Infiniti FX35 / FX45. Manual - part 580

 

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Infiniti FX35 / FX45. Manual - part 580

 

 

DTC P1800 VIAS CONTROL SOLENOID VALVE

EC-1081

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Wiring Diagram

INFOID:0000000001326965

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.

TBWM1358E

EC-1082

< SERVICE INFORMATION >

[VK45DE]

DTC P1800 VIAS CONTROL SOLENOID VALVE

Diagnosis Procedure

INFOID:0000000001326966

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-III 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.

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.

TER-

MI-

NAL 

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

Continuity should exist.

DTC P1800 VIAS CONTROL SOLENOID VALVE

EC-1083

< SERVICE INFORMATION >

[VK45DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

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-1083, "Component Inspection"

.

OK or NG

OK

>> GO TO 5.

NG

>> Replace VIAS control solenoid valve.

5.

CHECK INTERMITTENT INCIDENT

Refer to 

EC-717

.

>> INSPECTION END

Component Inspection

INFOID:0000000001326967

VIAS CONTROL SOLENOID VALVE

 With CONSULT-III

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.

5.

If NG, replace VIAS control solenoid valve.

 Without CONSULT-III

1.

Disconnect VIAS control solenoid valve.

2.

Check air passage continuity and operation delay time under the
following conditions.

Operation takes less than 1 second.

3.

If NG, replace VIAS control solenoid valve.

Removal and Installation

INFOID:0000000001326968

VIAS CONTROL SOLENOID VALVE

Refer to 

EM-175

.

Condition

VIAS SOL VALVE

Air passage continuity 

between A and B

Air passage continuity 

between A and C

ON

Yes

No

OFF

No

Yes

JMBIA0180ZZ

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

MEC488B

EC-1084

< SERVICE INFORMATION >

[VK45DE]

DTC P1805 BRAKE SWITCH

DTC P1805 BRAKE SWITCH

Description

INFOID:0000000001326969

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-III Reference Value in Data Monitor Mode

INFOID:0000000001326970

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326971

The MIL will not light up for this diagnosis.

FAIL-SAFE MODE

When the malfunction is detected, ECM enters fail-safe mode.

DTC Confirmation Procedure

INFOID:0000000001326972

1.

Turn ignition switch ON.

2.

Fully depress the brake pedal for at least 5 seconds.

3.

Erase the DTC with CONSULT-III.

4.

Check 1st trip DTC.

5.

If 1st trip DTC is detected, go to 

EC-1086, "Diagnosis Procedure"

.

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 ex-
tremely long time while the vehicle is driving.

• Harness or connectors

(Stop lamp switch circuit is open or short-
ed.)

• 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

 

 

 

 

 

 

 

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