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: REPLACE COMBINATION METER 

OK: Go to Next Step 

1. Delete the DTC (See DIAGNOSIS SYSTEM  ).
2. Check for the multiplex network communication system DTCs B1210, B1214 and B1215.

   HINT:

   If the DTCs for the multiplex network communication system malfunction are output, inspect those DTCs first (See DIAGNOSTIC TROUBLE CODE CHART  ).

   OK: 

   No DTC is output. 

NG:  GO TO MULTIPLEX COMMUNICATION SYSTEM

OK: Go to Next Step 

1. Check that the connectors are securely connected and the terminals are not deformed or loose.

   OK: 

   The connectors are securely connected and the terminals are not deformed or loose. 

NG: REPAIR OR REPLACE CONNECTORS 

OK: Go to Next Step 

1. Disconnect the ECU connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-6 (GND2) - Body ground	Always	Below 1 Ω

Fig 1: Identifying Terminal GND2 Of J55 Power Source Control ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to Next Step 

1. Disconnect the J34 meter connector.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance 

   STANDARD RESISTANCE SPECIFICATION
   
   

   Tester Connection (Symbols)	Condition	Specified Condition
   J55-19 (SPD) - J34-5 (+S)	Always	Below 1 Ω
   J55-19 (SPD) or J34-5 (+S) - Body ground	Always	10 kΩ or higher

   HINT:

   If the result of the inspection for a short circuit is not as specified, there may be a short in the ECU.

Fig 2: Identifying J34 Meter And J55 Power Source Control ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS, CONNECTOR OR EACH ECU 

OK: Go to Next Step 

1. Reconnect the connectors.
2. Connect Techstream to the DLC3.
3. Turn the engine switch on (IG).
4. Check the DATA LIST for proper functioning of the vehicle speed signal.

   Body: 

   TESTER DISPLAY REFERENCE
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Vehicle Speed Signal	Vehicle speed signal/ STOP or RUN	STOP: Vehicle is stopped RUN: Vehicle is running	-

   OK: 

   STOP (vehicle is stopped) and RUN (vehicle is running) appear on the screen. 

NG: REPLACE COMBINATION METER 

OK: Go to Next Step 

1. Check the input signal waveform.
   1. Reconnect the connectors.
   2. Remove the combination meter assembly with connector (s) still connected.
   3. Connect the oscilloscope to the terminals J55-19 (SPD) and body ground.
   4. Turn the engine switch on (IG).
   5. Turn the wheel slowly.
      Fig 3: Identifying Terminal SPD Of J55 Power Source Control ECU Connector

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   6. Check the signal waveform according to the condition (s) in the table below.
      CONDITION CHART
      
      

      Item	Condition
      Tool setting	5V/DIV., 10ms./DIV.
      Vehicle condition	Driving at approx. 20 km/h (12 mph)

      OK: 

      The waveform is displayed as shown in the illustration. 

      HINT:

      As the vehicle speed increases, the cycle of the signal waveform narrows.

      Fig 4: Waveform Graph

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE COMBINATION METER 

OK: REPLACE POWER SOURCE CONTROL ECU