Inspection Procedure

1. Drive the vehicle and check if the function 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 functioning normally when the indication on the speedometer is normal.

1. NG: CHECK COMBINATION METER ASSY (SEE  PROBLEM SYMPTOMS TABLE  ) 
2. OK: GO TO NEXT STEP 

1. Disconnect the radio and navigation assy connector R12.
2. Measure voltage.
   1. Jack up either one of the drive wheels.
   2. Move the shift lever to the neutral position.
   3. Turn the ignition switch to the ON position.
   4. Measure the voltage between terminal SPD of the radio and navigation assy and body ground when the drive wheels are turned slowly.

   OK: Voltage pulses as shown below. 

Fig 1: Disconnecting Radio & Navigation Assy Connector R12

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 2: Identifying Voltage Pulses

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. OK: REPLACE RADIO AND NAVIGATION ASSY (SEE  RADIO RECEIVER ASSY  ) 
2. NG: GO TO NEXT STEP 

1. Disconnect the radio and navigation assy connector R12 and combination meter assy connector C10.
2. Measure the resistance according to the value(s) in COMBINATION METER ASSY - RADIO AND NAVIGATION ASSY RESISTANCE .

   Standard: 

Fig 3: Disconnecting Radio And Navigation Assy Connector R12

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 4: Disconnecting Combination Meter Assy Connector C10

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
2. OK: GO TO NEXT STEP 

1. Disconnect the radio and navigation assy connector R12 and combination meter assy connector C10.
2. Measure the resistance according to the value(s) in COMBINATION METER ASSY - RADIO AND NAVIGATION ASSY RESISTANCE 

   Standard: 

HINT:

If the resistance between terminal SPD and body ground is less than 10 kΩ, there may be a short in a wire harness, connector, or ECU.

Fig 5: Disconnecting Radio And Navigation Assy Connector R12

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 6: Disconnecting Combination Meter Assy Connector C10

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR CHECK EACH ECU 
2. OK: REPLACE COMBINATION METER ASSY (SEE  COMBINATION METER ASSY  )