B2282

4GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: B2282: Vehicle Speed Signal Malfunction
B2282 - Vehicle Speed Signal Malfunction

DESCRIPTION

The power source control ECU and the combination meter are connected by a cable and the BEAN. DTC B2282 is output when: 1) the cable information and BEAN information are inconsistent; and 2) a malfunction is detected between the vehicle speed sensor and combination meter.

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
* 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.
* If a short occurs in an ECU, all systems in the diagram below will not operate normally.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK OPERATION OF SPEEDOMETER

(a) 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 -- Continue to next step.

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

(a) Delete the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) 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 Smart Access System With Push-Button Start.

OK:

No DTC is output.

NG -- GO TO MULTIPLEX COMMUNICATION SYSTEM
OK -- Continue to next step.

3. CHECK CONNECTORS

(a) 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 -- Continue to next step.

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

(a) Disconnect the ECU connector.





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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

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

(a) Disconnect the J34 meter connector.





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

Standard resistance:





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

NG -- REPAIR OR REPLACE HARNESS, CONNECTOR OR EACH ECU
OK -- Continue to next step.

6. READ VALUE USING TECHSTREAM (VEHICLE SPEED SIGNAL)

(a) Reconnect the connectors.

(b) Connect Techstream to the DLC3.

(c) Turn the engine switch on (IG).

(d) Check the DATA LIST for proper functioning of the vehicle speed signal.

Body:





OK:

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

NG -- REPLACE COMBINATION METER
OK -- Continue to next step.

7. INSPECT POWER SOURCE CONTROL ECU (SPEED SIGNAL)

(a) 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.









OK:

The waveform is displayed as shown in the illustration.

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

NG -- REPLACE COMBINATION METER

OK -- REPLACE POWER SOURCE CONTROL ECU