DTC P0500: Vehicle Speed Sensor "A": Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Engine and ECT / Data List / Vehicle Speed.
5. Drive the vehicle.
6. Read the value displayed on the Techstream.

   OK

   Vehicle speeds displayed on the Techstream and speedometer display are equal.

NG → See step   2 

OK → See step   4 

1. Check the output waveform.
   Fig 1: Inspecting Combination Meter Assembly (Output Waveform)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Remove the combination meter assembly with the connector(s) still connected.
   2. Connect an oscilloscope to terminals E55-36 (+S) and body ground.
   3. Turn the ignition switch to ON.
   4. Turn a wheel slowly.
   5. Check the signal waveform according to the condition(s) in the table below.

      Item	Condition
      Tool setting	5 V/DIV., 20 ms/DIV.
      Vehicle condition	Driving at approx. 20 km/h (12 mph)

      OK

      The waveform is displayed as shown in the illustration above.

      HINT: 

      When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

NG → See step   6 

OK: Go to next step 

1. Disconnect the ECM connector.
   Fig 2: Identifying Combination Meter Connector And ECM Connector

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the combination meter connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance (Check for Open)

   Tester Connection	Condition	Specified Condition
   E55-36 (+S) - A37-8 (SPD)	Always	Below 1 Ω

4. Reconnect the ECM connector.
5. Reconnect the combination meter connector.

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5