Inspection Procedure

1. Drive the vehicle and check if the function of the speedometer on 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: CHECK COMBINATION METER 

OK: Go to next step 

1. Disconnect the stereo component amplifier connector P30.
2. Measure the voltage.
   1. Jack up either one of the drive wheels.
   2. Move the shift lever to the neutral position.
   3. Turn the engine switch on (IG).
      Fig 1: Identifying Stereo Component Amplifier Connector P30

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Measure the voltage between terminal SPD of the stereo component amplifier and body ground when the drive wheels are turned slowly.

      OK: 

      Voltage pulses as shown in the illustration. 

   Fig 2: Voltage Pulses For SPD

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: Go to step   3 

OK: REPLACE STEREO COMPONENT AMPLIFIER 

1. Disconnect the stereo component amplifier connector P30 and combination meter connector J34.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE REFERENCE
   
   

   Tester connection	Condition	Specified condition
   SPD - +S	Engine switch off	Below 1 Ω

Fig 3: Identifying Stereo Component Amplifier Connector Terminal P30 And Combination Meter Connector Terminal J34
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the stereo component amplifier connector P30 and combination meter connector J34.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE REFERENCE
   
   

   Tester connection	Condition	Specified condition
   SPD - Body ground	Engine 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 an ECU that is connected to the SPD signal wire.

   Fig 4: Identifying Stereo Component Amplifier Connector Terminal P30 And Combination Meter Connector Terminal J34

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OR CHECK EACH ECU 

OK: REPLACE COMBINATION METER