P1723

DTC P1723: Abnormality in Speed Sensor System Function

















DIAGNOSTIC FUNCTION
TCM detects the abnormal wave pattern of the speed sensor signal.

DESCRIPTIONS OF MONITOR METHODS
^ Rotational fluctuation of primary pulley is large (for 1 second).
^ Rotational fluctuation of secondary pulley is large (for 1 second).

MONITOR EXECUTION
^ Continuous

MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
^ P0741: Abnormality in lockup function
^ P0746: Abnormality in hydraulic control system function
^ P0841: Abnormality in line pressure sensor function
^ P0868: Secondary pressure drop

Sensor (The sensor below is determined to be normal)
^ Not applicable

LOGIC FLOW CHARTS (Monitor Sequence)





DTC SET CONDITIONS

Check Conditions
^ Voltage of battery: 9 volts or more.
^ Voltage of battery: 16 volts or less.

Judgment Criteria
^ Noise of primary pulley or primary pulley speed sensor signal: more than 30 r/min. (1 second)
^ Noise of primary pulley or secondary pulley speed sensor signal: more than 30 r/min. (1 second)

OBD-II DRIVE CYCLE PATTERN
Ignition switch : ON (start the engine and keep it for 10 seconds or more)

PROBABLE CAUSES
^ Malfunction of primary pulley speed sensor
^ Malfunction of secondary pulley speed sensor
^ Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. Check the following connector:
^ C-40 TCM connector
^ B-07 Primary pulley speed sensor connector
^ B-113 Secondary pulley speed sensor connector
Check for the connection with terminals.

Q:Is the check result normal?
YES : Go to Step 2.
NO : Repair the defective connector.

STEP 2. Use an oscilloscope to measure the wave patterns of the primary pulley speed sensor and secondary pulley speed sensor. Oscilloscope Patterns and Waveforms

Q:Is the check result normal?
YES : Go to Step 3.
NO : Replace the primary pulley speed sensor or secondary pulley speed sensor.

STEP 3. Symptom recheck after erasing diagnosis code

Q:Is the check result normal?
YES : Intermittent malfunction
NO : Replace TCM.