P1723

P1723 SPEED SENSOR

Description

- The primary speed sensor is included in the control valve assembly.
- The secondary speed sensor detects the revolution of the idler gear and generates a pulse signal. The pulse signal is sent to the TCM, which converts it into vehicle speed.
- The primary speed sensor detects the primary pulley revolution speed and sends a signal to the TCM.


On Board Diagnosis Logic

- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1723" with CONSULT is detected when there is a great difference between the vehicle speed signal and the secondary speed sensor signal.

CAUTION:
One of the "P0720", the "P0715" or the "P0725" is displayed with the DTC at the same time.


Possible Cause

- Harness or connectors (Sensor circuit is open or shorted.)
- Secondary speed sensor
- Primary speed sensor
- Engine speed signal system


DTC Confirmation Procedure


CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch OFF and wait at least 10 seconds before performing the next test.
After the repair, touch "ERASE" on "SELF-DIAG RESULTS" and then perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT

1.Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
2.Start engine and maintain the following conditions for at least 5 consecutive seconds.

VEHICLE SPEED SE: 10 km/h (6 MPH) or more
ACC PEDAL OPEN: More than 1.0/8
RANGE: "D" position
ENG SPEED: 450 rpm or more
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.

3.If DTC is detected, go to .


Diagnosis Procedure


1. CHECK STEP MOTOR FUNCTION

Perform the self-diagnosis check. Trouble Diagnosis.
Is a malfunction in the step motor function indicated in the results?
YES- Repair or replace damaged parts. (Check the step motor function.
NO- GO TO 2.

2. CHECK SECONDARY SPEED SENSOR SYSTEM AND PRIMARY SPEED SENSOR SYSTEM

Check secondary speed sensor system and primary speed sensor system.
OK or NG
OK- GO TO 3.
NG- Repair or replace damaged parts.

3. CHECK ENGINE SPEED SIGNAL SYSTEM

Check engine speed signal system.
OK or NG
OK- GO TO 4.
NG- Repair or replace damaged parts.

4. DETECT MALFUNCTIONING ITEM

Check the following:
- Power supply and ground circuit for TCM.
- The TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK- GO TO 5.
NG- Repair or replace damaged parts.

5. CHECK DTC

Perform Diagnosis Procedure (see below).
OK or NG
OK-INSPECTION END
NG- Replace TCM or transaxle assembly. Service and Repair, Transaxle Assembly.