DTC P0725: Malfunction of Engine Speed

TCM detects malfunction of engine speed received from the ECM by comparing the primary pulley speed with the secondary pulley speed.

Primary pulley speed of 1,000 r/min or more and with the engine speed of 450 r/min or less
When the differences in rotation between the engine and the primary pulley, and between the engine and the secondary pulley are 1,000r/min or more during direct-coupled operating
CAN communication error occurs between ECM and TCM.

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)

Sensor (The sensor below is determined to be normal)

Check Conditions

Transmission range switch position: D.
Throttle position sensor voltage: 1.37 volts or more.
Primary pulley speed: 1,000 r/min or more.
The absolute value of the Primary pulley speed - secondary pulley speed: 1,000 r/min or less.
Voltage of battery: 9 volts or more.
Voltage of battery: 16 volts or less.

Judgment Criteria

Engine revolution [primary pulley speed: 1,000 r/min or more]: less than 450 r/min.
The difference of engine speed and primary speed: more than 1,000 r/min. (5 seconds)
The difference of engine speed and secondary speed: more than 1,000 r/min. (5 seconds)

transmission range: D (Drive the vehicle for 10 seconds or more while the accelerator opening angle is 20% or more)

DIAGNOSTIC PROCEDURE

Use M.U.T.-III to perform the CAN bus diagnosis.

	Go to Step 2.

	Go to "CAN Troubleshooting."

Check if the engine-related diagnosis code is set.

	Go to Step 3.

	Go to "Engine Troubleshooting."

	Intermittent malfunction

	Replace TCM.