Inspection Procedure

HINT:

Read freeze frame data using the hand-held 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 if the operation of the speedometer in the combination meter is normal.

      OK: 

      Actual vehicle speed and the speed indicated on the speedometer are the same. 

   HINT:

   The vehicle speed sensor is operating normally if the speedometer reading is normal.

   1. NG: CHECK SPEEDOMETER CIRCUIT (SEE  MALFUNCTION IN SPEEDOMETER  ) 
   2. OK: Go to next step. 
2. INSPECT ECM (SPD VOLTAGE) 
   1. Shift the shift lever to the N position.
   2. Jack up the vehicle.
   3. Turn the ignition switch on (IG).
   4. Check the voltage between the terminals of the B47 and D41 ECM connectors as the wheel is turned slowly.

      OK: 

      TESTER CONNECTION SPECIFIED CONDITION
      
      

      Tester Connections	Specified Conditions
      SPD (D41-8) - E1 (B47-1)	Voltage generated intermittently

      Fig 1: Checking Voltage Between Terminals Of B47 And D41 ECM Connectors

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

      Fig 2: Identifying Turn Wheel Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
   2. OK: REPLACE ECM (SEE  REPLACEMENT  )