Inspection Procedure

1. Drive the vehicle and check if the speedometer in the combination meter functions normally.

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

   HINT:

   The vehicle speed sensor is functioning normally when the indicated speed on the speedometer is accurate.

NG:  GO TO COMBINATION METER SYSTEM

OK: Go to Next Step 

1. Disconnect the navigation ECU connector L16.
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 L16

      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.

      OK: Voltage pulses as shown in the illustration. 

OK : REPLACE NAVIGATION ECU 

Fig 2: Identifying Voltage Pulses

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to Next Step 

1. Disconnect the navigation ECU connector L16 and combination meter connector E2,
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   SPD-E2-15	Ignition switch OFF	Below 1 Ω

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

Fig 3: Checking Harness And Connector (Combination Meter - Navigation ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK: Go to Next Step 

1. Disconnect the navigation ECU connector L16 and combination meter connector E2.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION CHART
   
   

   Tester Connection	Condition	Specified Condition
   SPD - Body ground	Ignition switch OFF	10 kΩ or higher

   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.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU 

Fig 4: Checking Harness And Connector (Combination Meter - Navigation ECU)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : REPLACE COMBINATION METER