Infiniti FX35, FX50 (S51). Manual - part 1824

P1705 TP SENSOR

TM-103

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

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P1705 TP SENSOR

Description

INFOID:0000000005250087

• The accelerator pedal position sensor is installed on the upper end of the accelerator pedal assembly.
• The accelerator pedal position sensor detects the accelerator position.
• The accelerator pedal position sensor transform the accelerator pedal position into output voltage, and emit

the voltage signal to the ECM.

• The TCM receives accelerator pedal position signal from the ECM via CAN communication.

DTC Logic

INFOID:0000000005250088

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

Always drive vehicle at a safe speed.

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “SLCT LVR POSI” and “VHCL/S SE-A/T” in “Data Monitor” in “TRANSMISSION”.

3.

Drive vehicle and maintain the following conditions for 5 seconds or more.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1705” detected?

YES

>> Go to 

TM-103, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005250089

1.

CHECK DTC OF ECM 

 With CONSULT-III

1.

Turn ignition switch ON.

2.

Perform “Self Diagnostic Results” in “ENGINE”.

Is any DTC detected?

YES

>> Check DTC detected item. Refer to 

EC-541, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DTC OF TCM

 With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is any DTC other than “P1705” detected?

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P1705

Accelerator Pedal Position Sen-
sor Signal

TCM detects the difference be-
tween two accelerator pedal po-
sition signals received from 
ECM via CAN communication.

Harness or connectors
(Sensor circuit is open or short-
ed.)

SLCT LVR POSI

: D

VHCL/S SE-A/T

: 5 km/h (3 MPH) or more

TM-104

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P1705 TP SENSOR

YES

>> Check DTC detected item. Refer to 

TM-150, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to 

TM-181, "2WD : Exploded View"

 (2WD), 

TM-184, "AWD :

Exploded View"

 (AWD).

NO

>> Repair or replace damaged parts.

P1721 VEHICLE SPEED SIGNAL

TM-105

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

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P1721 VEHICLE SPEED SIGNAL

Description

INFOID:0000000005250090

The vehicle speed signal is transmitted from unified meter and A/C amp. to TCM by CAN communication line.
The signal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will
then use the vehicle speed signal.

DTC Logic

INFOID:0000000005250091

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

CAUTION:

• Always drive vehicle at a safe speed.
• Be careful not to rev engine into the red zone on the tachometer.

1.

PRECONDITIONING

If “DTC CONFIRMATION PROCEDURE” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.

>> GO TO 2.

2.

CHECK DTC DETECTION

 With CONSULT-III

1.

Start the engine.

2.

Select “ESTM VSP SIG” in “Data Monitor” in “TRANSMISSION”.

3.

Drive vehicle and maintain the following conditions for 60 seconds or more.

4.

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is “P1721” detected?

YES

>> Go to 

TM-106, "Diagnosis Procedure"

.

NO

>> INSPECTION END

DTC

Trouble diagnosis name

DTC is detected if...

Possible cause

P1721

Vehicle Speed Signal

• The vehicle speed transmit-

ted from the unified meter 
and A/C amp. to TCM is 5 km/
h (3MPH) or less when the 
vehicle speed detected by 
the output speed sensor is 20 
km/h or more. (Only when 
starts after the ignition switch 
is turned ON.)

• The vehicle speed detected 

by the output speed sensor 
does not decrease despite 
the 36 km/h (23 MPH) or 
more of deceleration in vehi-
cle speed received from the 
unified meter and A/C amp. 
when the vehicle speed 
transmitted from the unified 
meter and A/C amp. to TCM 
is 36 km/h (23 MPH) or more 
and the vehicle speed detect-
ed by the output speed sen-
sor is 24 (15 MPH) or more.

Harness or connectors
(Sensor circuit is open or short-
ed.)

ESTM VSP SIG

: 40 km/h (25 MPH) or more

TM-106

< DTC/CIRCUIT DIAGNOSIS >

[7AT: RE7R01A (VQ35HR)]

P1721 VEHICLE SPEED SIGNAL

Diagnosis Procedure

INFOID:0000000005250092

1.

CHECK DTC OF UNIFIED METER AND A/C AMP.

 With CONSULT-III

Perform “Self Diagnostic Results” in “METER/M&A”.
Is any DTC detected?

YES

>> Check DTC detected item. Refer to 

MWI-119, "DTC Index"

.

NO

>> GO TO 2.

2.

CHECK DTC OF TCM

 With CONSULT-III

Perform “Self Diagnostic Results” in “TRANSMISSION”.

Is any DTC other than “P1721” detected?

YES

>> Check DTC detected item. Refer to 

TM-150, "DTC Index"

.

NO

>> GO TO 3.

3.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-36, "Intermittent Incident"

.

Is the inspection result normal?

YES

>> Replace A/T assembly. Refer to 

TM-181, "2WD : Exploded View"

 (2WD), 

TM-184, "AWD :

Exploded View"

 (AWD).

NO

>> Repair or replace damaged parts.