Nissan Pathfinder (2005 year). Instruction — part 221
DTC P1706 PNP SWITCH
EC-619
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EC
2005 Pathfinder
5.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-II
1.
Disconnect ECM harness connector.
2.
Check harness continuity between ECM terminal 102 and combination meter terminal 7.
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 E152, M31
●
Harness for open or short between ECM and combination meter
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-III
1.
Check harness continuity between A/T assembly terminal 9 and TCM terminal 8.
Refer to
AT-103, "DTC P0615 START SIGNAL CIRCUIT"
.
2.
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 INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> GO TO 9.
NG
>> Repair or replace.
9.
REPLACE COMBINATION METER
Refer to
.
>> INSPECTION END
Continuity should exist.
Continuity should exist.
EC-620
DTC P1800 VIAS CONTROL SOLENOID VALVE
2005 Pathfinder
DTC P1800 VIAS CONTROL SOLENOID VALVE
PFP:14955
Component Description
UBS00KGK
The VIAS control solenoid valve cuts the intake manifold vacuum
signal for power valve control. It responds to ON/OFF signals from
the ECM. When the solenoid is off, the vacuum signal from the
intake manifold is cut. When the ECM sends an ON signal the coil
pulls the plunger downward and feeds the vacuum signal to the
power valve actuator.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KGL
Specification data are reference values.
On Board Diagnosis Logic
UBS00KGM
The MIL will not light up for this self-diagnosis.
DTC Confirmation Procedure
UBS00KGN
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is between 11V at idle.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine and let it idle for at least 5 seconds.
4.
If 1st trip DTC is detected, go to
EC-622, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
BBIA0569E
MONITOR ITEM
CONDITION
SPECIFICATION
VIAS S/V
●
Engine: After warming up
2,200 - 3,300 rpm
ON
Except above conditions
OFF
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1800
1800
VIAS control solenoid valve cir-
cuit
An excessively low or high voltage signal
is sent to ECM through the valve
●
Harness or connectors
(The solenoid valve circuit is open or
shorted.)
●
VIAS control solenoid valve
SEF058Y
DTC P1800 VIAS CONTROL SOLENOID VALVE
EC-621
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2005 Pathfinder
Wiring Diagram
UBS00KGO
BBWA1768E
EC-622
DTC P1800 VIAS CONTROL SOLENOID VALVE
2005 Pathfinder
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.
Diagnostic Procedure
UBS00KGP
1.
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 3.
NG
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
29
G
VIAS control solenoid valve
[Engine is running]
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Engine speed: Between 2,200 and 3,300
rpm.
0 - 1.0V
111
BR
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
●
A few seconds passed after turning ignition
switch OFF
BATTERY VOLTAGE
(11 - 14V)
119
120
R
P
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
BBIA0569E
Voltage: Battery voltage
PBIB0173E
DTC P1800 VIAS CONTROL SOLENOID VALVE
EC-623
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2005 Pathfinder
2.
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.
3.
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 4.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
4.
CHECK VIAS CONTROL SOLENOID VALVE
Refer to
EC-623, "Component Inspection"
.
OK or NG
OK
>> GO TO 5.
NG
>> Replace VIAS control solenoid valve.
5.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
>> INSPECTION END
Component Inspection
UBS00KGQ
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.
Continuity should exist.
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
EC-624
DTC P1800 VIAS CONTROL SOLENOID VALVE
2005 Pathfinder
With GST
Check air passage continuity and operation delay time under the fol-
lowing conditions.
Operation takes less than 1 second.
Removal and Installation
UBS00KGR
VIAS CONTROL SOLENOID VALVE
Refer to
.
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
DTC P1805 BRAKE SWITCH
EC-625
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2005 Pathfinder
DTC P1805 BRAKE SWITCH
PFP:25320
Description
UBS00KGS
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KGT
Specification data are reference values.
On Board Diagnosis Logic
UBS00KGU
The MIL will not light up for this diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode.
DTC Confirmation Procedure
UBS00KGV
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Fully depress the brake pedal for at least 5 seconds.
3.
Erase the DTC with CONSULT-II.
4.
Select “DATA MONITOR” mode with CONSULT-II.
5.
If 1st trip DTC is detected, go to
EC-627, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW
●
Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1805
1805
Brake switch
A brake switch signal is not sent to ECM for
extremely long time while the vehicle is driving.
●
Harness or connectors
(Stop lamp switch circuit is open or
shorted.)
●
Stop lamp switch
Engine operating condition in fail-safe mode
ECM controls the electric throttle control actuator by regulating the throttle opening to a small range.
Therefore, acceleration will be poor.
Vehicle condition
Driving condition
When engine is idling
Normal
When accelerating
Poor acceleration
SEF058Y
EC-626
DTC P1805 BRAKE SWITCH
2005 Pathfinder
Wiring Diagram
UBS00KGW
BBWA1769E
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