Infiniti FX35 / FX45. Manual - part 431

DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)

EC-485

< SERVICE INFORMATION >

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DTC P1715 INPUT SPEED SENSOR (TURBINE REVOLUTION SENSOR)

Description

INFOID:0000000001326352

ECM receives turbine revolution sensor signal from TCM through CAN communication line. ECM uses this
signal for engine control.

CONSULT-III Reference Value in Data Monitor Mode

INFOID:0000000001326353

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326354

NOTE:
• If DTC P1715 is displayed with DTC U1000 or U1001 first perform the trouble diagnosis for DTC

U1000, U1001. Refer to 

EC-146

.

• If DTC P1715 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer

to 

EC-148

.

• If DTC P1715 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer

to 

EC-422

.

• If DTC P1715 is displayed with DTC P0335, first perform the trouble diagnosis for DTC P0335. Refer

to 

EC-319

.

• If DTC P1715 is displayed with DTC P0340 or P0345 first perform the trouble diagnosis for DTC

P0340 or P0345. Refer to 

EC-324

.

The MIL will not lights up for this self-diagnosis.

Diagnosis Procedure

INFOID:0000000001326355

1.

CHECK DTC WITH TCM

Check DTC with TCM. Refer to 

AT-38

.

OK or NG

OK

>> GO TO 2.

NG

>> Perform trouble shooting relevant to DTC indicated.

2.

REPLACE TCM

Replace TCM. Refer to 

AT-41

.

>> INSPECTION END

MONITOR ITEM

CONDITION

SPECIFICATION

I/P PULLY SPD

• Vehicle speed: More than 20 km/h (12MPH)

Almost the same speed as the 
tachometer indication

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

P1715
1715

Input speed sensor
(Turbine revolution sen-
sor)
(TCM output)

Turbine revolution sensor signal is differ-
ent from the theoretical value calculated 
by ECM from revolution sensor signal and 
engine rpm signal.

• Harness or connectors

(CAN communication line is open or shorted)

• Harness or connectors

(Turbine revolution sensor circuit is open or 
shorted)

• TCM

EC-486

< SERVICE INFORMATION >

[VQ35DE]

DTC P1805 BRAKE SWITCH

DTC P1805 BRAKE SWITCH

Description

INFOID:0000000001326356

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:0000000001326357

Specification data are reference values.

On Board Diagnosis Logic

INFOID:0000000001326358

The MIL will not light up for this self-diagnosis.

FAIL-SAFE MODE

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

DTC Confirmation Procedure

INFOID:0000000001326359

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.

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-488, "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

DTC P1805 BRAKE SWITCH

EC-487

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Wiring Diagram

INFOID:0000000001326360

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.

TBWM1403E

EC-488

< SERVICE INFORMATION >

[VQ35DE]

DTC P1805 BRAKE SWITCH

Diagnosis Procedure

INFOID:0000000001326361

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-III or tester.

OK or NG

OK

>> GO TO 4.

NG

>> GO TO 3.

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

TER-

MI-

NAL 

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

PBIB1605E

Voltage: Battery voltage

PBIB1184E