Code No. P0715: Malfunction of Primary Pulley Speed Sensor

DIAGNOSTIC FUNCTION

CVT-ECU determines that the malfunction is present when the primary pulley speed sensor value changes abruptly or when there is a discrepancy between this sensor and other sensors in sensor reading.

JUDGEMENT CRITERIA

The status with the secondary pulley speed of 500 r/min or more and with the primary pulley speed of 150 r/min or less continues for 5 seconds.
0.1 seconds after the primary pulley speed has dropped abruptly from 1,000 r/min or more to 300 r/min or less
Primary pulley speed sensor is found abnormal by comparing the engine speed with the secondary pulley speed.

PROBABLE CAUSES

Malfunction of primary pulley speed sensor
Damaged wiring harness and connectors
Malfunction of CVT-ECU

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list

Item 01: Primary speed sensor signal (Refer to Service Data Reference Table

Q. Is the check result normal?

	Intermittent malfunction

	Go to Step 2.

STEP 2. Check for open circuit in SGND line between the primary pulley speed sensor connector and the CVT-ECU connector

Q. Is the check result normal?

	Go to Step 3.

	Repair the connector(s) or wiring harness.

STEP 3. Check for open circuit and short to earth in PRMS line between the primary pulley speed sensor connector and the CVT-ECU connector

Q. Is the check result normal?

	Go to Step 4.

	Repair the connector(s) or wiring harness.

STEP 4. Check for open circuit in the power supply line between the CVT control relay and the primary pulley speed sensor connector

Q. Is the check result normal?

	Go to Step 5.

	Repair the connector(s) or wiring harness.

STEP 5. Primary pulley speed sensor check

Visually check the tip of the sensor for foreign materials or damage.

Q. Is the check result normal?

	Go to Step 6.

	Repair.

STEP 6. Diagnosis code recheck after replacing the primary pulley speed sensor

Q. Is the check result normal?

	The inspection is complete.

	Replace CVT-ECU.