DTC    P0500    Vehicle Speed Sensor "A"

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DESCRIPTION

The speed sensor SP2 detects the rotation speed of the transmission output shaft and sends signals to the ECM. The ECM determines the vehicle speed based on these signals. An AC voltage is generated in the speed sensor SP2 coil as the parking gear mounted on the rear planetary gear assembly rotates, and this voltage is sent to the ECM. The parking gear on the rear planetary gear is used as the timing rotor for this sensor.
The gear shift point and lock-up timing are controlled by the ECM based on the signals from this vehicle speed sensor and the throttle position sensor signal.

C110820E02


DTC No.
DTC Detection Condition
Trouble Area
P0500
No speed sensor signal to ECM under following conditions: (1-trip detection logic)
(a) Park/neutral position switch is OFF
(b) Vehicle is being driven
  1. Open or short in speed sensor (SP2) circuit
  2. Speed sensor (SP2)
  3. Automatic transmission assembly
  4. ECM

  1. Reference (Using an oscilloscope):
    Check the waveform between terminals SP2+ and SP2- of the ECM connector.
    G020664E02

    Standard:
    Refer to the illustration.
    Terminal
    		SP2+ - SP2-
    Tool setting
    		2 V/DIV, 20ms/DIV
    Vehicle condition
    		Vehicle speed 20 km/h (12 mph)


MONITOR DESCRIPTION

The output speed sensor SP2 monitors the output shaft speed. The ECM controls the gearshift point and the lock up timing based on the signals from the output speed sensor SP2 and throttle position sensor.
If the ECM detects no signal from the output shaft speed sensor SP2 even while the vehicle is moving, it will conclude that is a malfunction of the output speed sensor SP2. The ECM will illuminate the MIL and set a DTC.

WIRING DIAGRAM


G031763E03


INSPECTION PROCEDURE


DATA LIST

HINT:
Using the intelligent tester Data List allows switch, sensor, actuator and other item values to be read without removing any parts. Reading the Data List early in troubleshooting is one way to shorten labor 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 intelligent tester to the DLC3.

  4. Turn the engine switch on (IG) position.

  5. Turn on the tester.

  6. Select the item "Enter / Power train / ECT/ Data List".

  7. Follow the instructions on the tester and read the Data List.


Item
Measurement Item/
Range (display
Normal Condition
SPD (SP2)
Output shaft Speed/ min.: 0 km/h (0 mph)
max.: 255 km/h (158 mph)
Vehicle stopped: 0 km/h (0 mph)

HINT:
Equal to vehicle speed

HINT:
  1. SPD (SP2) is always 0 while driving:
    Open or short in the sensor or circuit.
  2. The SPD (SP2) value displayed on the tester is much lower than the actual vehicle speed:
    Sensor trouble, improper installation, or intermittent connection trouble of the circuit.

1.INSPECT SPEED SENSOR INSTALLATION


    BR03795E16

  1. Check the speed sensor (SP2) installation.

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



NG
REPLACE SPEED SENSOR (SP2)
OK


2.INSPECT SPEED SENSOR (SP2)


    C110343E03

  1. Disconnect the speed sensor connector from the transmission.

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

    Resistance:
    Tester Connection
    		Specified Condition
    20°C (68°F)
    1 - 2
    		560 to 680 Ω



NG
REPLACE SPEED SENSOR (SP2)
OK


3.CHECK HARNESS AND CONNECTOR (SPEED SENSOR - ECM)


    C106186E12

  1. Connect the speed sensor connector.

  1. Disconnect the ECM connector.

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

    Resistance:
    Tester Connection
    		Specified Condition
    20°C (68°F)
    E7 - 23 (SP2+) - E7 - 22 (SP2-)
    		560 to 680 Ω

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

    Resistance (Check for short):
    Tester Connection
    		Specified Condition
    E7 - 23 (SP2+) - Body ground
    		10 kΩ or higher
    E7 - 22 (SP2-) - Body ground
    		↑



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE ECM