CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM, Diagnostic DTC:P0717, P07BF, 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 to the continuously variable transaxle to control the lock-up engagement pressure and forward and reverse clutch pressure.
The transmission revolution sensor (NT) detects the input turbine speed and sends a signal to the ECM.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory |
|---|---|---|---|---|---|
| P0717 | Input/Turbine Speed Sensor "A" Circuit No Signal | 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
|
|
Comes on | DTC stored |
| P07BF | Input/Turbine Speed Sensor "A" Circuit Low | 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
|
|
Comes on | DTC stored |
| P07C0 | Input/Turbine Speed Sensor "A" Circuit High | 1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other
|
|
Comes on | DTC stored |
MONITOR DESCRIPTION
The transmission revolution sensor (NT) is used to detect the input turbine speed. The ECM determines the necessary gear ratio based on a comparison of the transmission revolution sensor (NT) (input turbine speed) and transmission revolution sensor (NOUT) (output shaft speed) signals.
When the output shaft speed is higher than the expected value and the input turbine 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, illuminate the MIL and store a DTC.
WIRING DIAGRAM
| *a | Transmission Revolution Sensor (NT) |
CAUTION / NOTICE / HINT
Note
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Perform initialization after replacing any parts related to the continuously variable transaxle system.
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Check that no DTCs are stored after performing initialization.
Tech Tips
After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.
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Drive the vehicle for 2 seconds or more at 7 km/h (4 mph) or more with the shift lever in D.
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Check for DTCs again.
PROCEDURE
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READ VALUE USING GTS (SPD (NT) AND NT SENSOR VOLTAGE)
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Connect the GTS to the DLC3.
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Turn the engine switch on (IG).
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Turn the GTS on.
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Enter the following menus: Powertrain / Engine and ECT / Data List.
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According to the display on the GTS, read the Data List.
Powertrain > Engine > Data ListTester Display Measurement Item Range Normal Condition Diagnostic Note SPD (NT) Input turbine speed (NT) min.: 0 rpm
max.: 12750 rpm
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Input turbine speed (NT) equal to engine speed (NE): Lock-up ON (After warming up engine)
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Input turbine speed (NT) nearly equal to engine speed (NE): Lock-up OFF (Idling with shift lever in P or N)
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0 rpm: Vehicle stopped with shift lever in R
Data is displayed in increments of 50 rpm. NT Sensor Voltage Transmission revolution sensor (NT) 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) -
Powertrain > Engine > Data ListTester Display SPD (NT) NT Sensor Voltage Result Result Proceed to Data List value is not normal A Data List value is normal B -
B 
REPLACE ECM Click here
A 
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INSPECT TRANSMISSION REVOLUTION SENSOR (NT)
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Remove the transmission revolution sensor (NT).
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Connect the battery to the transmission revolution sensor (NT) as shown in the illustration.
*1 Battery *2 Ammeter *a Component without harness connected
(Transmission Revolution Sensor (NT))
*b Magnet *c 5 mm or less - - -
Wave a magnetic object left and right 5 mm (0.197 in.) or less from the tip of the transmission revolution sensor (NT) to output a high/low signal while measuring the current.
Note
Make sure to wave the magnetic object during the inspection. The current will not change unless the magnetic object is moved as shown in the illustration.
-
Measure the current according to the value(s) in the table below.
Standard Current Tester Connection Condition Specified Condition 1 (NTO) - 2 (NTB) Low signal 4 to 8 mA 1 (NTO) - 2 (NTB) High signal 12 to 16 mA Result Proceed to OK NG
NG 
REPLACE TRANSMISSION REVOLUTION SENSOR (NT) Click here
OK
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CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM)
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Disconnect the D28 transmission revolution sensor (NT) connector.
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Disconnect the D1 ECM connector.
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Measure the resistance according to the value(s) in the table below.
Standard Resistance Tester Connection Condition Specified Condition D28-1 (NTO) - D1-125 (NTO) Always Below 1 Ω D28-2 (NTB) - D1-126 (NTB) Always Below 1 Ω D28-1 (NTO) or D1-125 (NTO) - Body ground and other terminals Always 10 kΩ or higher D28-2 (NTB) or D1-126 (NTB) - Body ground and other terminals Always 10 kΩ or higher -
Connect the D1 ECM connector.
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Connect the D28 transmission revolution sensor (NT) connector.
Result Proceed to OK NG
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NT) - ECM)
OK
-
-
REPLACE ECM
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Replace the ECM.
Result Proceed to NEXT
NEXT
PERFORM INITIALIZATION Click here
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-
REPLACE ECM
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Replace the ECM.
Result Proceed to NEXT
NEXT
PERFORM INITIALIZATION Click here
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