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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?

	Go to Step 2.

	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.

Refer to

.

Q. Is the check result normal?

	Go to Step 3.

	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?

	Intermittent malfunction

	Replace TCM.