Inspection Procedure

HINT:

Read freeze frame data using the intelligent tester. Freeze frame data records the engine conditions when malfunctions are 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 E7 and E8 ECM connectors as the wheel is turned slowly.

   Standard 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Specified Condition
   E8-8 (SPD) - E7-1 (E1)	Generated intermittently

   Fig 1: Inspecting ECM (SPD Voltage)

   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: Identifying Voltage Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   OK: REPLACE ECM