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DTC P1800 VIAS CONTROL SOLENOID VALVE EC-1225
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Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS004FG
TBWM1358E
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![INFINITI FX35 2006 Service Manual EC-1226
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DTC P1800 VIAS CONTROL SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do n INFINITI FX35 2006 Service Manual EC-1226
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DTC P1800 VIAS CONTROL SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do n](/manual-img/42/57019/w960_57019-2609.png)
EC-1226
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DTC P1800 VIAS CONTROL SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
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 ProcedureNBS004FH
1. CHECK VIAS CONTROL SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect VIAS control solenoid valve (1) harness connector.
–Vacuum tank (2)
3. Turn ignition switch ON.
4. Check voltage between VIAS control solenoid valve terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Harness connectors M82, F102
Harness for open or short between VIAS control solenoid valve and IPDM E/R
>> Repair harness or connectors.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
29 GY VIAS control solenoid valve [Engine is running]
Selector lever: P or N
0 - 1.0V
[Engine is running]
Selector lever: D
Engine speed: Below 5,000 rpm BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Engine speed: Above 5,000 rpm 0 - 1.0V
PBIB3236E
Voltage: Battery voltage
PBIB0173E
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![INFINITI FX35 2006 Service Manual DTC P1800 VIAS CONTROL SOLENOID VALVE EC-1227
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3. CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN INFINITI FX35 2006 Service Manual DTC P1800 VIAS CONTROL SOLENOID VALVE EC-1227
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3. CHECK VIAS CONTROL SOLENOID VALVE OUTPUT SIGNAL CIRCUIT FOR OPEN](/manual-img/42/57019/w960_57019-2610.png)
DTC P1800 VIAS CONTROL SOLENOID VALVE EC-1227
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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-1227, "
Component Inspection" .
OK or NG
OK >> GO TO 5.
NG >> Replace VIAS control solenoid valve.
5. CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Component InspectionNBS004FI
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. 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
PBIB0177E
Condition Air passage continuity
between A and B Air passage continuity
between A and C
12V direct current supply
between terminals 1 and 2 Ye s N o
No supply No Yes
MEC488B
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EC-1228
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DTC P1800 VIAS CONTROL SOLENOID VALVE
Revision: 2006 December 2006 FX35/FX45
Removal and InstallationNBS004FJ
VIAS CONTROL SOLENOID VALVE
Refer to EM-179, "INTAKE MANIFOLD" .
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![INFINITI FX35 2006 Service Manual DTC P1805 BRAKE SWITCH EC-1229
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Revision: 2006 December 2006 FX35/FX45
DTC P1805 BRAKE SWITCHPFP:25320
DescriptionNBS004FK
Brake switch signal is applied INFINITI FX35 2006 Service Manual DTC P1805 BRAKE SWITCH EC-1229
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DTC P1805 BRAKE SWITCHPFP:25320
DescriptionNBS004FK
Brake switch signal is applied](/manual-img/42/57019/w960_57019-2612.png)
DTC P1805 BRAKE SWITCH EC-1229
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DTC P1805 BRAKE SWITCHPFP:25320
DescriptionNBS004FK
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 ModeNBS004FL
Specification data are reference values.
On Board Diagnosis LogicNBS004FM
The MIL will not light up for this diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode.
DTC Confirmation ProcedureNBS004FN
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-1231, "
Diagnostic Proce-
dure" .
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
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EC-1230
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DTC P1805 BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
Wiring DiagramNBS004FO
TBWM1353E
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![INFINITI FX35 2006 Service Manual DTC P1805 BRAKE SWITCH EC-1231
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Revision: 2006 December 2006 FX35/FX45
Specification data are reference values and are measured between each terminal and INFINITI FX35 2006 Service Manual DTC P1805 BRAKE SWITCH EC-1231
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Specification data are reference values and are measured between each terminal and](/manual-img/42/57019/w960_57019-2614.png)
DTC P1805 BRAKE SWITCH EC-1231
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Revision: 2006 December 2006 FX35/FX45
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 ProcedureNBS004FP
1. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 1 and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
TER-
MINAL NO. WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
101 P/L Stop lamp switch [Ignition switch: OFF]
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14V)
Brake pedal Stop lamp
Fully released Not illuminated
Slightly depressed Illuminated
PBIB2558E
Voltage: Battery voltage
PBIB1184E
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![INFINITI FX35 2006 Service Manual EC-1232
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DTC P1805 BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
3. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E201
Harness for open and shor INFINITI FX35 2006 Service Manual EC-1232
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DTC P1805 BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
3. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E201
Harness for open and shor](/manual-img/42/57019/w960_57019-2615.png)
EC-1232
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DTC P1805 BRAKE SWITCH
Revision: 2006 December 2006 FX35/FX45
3. DETECT MALFUNCTIONING PART
Check the following.
10A fuse
Fuse block (J/B) connector E201
Harness for open and short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
4. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Disconnect stop lamp switch harness connector.
3. Check harness continuity between ECM terminal 101 and stop lamp switch terminal 2. Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E211, M41
Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6. CHECK STOP LAMP SWITCH
Refer to EC-1233, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7. CHECK INTERMITTENT INCIDENT
Refer to EC-811, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>> INSPECTION END
Continuity should exist.