AA80F Automatic Transmission: Automatic Transmission System

AA80F AUTOMATIC TRANSMISSION: AUTOMATIC TRANSMISSION SYSTEM: P2765,P2767: Input / Turbine Speed Sensor "B" Circuit
P2767 - Input / Turbine Speed Sensor "B" Circuit No Signal

DESCRIPTION

The speed sensor (NC3) detects the automatic transmission's No. 3 clutch drum rotation speed.





MONITOR DESCRIPTION

The NT terminal of the TCM detects a pulse signal from the speed sensor (NT) (input rpm). The TCM calculates gear shifts comparing the speed sensor (NT) with the speed sensor (SP2).

If the sensor voltage is below 0.1 V or higher than 1.9 V, the TCM interprets this as a fault, illuminates the MIL and stores the DTC.

Also, while the vehicle is operating in 3rd, 4th, 5th, 6th or 7th gear with the shift lever in D, if the input shaft speed is less than 300 rpm*1 although the output shaft speed is more than 1,000 rpm*2, the TCM interprets this as a fault, illuminates the MIL and stores the DTC.

*1: A pulse is not output or is irregularly output.

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

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

P2765:





P2767:





TYPICAL MALFUNCTION THRESHOLDS

P2765:





P2767:





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs AA80F Automatic Transmission System.

HINT
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

1. Warm up the engine.

2. Turn the engine switch off.

3. Connect the Techstream to the DLC3.

4. Turn the engine switch on (IG).

5. Turn the Techstream on.

6. Enter the following menus: Powertrain / ECT / Data List.

7. According to the display on the Techstream, read the Data List.

TCM





HINT
- SPD (NC3) is always 0 while driving: Open or short in the sensor or circuit.
- SPD (NC3) is always more than 0 and less than 300 rpm while driving the vehicle at 50 km/h (31 mph) or more: Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

PROCEDURE

1. CHECK SPEED SENSOR TERMINAL (NC3 TERMINAL)

(a) Disconnect the E50 transmission wire connector.





(b) Turn the engine switch on (IG).

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

Standard Voltage:





(d) Turn the engine switch off.

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

Standard Resistance:





NG -- CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)
OK -- Continue to next step.

2. INSPECT TRANSMISSION WIRE (SPEED SENSOR NC3)

(a) Disconnect the speed sensor (NC3) connector.





(b) Disconnect the E50 transmission wire connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE TRANSMISSION WIRE Removal

OK -- REPLACE SPEED SENSOR Disassembly

3. CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM)

(a) Disconnect the E50 transmission wire connector.





(b) Disconnect the E7 TCM connector.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

4. REPLACE TCM

(a) Replace the TCM Removal.

NEXT -- PERFORM A/T CODE REGISTRATION Registration