Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Vehicle Speed Signal Malfunction (B2282,B2283)

DESCRIPTION

DTC B2282 is stored when the vehicle speed signal sent by the combination meter assembly via direct line and the vehicle speed signal sent via CAN communication do not match.

DTC B2283 is stored when a malfunction in the vehicle speed sensor is detected.

HINT:

When the cable is disconnected and reconnected to the negative (-) battery terminal, the power source mode returns to the state it was in before the cable was disconnected.

DTC Code

DTC Detection Condition

Trouble Area

DTC Output Confirmation Operation

B2282

The vehicle speed signal sent by the combination meter assembly via direct line and the vehicle speed signal sent via CAN communication (1-trip detection logic*) do not match.

  • AM2 NO. 2 fuse
  • Meter/gauge system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector

Drive the vehicle for 20 seconds at a vehicle speed of 25 km/h (16 mph) or more, and then drive the vehicle at a vehicle speed of less than 5 km/h (3 mph) for 20 seconds.

B2283

Either of the of the following malfunctions is detected (a vehicle speed sensor malfunction is detected) (1-trip detection logic*)

  • Vehicle speed signal malfunction detection 1: Excessive deceleration is detected
  • Vehicle speed signal malfunction detection 2: Engine speed linked detection
  • AM2 NO. 2 fuse
  • Meter/gauge system
  • Certification ECU (smart key ECU assembly)
  • Wire harness or connector

Run the engine at an engine speed of 2000 rpm or more for 330 seconds.

  • *: Only detected while a malfunction is present and the engine switch is on (IG)
Vehicle Condition and Fail-safe Function when Malfunction Detected

DTC Code

Vehicle Condition when Malfunction Detected

Fail-safe Function when Malfunction Detected

B2282

  • When the signal from the direct line or CAN communication is malfunctioning and indicates that the vehicle speed is 0 km/h (0 mph), there is no effect on vehicle behavior.
  • When the signal from the direct line or CAN communication is malfunctioning and indicates that the vehicle is moving, the engine switch cannot be turned from on (IG) to off.

-

B2283

  • The power source mode is changed to off (the engine is stopped) by pressing the engine switch while the vehicle is being driven.
  • With the electrical key transmitter sub-assembly in the cabin, even if an engine start operation is performed, the engine does not start.

-

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • When using the Techstream with the engine switch off, connect the Techstream to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the Techstream and the vehicle begins. Then select the vehicle type under manual mode and enter the following menus: Body Electrical / Smart Key. While using the Techstream, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the Techstream and the vehicle.
  • The smart key system (for Start Function) uses a multiplex communication system (LIN communication system) and the CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting.

    Click here Troubleshoot the smart key system (for Start Function) after confirming

    Troubleshoot the smart key system (for Start Function) after confirming that the communication systems are functioning properly.

  • Before replacing the certification ECU (smart key ECU assembly), refer to the smart key system (for Start Function) precaution (See page Inspect the fuses of circuits related to this system before performing ).
  • Inspect the fuses of circuits related to this system before performing the following inspection procedure.
  • After performing repairs, perform the operation that fulfills the DTC output confirmation operation, and then confirm that no DTCs are output again.
Related Data List and Active Test Items

DTC

Data List Item

Active Test Item

B2282

B2283

Power Source Control
  • Vehicle Speed Signal
  • Engine Condition
  • Power Supply Condition
Starting Control
  • Engine Speed
Combination Meter
  • Vehicle Speed Meter

-

PROCEDURE

1.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

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

(c) Turn the Techstream on.

(d) Enter the following menus: Body / Combination Meter / Data List.

(e) Check the Data List for proper functioning of the vehicle speed signal.

Combination Meter

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle Speed Meter

Vehicle speed/Min.: 0 km/h (0 mph), Max.: 255 km/h (158 mph)

Almost same as actual vehicle speed (Speedometer tester)

-

OK:

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

NG

GO TO METER / GAUGE SYSTEM (Speedometer Malfunction)

OK

2.

READ VALUE USING TECHSTREAM

(a) Enter the following menus: Body / Power Source Control / Data List.

(b) Read the Data List according to the display on the Techstream.

Power Source Control

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Vehicle speed signal

Vehicle being driven or stopped/ Stop or Run

Stop: Vehicle stopped

Run: Vehicle being driven at 5 km/h (3 mph) or more

-

OK:

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

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

3.

CHECK HARNESS AND CONNECTOR (POWER SOURCE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR IN CIRCUIT CONNECTED TO POWER SOURCE

OK

4.

CHECK HARNESS AND CONNECTOR (GROUND)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - COMBINATION METER ASSEMBLY)

(a) Disconnect the C29 connector from the certification ECU (smart key ECU assembly).

(b) Disconnect the C9 connector from the combination meter assembly.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C29-5 (SPD) - C9-40 (+S)

Always

Below 1 Ω

C29-5 (SPD) or C9-40 (+S) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Reconnect the C29 certification ECU (smart key ECU assembly) connector.

(b) Reconnect the C9 combination meter assembly connector.

(c) Using an oscilloscope, check the waveform.

Text in Illustration

*a

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

-

-

Tester Connection

Condition

Tool Setting

Specified Condition

C29-5 (SPD) - C29-11 (E)

Engine switch on (IG), vehicle being driven at approx. 5 km/h (3 mph)

5 V/DIV., 20 ms./DIV.

Pulse generation

HINT:

The wavelength becomes shorter as the engine speed increases.

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

GO TO METER / GAUGE SYSTEM (SpeedSignal Circuit)

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