Nissan Pathfinder. Manual — part 521
EC-390
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1800 VIAS CONTROL SOLENOID VALVE 1
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK VIAS CONTROL SOLENOID VALVE 1
Check VIAS control solenoid valve 1. Refer to
EC-391, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace VIAS control solenoid valve 1. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Compo-
Component Inspection
INFOID:0000000009178313
1.
CHECK VIAS CONTROL SOLENOID VALVE 1
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect vacuum hoses connected to VIAS control solenoid valve 1.
4. Turn ignition switch ON.
5. Select “VIAS S/V-1” in “ACTIVE TEST” mode with CONSULT.
6. Check air passage continuity and operation delay time under the
following conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 1 harness connector.
3. Disconnect vacuum hoses connected to VIAS volume control solenoid valve 1.
4. Check air passage continuity and operation delay time under the
following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace VIAS control solenoid valve 1. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Compo-
VIAS control solenoid valve 1
ECM
Continuity
Connector
Terminal
Connector
Terminal
F66
2
F51
39
Existed
Condition
(VIAS S/V-1)
Air passage continuity
between
and
Air passage continuity
between
and
ON
Existed
Not existed
OFF
Not existed
Existed
JMBIA0180ZZ
Condition
Air passage continuity
between
and
Air passage continuity
between
and
12 V direct current supply
between terminals 1 and 2
Existed
Not existed
No supply
Not existed
Existed
PBIB2532E
P1801 VIAS CONTROL SOLENOID VALVE 2
EC-391
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P1801 VIAS CONTROL SOLENOID VALVE 2
DTC Logic
INFOID:0000000009178314
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
CONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
TESTING CONDITION:
Before performing the following procedure, confirm battery voltage is more than 11 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and let it idle for at least 5 seconds.
2. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Proceed to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178315
1.
CHECK VIAS CONTROL SOLENOID VALVE 2 POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 2 harness connector.
3. Turn ignition switch ON.
4. Check the voltage between VIAS control solenoid valve 2 harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
2.
CHECK VIAS CONTROL SOLENOID VALVE 2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check the continuity between VIAS control solenoid valve 2 harness connector and ECM harness con-
nector.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1801
VIAS S/V CIRC-B2
(VIAS solenoid valve circuit
bank 2)
An excessively low or high voltage signal
is sent to ECM through the VIAS control
solenoid valve 2.
• Harness or connectors
(The solenoid valve 2 circuit is open or
shorted.)
• VIAS control solenoid valve 2
VIAS control solenoid valve 2
Ground
Voltage
Connector
Terminal
F67
1
Ground
Battery voltage
EC-392
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
P1801 VIAS CONTROL SOLENOID VALVE 2
4. Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK VIAS CONTROL SOLENOID VALVE 2
Check VIAS control solenoid valve 2. Refer to
EC-393, "Component Inspection"
.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> Replace VIAS control solenoid valve 2. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Compo-
Component Inspection
INFOID:0000000009178316
1.
CHECK VIAS CONTROL SOLENOID VALVE 2
With CONSULT
1. Turn ignition switch OFF.
2. Reconnect all harness connectors disconnected.
3. Disconnect vacuum hoses connected to VIAS control solenoid valve 2.
4. Turn ignition switch ON.
5. Select “VIAS S/V-2” in “ACTIVE TEST” mode with CONSULT.
6. Check air passage continuity and operation delay time under the
following conditions.
Without CONSULT
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve 2 harness connector.
3. Disconnect vacuum hoses connected to VIAS volume control solenoid valve 2.
4. Check air passage continuity and operation delay time under the
following conditions.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace VIAS control solenoid valve 2. Refer to
EC-14, "ENGINE CONTROL SYSTEM : Compo-
VIAS control solenoid valve 2
ECM
Continuity
Connector
Terminal
Connector
Terminal
F67
2
F51
40
Existed
Condition
(VIAS S/V-2)
Air passage continuity
between
and
Air passage continuity
between
and
ON
Existed
Not existed
OFF
Not existed
Existed
JMBIA0180ZZ
Condition
Air passage continuity
between
and
Air passage continuity
between
and
12 V direct current supply
between terminals 1 and 2
Existed
Not existed
No supply
Not existed
Existed
PBIB2532E
P1805 BRAKE SWITCH
EC-393
< DTC/CIRCUIT DIAGNOSIS >
[VQ35DE]
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P1805 BRAKE SWITCH
Description
INFOID:0000000009178317
Brake switch signal is applied to the ECM via the stop lamp switch when the brake pedal is depressed. This
signal is used mainly to decrease the engine speed when the vehicle is driven.
DTC Logic
INFOID:0000000009178318
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PERFORM DTC CONFIRMATION PROCEDURE
1. Turn ignition switch ON.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000009178319
1.
CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
Is the inspection result normal?
YES
>> Check intermittent incident. Refer to
GI-49, "Intermittent Incident"
.
NO
>> GO TO 2.
2.
CHECK STOP LAMP SWITCH POWER SUPPLY
1. Disconnect stop lamp switch harness connector.
2. Check the voltage between stop lamp switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Perform the trouble diagnosis for power supply circuit.
3.
CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check the continuity between stop lamp switch harness connector and ECM harness connector.
DTC No.
CONSULT screen terms
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P1805
BRAKE SW/CIRCUIT
(Stop lamp switch circuit)
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
Brake pedal
Stop lamp
Fully released
Not illuminated
Slightly depressed
Illuminated
Stop lamp switch
Ground
Voltage
Connector
Terminal
E38
1
Ground
Battery voltage
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