Dtc B2282 Vehicle Speed Signal Malfunction

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK OPERATION OF SPEEDOMETER

CHECK DTC OUTPUT (MULTIPLEX NETWORK COMMUNICATION SYSTEM (BEAN))

CHECK CONNECTORS

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BODY GROUND)

CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - COMBINATION METER)

READ VALUE OF INTELLIGENT TESTER (VEHICLE SPEED SIGNAL)

INSPECT POWER SOURCE CONTROL ECU (SPEED SIGNAL)

DESCRIPTION

HINT:

When the power source control ECU is replaced with a new one and the negative (-) battery terminal is connected, the power source mode becomes the IG-ON mode. When the battery is removed and reinstalled, the power source mode that was selected when the battery was removed is restored.

WIRING DIAGRAM

HINT:

1. A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
   
2. If a short occurs in an ECU, all systems in the diagram below will not operate normally.
   

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.

1. Delete the DTC (Click here).
   

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 (Click here).

   OK:

   No DTC is output.
   

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.
   

1. Disconnect the ECU connector.
   

2. Measure the resistance according to the value(s) in the table below.
   

   Standard resistance:

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

1. Disconnect the J34 meter connector.
   

2. Measure the resistance according to the value(s) in the table below.
   

   Standard resistance:

   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.

1. Reconnect the connectors.
   

2. Connect the intelligent tester to the DLC3.
   

3. Turn the engine switch on (IG).
   

4. Check the DATA LIST for proper functioning of the vehicle speed signal.
   
   

   Power Source Control:

   Item	Measurement Item/Display (Range)	Normal Condition	Diagnostic Note
   Vehicle Spd Sig	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.
   

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.
      

   
   
   

   6. Check the signal waveform according to the condition(s) in the table below.
      

      Item	Condition
      Tool setting	5 V/DIV., 10 ms./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.