Inspection Procedure

1. Enter the "Display Check Mode (Vehicle Signal Check)" (See DISPLAY CHECK MODE  ).
2. While driving, compare the "Speed" indicator to the reading on the speedometer. Check if these readings are almost the same.

   OK: The readings are almost the same. 

Fig 1: Diagnostic Tool Display - Display Check Mode

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NG: GO TO " VEHICLE SPEED SIGNAL CIRCUIT BETWEEN MULTI-DISPLAY AND COMBINATION METER  " 

OK: Go to Next Step 

1. Disconnect the navigation ECU connector p2.
2. Measure 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 2: Identifying Navigation ECU Connector P2

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   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. 

Fig 3: Measuring Voltage Between Terminal SPD Of Navigation ECU And Body Ground

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OK: REPLACE NAVIGATION ECU 

NG: Go to Next Step 

1. Disconnect the multi-display connector p1 and navigation ECU connector p2.
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 - SPD	Always	Below 1 Ω
   SPD - Body ground	Always	10 kΩ or higher

Fig 4: Identifying Multi-Display Connector P1 And Navigation ECU Connector P2

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NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: REPLACE MULTI-DISPLAY