Nissan Pathfinder (2005 year). Instruction — part 228
VIAS
EC-675
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EC
2005 Pathfinder
2.
CHECK VACUUM EXISTENCE
With CONSULT-II
1.
Stop engine and disconnect vacuum hose connected to power valve actuator.
2.
Start engine and let it idle.
3.
Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode with CONSULT-II.
4.
Turn VIAS control solenoid valve “ON” and “OFF”, and check
vacuum existence under the following conditions.
OK or NG
OK
>> Repair or replace power valve actuator.
NG
>> GO TO 4.
3.
CHECK VACUUM EXISTENCE
Without CONSULT-II
1.
Stop engine and disconnect vacuum hose connected to power valve actuator.
2.
Disconnect VIAS control solenoid valve harness connector.
3.
Start engine and let it idle.
4.
Apply 12V of direct current between VIAS control solenoid valve
terminals 1 and 2.
5.
Check vacuum existence under the following conditions.
OK or NG
OK
>> Repair or replace power valve actuator.
NG
>> GO TO 4.
4.
CHECK VACUUM HOSE
1.
Stop engine.
2.
Check hoses and tubes between intake manifold and power
valve actuator for crack, clogging, improper connection or dis-
connection. Refer to
.
OK or NG
OK
>> GO TO 5.
NG
>> Repair hoses or tubes.
VIAS SOL VALVE
Vacuum
ON
Should exist.
OFF
Should not exist.
PBIB0844E
Condition
Vacuum
12V direct current supply
Should exist.
No supply
Should not exist.
PBIB0845E
SEF109L
EC-676
VIAS
2005 Pathfinder
5.
CHECK VACUUM TANK
Refer to
EC-677, "Component Inspection"
.
OK or NG
OK
>> GO TO 6.
NG
>> Replace vacuum tank.
6.
CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect VIAS control solenoid valve harness connector.
3.
Turn ignition switch ON.
4.
Check voltage between terminal 1 and ground with CONSULT-II
or tester.
OK or NG
OK
>> GO TO 8.
NG
>> GO TO 7.
7.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E2, F32
●
Harness for open or short between VIAS control solenoid valve and IPDM E/R
●
Harness for open or short between VIAS control solenoid valve and ECM
>> Repair harness or connectors.
8.
CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between ECM terminal 29 and VIAS control solenoid valve terminal 2.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 9.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0569E
Voltage: Battery voltage
PBIB0173E
Continuity should exist.
VIAS
EC-677
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EC
2005 Pathfinder
9.
CHECK VIAS CONTROL SOLENOID VALVE
Refer to
EC-677, "Component Inspection"
.
OK or NG
OK
>> GO TO 10.
NG
>> Replace VIAS control solenoid valve.
10.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00KI4
VIAS CONTROL SOLENOID VALVE
With CONSULT-II
1.
Reconnect harness connectors disconnected.
2.
Turn ignition switch ON.
3.
Perform “VIAS SOL VALVE” in “ACTIVE TEST” mode.
4.
Check air passage continuity and operation delay time under the
following conditions.
Operation takes less than 1 second.
Without CONSULT-II
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Operation takes less than 1 second.
VACUUM TANK
1.
Disconnect vacuum hose connected to vacuum tank.
2.
Connect a vacuum pump to the port A of vacuum tank.
3.
Apply vacuum and make sure that vacuum exists at the port B.
Condition
VIAS SOL VALVE
Air passage continuity
between A and B
Air passage continuity
between A and C
ON
Yes
No
OFF
No
Yes
PBIB2505E
Condition
Air passage continuity
between A and B
Air passage continuity
between A and C
12V direct current supply
between terminals 1 and 2
Yes
No
No supply
No
Yes
PBIB2532E
PBIB0846E
EC-678
VIAS
2005 Pathfinder
Removal and Installation
UBS00KI5
VIAS CONTROL SOLENOID VALVE
Refer to
.
INJECTOR CIRCUIT
EC-679
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EC
2005 Pathfinder
INJECTOR CIRCUIT
PFP:16600
Component Description
UBS00KI6
The fuel injector is a small, precise solenoid valve. When the ECM
supplies a ground to the injector circuit, the coil in the injector is
energized. The energized coil pulls the ball valve back and allows
fuel to flow through the injector into the intake manifold. The amount
of fuel injected depends upon the injection pulse duration. Pulse
duration is the length of time the injector remains open. The ECM
controls the injection pulse duration based on engine fuel needs.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KI7
Specification data are reference values.
SEF375Z
MONITOR ITEM
CONDITION
SPECIFICATION
B/FUEL SCHDL
See
EC-148, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
INJ PULSE-B1
INJ PULSE-B2
●
Engine: After warming up
●
Shift lever: P or N
●
Air conditioner switch: OFF
●
No-load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
EC-680
INJECTOR CIRCUIT
2005 Pathfinder
Wiring Diagram
UBS00KI8
BBWA1774E
INJECTOR CIRCUIT
EC-681
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EC
2005 Pathfinder
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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
UBS00KI9
1.
INSPECTION START
Turn ignition switch to START.
Is any cylinder ignited?
Yes or No
Yes (With CONSULT-II)>>GO TO 2.
Yes (Without CONSULT-II)>>GO TO 3.
No
>> GO TO 7.
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.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 7.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
21
22
23
40
41
42
W
LG
SB
V
R
O
Injector No. 5
Injector No. 3
Injector No. 1
Injector No. 6
Injector No. 4
Injector No. 2
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,000 rpm
BATTERY VOLTAGE
(11 - 14V)
SEC984C
SEC985C
PBIB0133E
EC-682
INJECTOR CIRCUIT
2005 Pathfinder
3.
CHECK FUNCTION OF INJECTOR-I
Without CONSULT-II
1.
Stop engine.
2.
Disconnect harness connector F44, F101.
3.
Turn ignition switch ON.
4.
Check voltage between harness connector F44 terminal 3 and
ground with CONSULT-II or tester.
5.
Turn ignition switch OFF.
6.
Disconnect ECM harness connector.
7.
Check harness continuity between harness connector F44 and
ECM as follows.
Refer to Wiring Diagram.
8.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 5.
NG
>> GO TO 4.
4.
DETECT MALFUNCTIONING PART
Check the following.
●
Harness connectors E2, F32
●
IPDM E/R harness connector E119
●
15A fuse
●
Harness for open or short between harness connector F44 and fuse
●
Harness for open or short between harness connector F101 and injector
>> Repair open circuit or short to ground or short to power in harness or connectors.
BBIA0587E
Voltage: Battery voltage
Cylinder
Harness connector F44
terminal
ECM terminal
1
2
23
3
1
22
5
4
21
Continuity should exist.
PBIB2633E
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