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.

NG: GO TO  COMBINATION METER 

OK: GO TO NEXT STEP 

1. Disconnect the navigation ECU connector M16.
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 on (IG).
      Fig 1: Disconnecting Navigation ECU Connector M16

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Measure the voltage between terminal SPD of the navigation ECU and body ground when the drive wheels are turned slowly.
      Fig 2: View Of Voltage Pulses/Blinking Pattern

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      OK: 

      Voltage pulses as shown in  Fig 2 . 

OK: REPLACE NAVIGATION ECU 

NG: GO TO NEXT STEP 

1. Disconnect the navigation ECU connector M16 and combination meter connector E2.
   Fig 3: Disconnecting Navigation ECU Connector M16

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   SPD - E2-15	Ignition switch OFF	Below 1

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO NEXT STEP 

1. Disconnect the navigation ECU connector M16 and combination meter connector E2.
Fig 4: Disconnecting Combination Meter Connector E2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Measure the resistance according to the value(s) in the table below.
   STANDARD RESISTANCE SPECIFIED CONDITION
   
   

   Tester connection	Condition	Specified condition
   SPD - Body ground	Ignition switch OFF	10 k or higher

   HINT:

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

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU 

OK: REPLACE COMBINATION METER