DTC P0500: Vehicle Speed Sensor "A": Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch on (IG) and turn the Techstream on.
3. Enter the following menus: Chassis / ABS/VSC/TRAC / Trouble Codes.
4. Read the DTCs.

   Result

   Display (DTC output)	Proceed to
   DTC is not output	A
   DTC is output	B

B → GO TO DTC CHART (VEHICLE STABILITY CONTROL SYSTEM) 

A: Go to next step 

1. Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal.

   HINT: 

   • The vehicle speed sensor is operating normally if the speedometer reading is normal.
   • If the speedometer does not operate, check it by following the procedure described in speedometer circuit.
2. Connect the Techstream to the DLC3.
3. Turn the ignition switch on (IG).
4. Turn the Techstream on.
5. Select the following menu items: Powertrain / Engine / Data List / Vehicle Speed.
6. Drive the vehicle.
7. Read the value displayed on the Techstream.

   OK

   Vehicle speeds displayed on Techstream and speedometer display are equal.

NG → See step   3 

OK → CHECK INTERMITTENT PROBLEMS 

1. Remove the combination meter.
   Fig 1: Identifying Combination Meter Assembly Output Waveform

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect the oscilloscope to terminal E1-9 (+S) and body ground.
3. Turn the ignition switch on (IG).
4. Turn the 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.

   TEXT IN ILLUSTRATION
   
   

   *a	Component with harness connected (Combination Meter Assembly)

   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   5 

OK: Go to next step 

1. Disconnect the combination meter connector.
2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Specified Condition
   E1-9 (+S) - D61-18 (SPD)	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Specified Condition
   E1-9 (+S) or D61-18 (SPD) - Body ground	10 kΩ or higher

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

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   6