Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. 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 DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A" ).

   NG: GO TO "MALFUNCTION IN SPEEDOMETER"  

   OK: Go TO NEXT STEP. 

2. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPD) 
   1. Connect the intelligent tester to the DLC3.
   2. Turn the ignition switch ON.
   3. Turn the tester ON.
   4. Select the following menu items: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / VEHICLE SPD.
   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 

   NG: Go TO NEXT STEP. 

3. CHECK COMBINATION METER ASSEMBLY (+S VOLTAGE) 
   1. Disconnect the E19 combination meter connector.
   2. Turn the ignition switch ON.
   3. Measure the voltage between the terminal of the combination meter and the body ground.

      Standard voltage 

      TESTER CONNECTIONS - SPECIFIED CONDITIONS
      
      

      Tester Connections	Specified Conditions
      E19-39 (+S) - Body ground	4.5 to 5.5 V

      Fig 1: Checking Combination Meter Assembly (+S Voltage)

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Reconnect the combination meter connector.

   NG: Go to step   5 

   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 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
      
      

      Tester Connections	Specified Conditions
      E19-39 (+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 

   OK: Go TO NEXT STEP. 

   Fig 2: Checking Combination Meter Assembly (SPD Signal Waveform)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM) 
   1. Disconnect the E19 combination meter connector.
   2. Disconnect the A9 ECM connector.
   3. Check the resistance.

      Standard resistance (check for open) 

      TESTER CONNECTIONS - SPECIFIED CONDITIONS (CHECK FOR OPEN)
      
      

      Tester Connections	Specified Conditions
      E19-39 (+S) - A9-8 (SPD)	Below 1 Ω

      Standard resistance (check for short) 

      TESTER CONNECTIONS - SPECIFIED CONDITIONS (CHECK FOR SHORT)
      
      

      Tester Connections	Specified Conditions
      E19-39 (+S) or A9-8 (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 

   Fig 3: Checking Harness And Connector (Combination Meter Assembly - ECM)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM