector.
3.
Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
SEF070Y
MEC703B
Voltage: Battery voltage
SEF671W
EC-1720
[VG33ER]
INJECTOR CIRCUIT
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M59, F27
●
Harness connectors F37, F101
●
Fuse block (J/B) connector M26
●
10A fuse
●
Harness for open or short between injector and fuse
>> Repair harness or connectors.
5.
CHECK INJECTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect ECM harness connector.
2.
Check harness continuity between injector terminal 2 and ECM terminals 102, 104, 106, 109, 111, 113.
Refer to Wiring Diagram.
3.
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.
●
Harness connectors F37, F101
●
Harness connectors F38, F102
●
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 INJECTOR
1.
Disconnect injector harness connector.
2.
Check resistance between terminals as shown in the figure.
OK or NG
OK
>> GO TO 8.
NG
>> Replace injector.
8.
CHECK INTERMITTENT INCIDENT
EC-1297, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END.
Removal and Installation
UBS00E2Q
INJECTOR
EM-80, "OUTER COMPONENT PARTS"
Continuity should exist.
Resistance: 10 - 14
Ω [at 25°C (77°F)]
SEF625V
START SIGNAL
EC-1721
[VG33ER]
C
D
E
F
G
H
I
J
K
L
M
A
EC
START SIGNAL
PFP:48750
CONSULT-II Reference Value in Data Monitor Mode
UBS00E2R
Specification data are reference values.
MONITOR ITEM
CONDITION
SPECIFICATION
START SIGNAL
●
Ignition switch: ON
→ START → ON
OFF
→ ON → OFF
EC-1722
[VG33ER]
START SIGNAL
Wiring Diagram
UBS00E2S
BBWA1097E
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