Inspection Procedure

HINT:

Read freeze frame data using Techstream or the OBD II scan tool. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can be helpful in determining whether the vehicle was running or stopped, whether the engine was warmed up or not, whether the air-fuel ratio was lean or rich, as well as other data recorded at the time of a malfunction (See DTC CHECK/CLEAR  ).

1. CHECK 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.

        NG: GO TO SPEEDOMETER CIRCUIT  (See HOW TO PROCEED WITH TROUBLESHOOTING )

        OK: Go to Next Step 

2. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
   1. Connect Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the tester on.
   4. Select the following menu items: Powertrain/Engine/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. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE) 
   1. Disconnect the combination meter connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage between the terminal of the combination meter and body ground.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      E2-15 (+S) - Body ground	4.5 to 12 V

   4. Reconnect the combination meter connector.

      NG: Go to step  5

      Fig 1: Identifying E2 Combination Meter Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

4. CHECK COMBINATION METER ASSEMBLY (SPD SIGNAL WAVEFORM) 
   1. Shift the transmission gear selector lever to the neutral position.
   2. Jack up the vehicle.
   3. Turn the ignition switch to ON.
   4. Measure the voltage between the terminal of the combination meter and body ground while the wheel is turned slowly.

      Standard voltage 

      VOLTAGE SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      E2-15 (+S) - 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  (See REMOVAL )

      Fig 2: Identifying Combination Meter Connector With SPD Waveform

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: Go to Next Step 

5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) 
   1. Disconnect the combination meter connector.
   2. Disconnect the ECM connector.
   3. Measure the resistance.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      +S (E2-15) - SPD (A55-8)	Below 1 Ω

      Standard resistance (Check for short) 

      RESISTANCE SPECIFIED CONDITIONS
      
      

      Tester Connection	Specified Condition
      +S (E2-1S) or SPD (A55-8) - Body ground	10 kΩ or higher

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

      NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

      Fig 3: Identifying E2 Combination Meter And A55 ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: REPLACE ECM (See  REMOVAL   )