CVT

DTC P0715: Malfunction of Primary Pulley Speed Sensor

PRIMARY PULLEY SPEED SENSOR SWITCH SYSTEM CIRCUIT








DIAGNOSTIC FUNCTION
TCM 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.

DESCRIPTIONS OF MONITOR METHODS
^ The status with the secondary pulley speed of 500 r/min or more and with the primary pulley speed of 300 r/min or less continues for 5 seconds.
^ When the primary pulley speed has dropped abruptly from 1,000 r/min or more to 300 r/min or less, and then it keeps 300 r/min or less for 0.5 seconds continuously.

MONITOR EXECUTION
^ transmission range:D
^ Throttle valve opening: 1/8 or more
^ Engine speed: 450 r/min or more

MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
^ P0712, P0713: Malfunction of the transmission fluid temperature sensor
^ P0720: Malfunction of secondary pulley speed sensor
^ P0725: Malfunction of engine speed
^ P0741: Abnormality in lockup function
^ P0746: Abnormality in hydraulic control system function
^ P0841: Abnormality in line pressure sensor function
^ P0868: Secondary pressure drop
^ P1723: Abnormality in speed sensor system function

Sensor (The sensor below is determined to be normal)
^ Transmission fluid temperature sensor
^ Secondary pulley speed sensor

LOGIC FLOW CHARTS (Monitor Sequence)





DTC SET CONDITIONS

Check Conditions
^ Transmission range switch position: D.
^ Secondary pulley speed: 500 r/min or more.
^ Primary pulley speed at 10 millisecond before: 1,000 r/min or more.
^ Throttle position sensor voltage: 1.37 volts or more.
^ Engine speed: 450 r/min or more.
^ Voltage of battery: 9 volts or more.
^ Voltage of battery: 16 volts or less.

Judgment Criteria
^ Primary pulley speed [secondary pulley speed: 500 r/min or more]: 300 r/min or less. (5 seconds)
^ Primary pulley speed [Primary pulley speed at 10 millisecond before: 1,000 r/min or more]: 300 r/min or less. (0.5 second)

OBD-II DRIVE CYCLE PATTERN
transmission range: D (Drive the vehicle for 20 seconds or more while the accelerator opening angle is 20% or more)

PROBABLE CAUSES
^ Malfunction of primary pulley speed sensor
^ Damaged wiring harness and connectors
^ Malfunction of TCM

DIAGNOSTIC PROCEDURE

STEP 1. M.U.T.-III data list
Item 1: Primary speed sensor signal.

Q: Is the check result normal?
YES: Intermittent malfunction
NO: Go to Step 2.

STEP 2. Check the following connector:
^ B-07 Primary pulley speed sensor connector
^ C-40 TCM connector
^ A-09 Intermediate connector
Check the terminals for a contact status problem and internal short circuit.

Q: Is the check result normal?
YES: Go to Step 3.
NO: Repair the defective connector.

STEP 3. Check for open circuit in the wiring harness between the primary pulley speed sensor connector and the TCM connector
Between B-07 primary pulley speed sensor connector (terminal No.3) and C-40 TCM connector (terminal No.48)

Q: Is the check result normal?
YES: Go to Step 4.
NO: Repair the wiring harness.

STEP 4. Check for open circuit and short to ground in wiring harness between the primary pulley speed sensor connector and the TCM connector
Between B-07 primary pulley speed sensor connector (terminal No.2) and C-40 TCM connector (terminal No.37)

Q: Is the check result normal?
YES: Go to Step 5.
NO: Repair the wiring harness.

STEP 5. Check for open circuit in the wiring harness between the CVT control relay and the primary pulley speed sensor connector.
Between A-15X CVT control relay (terminal No.3) and B-07 primary pulley speed sensor connector (terminal No. 1)

Q: Is the check result normal?
YES: Go to Step 6.
NO: Repair the wiring harness.

STEP 6. Primary pulley speed sensor check
Visually check the tip of the sensor for foreign materials or damage.

Q: Is the check result normal?
YES: Go to Step 7.
NO: Repair.

STEP 7. Diagnosis code recheck after replacing the primary pulley speed sensor

Q: Is the check result normal?
YES: The procedure is complete.
NO: Replace TCM.