Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, 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.

      HINT:

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

   NG: CHECK SPEEDOMETER CIRCUIT 

   OK: Go to next step 

2. INSPECT ECM (SPD VOLTAGE) 
   1. Move the shift lever to the neutral position.
   2. Jack up the vehicle.
   3. Turn the ignition switch ON.
   4. Check the voltage between the specified terminals of the E6 and E9 ECM connectors as the wheel is turned slowly.

      Standard 

      TESTER CONNECTION AND SPECIFIED CONDITION
      
      

      Tester Connection	Specified Condition
      E9-8 (SPD) - E6-1 (E1)	Generated intermittently

      Fig 1: Identifying ECM Connector Terminals

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      HINT:

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

   NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (COMBINATION METER ECM) 

   Fig 2: Voltage Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM