DTC    B2283    Vehicle Speed Sensor Malfunction

for Preparation Click here


DESCRIPTION

The skid control ECU converts the wheel speed sensor signals into a 4-pulse signal and sends it to the combination meter. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the power management control ECU*1 or power source control ECU*2. The power management control ECU*1 or power source control ECU*2 determines the vehicle speed based on the frequency of this pulse signal.

HINT:
When the power management control ECU*1 or power source control ECU*2 is replaced with a new one and the cable is connected to the negative (-) battery terminal, 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.


DTC No.
DTC Detection Condition
Trouble Area
B2283
Both conditions below are met:
  1. Over-deceleration in vehicle speed
  2. Vehicle speed and engine speed do not match
  1. AM2 No. 2 fuse
  2. MAIN fuse
  3. Combination meter assembly
  4. Power management control ECU*1
  5. Power source control ECU*2
  6. Wire harness or connector
*1: for 1KR-FE and 1NR-FE
*2: for 1ND-TV

WIRING DIAGRAM


B213281E03


INSPECTION PROCEDURE

NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.

1.CHECK COMBINATION METER ASSY (VEHICLE SPEED METER)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Combination Meter /Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Combination Meter 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Vehicle Speed Meter
    		Vehicle speed/Min.
    		Almost same as actual speed (When driving)
    		-

    OK:
    Vehicle speed displayed on the intelligent tester is almost the same as the actual vehicle speed measured using a speedometer tester (calibrated chassis dynamometer).



NG
GO TO METER / GAUGE SYSTEM (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE)
C185500E33

  1. Disconnect the D38 or D73 ECU connector.

  1. Measure the voltage according to the value(s) in the table below.

    1. for 1KR-FE and 1NR-FE

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      D38-2 (AM21) - Body ground
      		Always
      		9.5 to 16 V
      D38-1 (AM22) - Body ground

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)

    2. for 1ND-TV

      Standard Voltage:
      Tester Connection
      		Condition
      		Specified Condition
      D73-2 (AM21) - Body ground
      		Always
      		9.5 to 16 V
      D73-1 (AM22) - Body ground



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.CHECK HARNESS AND CONNECTOR (GROUND)
C185500E34

  1. Disconnect the D38 or D73 ECU connector.

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

    1. for 1KR-FE and 1NR-FE

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D38-6 (GND) - Body ground
      		Always
      		Below 1 Ω
      D38-5 (GND2) - Body ground

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)

    2. for 1ND-TV

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D73-6 (GND) - Body ground
      		Always
      		Below 1 Ω
      D73-5 (GND2) - Body ground



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.CHECK HARNESS AND CONNECTOR (ECU - COMBINATION METER ASSEMBLY)
B211614E02

  1. Disconnect the D38 or D73 ECU connector

  1. Disconnect the D1 combination meter assembly connector

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

    1. for 1KR-FE and 1NR-FE

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D1-16 (+S) - D38-23 (SPD)
      		Always
      		Below 1 Ω
      D38-23 (SPD) - Body ground
      		Always
      		10 kΩ or higher

      Text in Illustration 
      *A
      		for 1KR-FE and 1NR-FE
      *B
      		for 1ND-TV
      *1
      		Rear view of wire harness connector
      (to Power Management Control ECU) (for 1KR-FE and 1NR-FE)
      *2
      		Rear view of wire harness connector
      (to Power Source Control ECU) (for 1ND-TV)
      *3
      		Front view of wire harness connector
      (to Combination Meter Assembly)

    2. for 1ND-TV

      Standard Resistance:
      Tester Connection
      		Condition
      		Specified Condition
      D1-16 (+S) - D73-23 (SPD)
      		Always
      		Below 1 Ω
      D73-23 (SPD) - Body ground
      		Always
      		10 kΩ or higher



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED SIGNAL)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the intelligent tester on.

  1. Enter the following menus: Body / Power Source Control / Data List.

  1. Read the Data List according to the display on the intelligent tester.

    Power Source Control 
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Specified Condition
    Vehicle speed signal
    		Vehicle speed signal/Stop or Run
    		Stop: Vehicle stopped
    Run: Vehicle running
    		-

    OK:
    Stop (vehicle is stopped) and Run (vehicle is running) appear on the screen.

    Result 
    Result
    		Proceed to
    OK
    		A
    NG (for 1KR-FE and 1NR-FE)
    		B
    NG (for 1ND-TV)
    		C



B
Go to step 6

C
Go to step 7
A

GO TO METER / GAUGE SYSTEM (Click here)  

6.INSPECT POWER MANAGEMENT CONTROL ECU


    B211613E05

  1. Reconnect the power management control ECU connectors.

  1. Connect an oscilloscope to terminal D38-23 (SPD) and body ground.

  1. Turn the engine switch on (IG).

  1. Turn the wheel slowly.

Text in Illustration 
*1
Rear view of wire harness connector
(to Power Management Control ECU)


    C192841E01

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

    OK:
    Tester Connection
    		Tool Setting
    		Vehicle Condition
    		Specified Condition
    D38-23 (SPD) - Body ground
    		5 V/DIV., 20 ms./DIV.
    		Driving at approx. 5 km/h (3 mph)
    		Correct waveform as shown in illustration



NG
GO TO METER / GAUGE SYSTEM (Click here)
OK

REPLACE POWER MANAGEMENT CONTROL ECU (Click here)  

7.INSPECT POWER SOURCE CONTROL ECU


    B211613E06

  1. Reconnect the power source control ECU connectors.

  1. Connect an oscilloscope to terminal D73-23 (SPD) and body ground.

  1. Turn the engine switch on (IG).

  1. Turn the wheel slowly.

Text in Illustration 
*1
Rear view of wire harness connector
(to Power Source Control ECU)


    C192841E01

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

    OK:
    Tester Connection
    		Tool Setting
    		Vehicle Condition
    		Specified Condition
    D73-23 (SPD) - Body ground
    		5 V/DIV., 20 ms./DIV.
    		Driving at approx. 5 km/h (3 mph)
    		Correct waveform as shown in illustration



NG
GO TO METER / GAUGE SYSTEM (Click here)
OK

REPLACE POWER SOURCE CONTROL ECU (Click here)