Inspection Procedure

HINT:

Read freeze frame data using a Techstream. Freeze frame data record the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data, from the time the malfunction occurred.

1. CHECK OPERATION OF SPEEDOMETER 
   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 Malfunction for Hatchback (See SPEEDOMETER MALFUNCTION ) or Sedan (See SPEEDOMETER MALFUNCTION ).

   NG:  GO TO SPEEDOMETER MALFUNCTION (Sedan) or SPEEDOMETER MALFUNCTION (Hatchback)

   OK: Go to Next Step 

2. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
   1. Connect a Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester ON.
   4. Select the following menu items: Powertrain / Engine and ECT / Data List / All Data / Vehicle Speed.
   5. Drive the vehicle.
   6. Read the value displayed on the tester.

      OK: Vehicle speeds displayed on tester and speedometer display are equal. 

   OK: CHECK FOR INTERMITTENT PROBLEMS (See  CHECK FOR INTERMITTENT PROBLEMS   ) 

   NG: Go to Next Step 

3. INSPECT COMBINATION METER ASSEMBLY (+S VOLTAGE) 
   1. Disconnect the D1 combination meter connector.
   Fig 1: Disconnecting D1 Combination Meter Connector
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Turn the ignition switch to ON.
   3. Measure the voltage between the terminal of the combination meter and the body ground.

      Standard voltage 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      +S (D1-16) - Body ground	4.5 to 5.5 V

   4. Reconnect the combination meter connector.

   NG:  Go to step  5

   OK: Go to Next Step 

4. INSPECT COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) 
   Fig 2: Identifying Combination Meter Assembly (SPD Signal Waveform)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Shift the transmission gear selector lever to the neutral position.
   2. Jack up the vehicle.
   3. Turn the ignition switch to ON.
   4. Check the voltage between the terminal of the combination meter and the body ground while the wheel is turned slowly.

      Standard voltage 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      +S (D1-16) - Body ground	Voltage generated intermittently

      HINT:

      The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.

   NG: REPLACE COMBINATION METER ASSEMBLY 

   OK: Go to Next Step 

5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) 
   1. Disconnect the D1 combination meter connector.
   Fig 3: Identifying Combination Meter Connector And ECM Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   2. Disconnect the A21 ECM connector.
   3. Check the resistance.

      Standard resistance (check for open) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      +S (D1-16) - SPD (A21-8)	Below 1 Ω

      Standard resistance (check for short) 

      TESTER CONNECTIONS SPECIFIED CONDITIONS CHART
      
      

      Tester Connections	Specified Conditions
      +S (D1-16) or SPD (A21-8) - 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: REPLACE ECM (See  REMOVAL   )