CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0717,P07BF and P07C0

DTC Code DTC Name
P0717 Input/Turbine Speed Sensor "A" Circuit No Signal
P07BF Input/Turbine Speed Sensor "A" Circuit Low
P07C0 Input/Turbine Speed Sensor "A" Circuit High

DESCRIPTION

The ECM receives a signal from the transmission revolution sensor (NT) installed in the continuously variable transaxle to control the lock-up engagement pressure and forward and reverse clutch pressure.

The transmission revolution sensor (NT) detects the continuously variable transaxle input shaft speed and sends a signal to the ECM.

DTC Code

DTC Detection Condition

  1. Diagnosis Condition

  2. Malfunction Status

  3. Malfunction Time

  4. Other

Trouble Area

P0717

  1. The vehicle is driven with the shift lever in D, the output shaft speed is 300 rpm or more, and no error is detected in the park/neutral position switch assembly.

  2. The speed indicated by the transmission revolution sensor (NT) is less than 300 rpm.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))

  • ECM

P07BF

  1. A transmission revolution sensor (NT) signal malfunction is not detected.

  2. The transmission revolution sensor (NT) output voltage is below 0.1 V.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))

  • ECM

P07C0

  1. A transmission revolution sensor (NT) signal malfunction is not detected.

  2. The transmission revolution sensor (NT) output voltage is higher than 1.9 V.

  3. 2 seconds

  4. 1-trip detection logic

  • Wire harness or connector

  • Continuously variable transaxle assembly (Transmission revolution sensor (NT))

  • ECM

MONITOR DESCRIPTION

The transmission revolution sensor (NT) detects the transaxle input shaft speed. The ECM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input shaft speed) with the transmission revolution sensor (NOUT) (output shaft speed).

When the output shaft speed is higher than the expected value and the input shaft speed is less than 300 rpm while driving with the shift lever in D, the ECM will determine that the transmission revolution sensor (NT) is malfunctioning. The ECM will illuminate the MIL and store the DTC.

WIRING DIAGRAM

C264609E11

CAUTION / NOTICE / HINT

Note:

  • Perform initialization when parts related to the continuously variable transaxle are replaced. (Click here).

  • Check that no DTCs are stored after performing initialization (Click here).

PROCEDURE

  1. READ VALUE USING GTS (SPD (NT) AND NT SENSOR VOLTAGE)

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Powertrain / Engine and ECT / Data List / Primary.

    5. In accordance with the display on the GTS, read the Data List.

      Table 1. Engine and ECT

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      SPD (NT)

      Input turbine speed/

      Min.: 0 rpm

      Max.: 12750 rpm

      • Input turbine speed (NT) equal to engine speed (NE): Lock-up ON (After warming up engine)

      • Input turbine speed (NT) nearly equal to engine speed (NE): Lock-up OFF (Idling with shift lever in P or N)

      • 0 rpm: Vehicle stopped with shift lever in R

      Data is displayed in increments of 50 rpm.

      NT Sensor Voltage

      Input turbine speed (NT) sensor output voltage/

      Min.: 0.000 V

      Max.: 4.999 V

      0.1 to 1.9 V: Engine idling (Vehicle stopped with shift lever in P or N)

      -
      Table 2. Result

      Result

      Proceed to

      Data display is not within Normal Condition range

      A

      Data display is within Normal Condition range

      B

    REPLACE ECMClick here

  2. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)

    1. Disconnect the C104 transmission wire connector.

    2. Disconnect the C111 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C104-8 (NTO) - C111-125 (NTO)

      Always

      Below 1 Ω

      C104-2 (NTB) - C111-126 (NTB)

      Always

      Below 1 Ω

      C111-59 (E1) - Body ground

      Always

      Below 1 Ω

      C104-8 (NTO) or C111-125 (NTO) - Body ground and other terminals

      Always

      10 kΩ or higher

      C104-2 (NTB) or C111-126 (NTB) - Body ground and other terminals

      Always

      10 kΩ or higher

    REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM)

  3. CHECK ECM

    1. U123359E02

      Disconnect the transmission wire connector.

    2. Turn the ignition switch to ON.

    3. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Switch Condition

      Specified Condition

      C104-2 (NTB) - Body ground

      Ignition switch ON

      11 to 14 V
      Table 3. Text in Illustration

      *a

      Front view of wire harness connector

      (to Transmission Wire)

    4. Turn the ignition switch off.

    5. U123360E02

      Disconnect the ECM connector.

    6. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      C111-125 (NTO) - C111-59 (E1)

      Always

      99 to 101 Ω
      Table 4. Text in Illustration

      *a

      Component without harness connected

      (ECM)

    REPLACE ECMClick here

  4. REPLACE CONTINUOUSLY VARIABLE TRANSAXLE ASSEMBLY

    1. Replace the continuously variable transaxle assembly (Click here).

    PERFORM INITIALIZATION

    (Click here)

  5. REPLACE ECM

    1. Replace the ECM (Click here).

    PERFORM INITIALIZATION

    (Click here)

  6. REPLACE ECM

    1. Replace the ECM (Click here).

    PERFORM INITIALIZATION

    (Click here)