Nissan Almera Tino V10. Manual — part 425
EC-526
[QG (WITH EURO-OBD)]
INJECTOR CIRCUIT
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
Diagnostic Procedure
EBS00QTF
1.
INSPECTION START
Turn ignition switch to “START”.
Is any cylinder ignited?
Yes or No
Yes
>> GO TO 2.
No
>> GO TO 3.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
22
23
41
42
G/B
R/B
L/B
Y/B
Injector No. 3
Injector No. 1
Injector No. 4
Injector No. 2
[Engine is running]
●
Warm-up condition
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed is 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
PBIB0529E
PBIB0530E
INJECTOR CIRCUIT
EC-527
[QG (WITH EURO-OBD)]
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.
PBIB0133E
MEC703B
EC-528
[QG (WITH EURO-OBD)]
INJECTOR CIRCUIT
3.
CHECK INJECTOR POWER SUPPLY CIRCUIT
1.
Turn ignition switch “OFF”.
2.
Disconnect injector harness connector.
3.
Turn ignition switch “ON”.
4.
Check voltage between injector terminal 1 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors M71, F45
●
Fuse block (J/B) connector M1
●
10A fuse
●
Harness for open or short between injector and fuse
>> Repair open circuit or short to ground or short to power in harness or connectors.
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 22, 23, 41, 42.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 6.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK INJECTOR
Refer to
EC-529, "Component Inspection"
.
OK or NG
OK
>> GO TO 7.
NG
>> Replace injector.
MBIB0101E
Voltage: Battery voltage
PBIB0582E
Continuity should exist.
INJECTOR CIRCUIT
EC-529
[QG (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
7.
CHECK INTERMITTENT INCIDENT
Refer to
EC-138, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
EBS00QTG
INJECTOR
1.
Disconnect injector harness connector.
2.
Check resistance between terminals as shown in the figure.
Removal and Installation
EBS00QTH
INJECTOR
Refer to
EM-29, "FUEL INJECTOR AND FUEL TUBE"
.
Resistance: 13.5 - 17.5
Ω
[at 20
°
C (68
°
F)]
PBIB0181E
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