P1723
DTC P1723: Abnormality in Speed Sensor System FunctionSPEED SENSOR SYSTEM CIRCUIT
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.
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.