Infiniti F50. Manual - part 68

DTC P1721 VEHICLE SPEED SENSOR MTR

AT-157

D

E

F

G

H

I

J

K

L

M

A

B

AT

DTC P1721 VEHICLE SPEED SENSOR MTR

PFP:24814

Description

ECS00862

The vehicle speed sensor·MTR signal is transmitted from combination meter to TCM by CAN communication
line. The signal functions as an auxiliary device to the revolution sensor when it is malfunctioning. The TCM
will then use the vehicle speed sensor·MTR signal.

On Board Diagnosis Logic

ECS00863

●

This is not an OBD-II self-diagnostic item.

●

Diagnostic trouble code “VHE SPD SE·MTR” with CONSULT-II is detected when TCM does not receive
the proper vehicle speed sensor MTR signal (input by CAN communication) from combination meter.

Possible Cause

ECS00864

Harness or connectors
(The sensor circuit is open or shorted.)

DTC Confirmation Procedure

ECS00865

CAUTION:

Always drive vehicle at a safe speed.
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.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

Select “DATA MONITOR” mode for “A/T” with CONSULT-II.

3.

Start engine and maintain the following conditions for at least 5
consecutive seconds.
ACCELE POS: 1/8 or less
VHCL SPEED SE: 30 km/h (17 MPH) or more

4.

If DTC is detected, go to 

AT-157, "Diagnostic Procedure"

 .

Diagnostic Procedure

ECS00866

1. 

CHECK INPUT SIGNALS

 With CONSULT-II

1.

Start engine.

2.

Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“A/T” with CONSULT-II.

3.

Vehicle start and read out the value of “VHCL/S SE·MTR”.

OK or NG

OK

>> GO TO 3.

NG

>> GO TO 2.

SAT014K

PCIA0033E

AT-158

DTC P1721 VEHICLE SPEED SENSOR MTR

2. 

CHECK DTC, STEP 1

Check following items.

1.

Refer to 

AT-99, "DTC U1000 CAN COMMUNICATION LINE"

 .

2.

Refer to 

BRC-26, "CONSULT-II Functions"

 .

3.

Refer to 

DI-7, "COMBINATION METERS"

 .

OK or NG

OK

>> INSPECTION END

NG

>> If NG, recheck pin terminals for damage or loose connection with harness connector.

3. 

CHECK DTC, STEP 2

Perform DTC confirmation procedure. 

AT-157, "DTC Confirmation Procedure"

 .

OK or NG

OK

>> INSPECTION END

NG

>> If the system returns a malfunction, recheck pin terminals for damage or loose connection with

harness connector.

DTC P1730 A/T INTERLOCK

AT-159

D

E

F

G

H

I

J

K

L

M

A

B

AT

DTC P1730 A/T INTERLOCK

PFP:00000

Description

ECS00867

●

Fail-safe function to detect interlock conditions.

●

Fail-safe function to the transmission range switch detects the selector position and sends a signal to the
TCM.

On Board Diagnosis Logic

ECS00868

●

This is an OBD-II self-diagnostic item.

●

Diagnostic trouble code “A/T INTERLOCK” with CONSULT-II or P1730 without CONSULT-II is detected
when TCM does not receive the proper voltage signal from the sensor and switch.

●

TCM monitors and compares gear position and conditions of each pressure switch when gear is steady.

Possible Cause

ECS00869

●

Harness or connectors
(The solenoid and switch circuit is open or shorted.)

●

Input, direct, high & low reverse clutch, front, low coast brake solenoid valve

●

Pressure switch 1, 2, 3, 5 and 6

DTC Confirmation Procedure

ECS0086A

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.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

 WITH CONSULT-II

1.

Turn ignition switch to “ON” position. (Do not start engine.)

2.

Select “DATA MONITOR” mode for “A/T” with CONSULT-II.

3.

Start engine.

4.

Drive vehicle and maintain the following conditions for at least 2
consecutive seconds.
Selector lever: “D” position 

5.

If DTC is detected, go to 

AT-165, "Diagnostic Procedure"

 .

 WITH GST

Follow the procedure “With CONSULT-II”.

SAT014K

AT-160

DTC P1730 A/T INTERLOCK

Wiring Diagram — AT — I/LOCK

ECS0086B

TCWM0013E