Toyota RAV4 manuals

Toyota Sienna Service Manual: Turbine Speed Sensor Circuit No Signal

Turbine Speed Sensor Circuit No Signal

DESCRIPTION

This sensor detects the rotation speed of the input turbine. By comparing the input turbine speed signal (NT) with the counter gear speed sensor signal (NC), the ECM detects the shift timing of the gears and appropriately controls the engine torque and hydraulic pressure according to various conditions. Thus, providing smooth gear shift.

Turbine Speed Sensor Circuit No Signal

Reference (Using an oscilloscope): Check the waveform between terminals NT+ and NT- of the ECM connector.

Turbine Speed Sensor Circuit No Signal

Standard: Refer to the illustration.

MONITOR DESCRIPTION

The NT terminal of the ECM detects a revolution signal from the speed sensor (NT) (input RPM). The ECM calculates a gearshift comparing the speed sensor (NT) with the speed sensor (NC).

While the vehicle is operating in 2nd, 3rd, 4th or 5th gear in the shift position of D, if the input shaft revolution is less than 300 rpm *1although the output shaft revolution is more than 1,000 rpm *2, the ECM detects the trouble, illuminates the MIL and stores the DTC.

*1: Pulse is not output or is irregularly output.

*2: The vehicle speed is 50 km/h (31 mph) or more.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

WIRING DIAGRAM

INSPECTION PROCEDURE

1 INSPECT SPEED SENSOR INSTALLATION

INSPECT SPEED SENSOR INSTALLATION

(a) Check the speed sensor installation.

OK: The installation bolt is tightened properly and there is no clearance between the sensor and transaxle case.

2 INSPECT SPEED SENSOR (NT)

 INSPECT SPEED SENSOR (NT)

(a) Disconnect the speed sensor connector from the transaxle.

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

Standard resistance

3 CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)

CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)

(a) Connect the speed sensor connector.

(b) Disconnect the ECM connector.

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

Standard resistance

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

Standard resistance (Check for short)

REPLACE ECM

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Other materials:

Disassembly
1. REMOVE REAR DIFFERENTIAL CARRIER COVER (a) Remove the 8 bolts from the carrier cover. (b) Using a brass bar and a hammer, separate the carrier cover from rear differential carrier assembly. (c) Remove the breather plug from the rear differential carrier cover. (d) Remove the bol ...

Diagnostic trouble code chart
HINT: The parameters listed in the chart may not confirm exactly to those read during the DTC check due to the type of instrument or other factors. If a trouble code is displayed during the DTC check in the check mode, check the circuit for the code listed in the table below. For details of ...

How to proceed with troubleshooting
1 VEHICLE BROUGHT INTO A WORKSHOP 2 DIAGNOSTIC QUESTIONING AND SYMPTOM CONFIRMATION Ask the customer about symptoms and confirm malfunctions. 3 CONFIRM THE SYSTEM NORMAL CONDITION 4 CHECK DTC HINT: If the system cannot enter the diagnosis mode, inspect each AVC-LAN communication signal ...

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