Inspection Procedure

HINT:

Read freeze frame data using the Techstream. Freeze frame data records 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 (See SPEEDOMETER MALFUNCTION ).

   NG: Go TO  SPEEDOMETER MALFUNCTION 

   OK: Go to next step 

2. READ VALUE USING TECHSTREAM (VEHICLE SPEED) 
   1. Connect the Techstream to the DLC3.
   2. Turn the ignition switch to ON.
   3. Turn the Techstream 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 Techstream.

      OK: 

      Vehicle speeds displayed on tester and speedometer display are equal. 

   NG: Go to step 3 

   OK :  CHECK FOR INTERMITTENT PROBLEMS 

3. CHECK COMBINATION METER (+S VOLTAGE) 
   1. Disconnect the combination meter connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage according to the value(s) in the table below.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      C37-20 (+S) - Body ground	Ignition switch ON	4.5 to 5.5 V

   4. Reconnect the combination meter connector.
   Fig 1: Identifying Combination Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG:  Go to step  5

   OK: Go to next step 

4. CHECK COMBINATION METER (SPD SIGNAL WAVEFORM) 
   1. Remove the combination meter.
   2. Connect the combination meter connector.
   3. Move the shift lever to the neutral position.
   4. Jack up the vehicle.
   5. Turn the ignition switch to ON.
   6. Check the voltage between the terminal of the combination meter and the body ground while the wheel is turned slowly.

      Standard voltage 

      VOLTAGE SPECIFICATION
      
      

      Tester Connection	Switch Condition	Specified Condition
      C37-20 (+S) - Body ground	Ignition switch ON (Turn wheel slowly)	Voltage generated intermittently

      HINT:

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

   7. Reinstall the combination meter.
   Fig 2: Identifying Combination Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE COMBINATION METER  (SeeREMOVAL )

   OK: Go to next step 

5. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM) 
   1. Disconnect the combination meter connector.
   2. Disconnect the ECM connector.
   3. Measure the resistance according the value(s) in the table below.

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION - CHECK FOR OPEN
      
      

      Tester Connection	Condition	Specified Condition
      C37-20 (+S) - A36-8 (SPD)	Always	Below 1 Ω

      Standard resistance (Check for open) 

      RESISTANCE SPECIFICATION - CHECK FOR OPEN
      
      

      Tester Connection	Condition	Specified Condition
      C37-20 (+S) or A36-8 (SPD) - Body ground	Always	10 kΩ or higher

   4. Reconnect the combination meter connector.
   5. Reconnect the ECM connector.
   Fig 3: Identifying ECM And Combination Meter Connector Terminals
   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

   OK : REPLACE ECM  (See REMOVAL )