PUSH-BUTTON START SYSTEM, Diagnostic DTC:B2282

DTC Code	DTC Name
B2282	Vehicle Speed Signal Malfunction

DESCRIPTION

This DTC is stored when a mismatch between the vehicle speed signal from the direct line sent by the combination meter and the vehicle speed signal sent via CAN communication is detected.

Tech Tips

When the power management control ECU is replaced with a new one and the cable is connected to the negative (-) auxiliary battery terminal, the power source mode changes to on (IG).
When the auxiliary battery cable is disconnected and reconnected, the power source returns to the mode it was in before the auxiliary battery cable was disconnected.

DTC Code	DTC Detection Condition	Trouble Area	DTC Output Confirmation Operation
B2282	Mismatch between the vehicle speed signal from the direct line sent by the combination meter and the vehicle speed signal sent via CAN communication (1-trip detection logic*).	CAN communication system Combination meter assembly Power management control ECU No. 12 junction block 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 that is less than 5 km/h (3 mph) for 20 seconds.

*: Only output while a malfunction is present and the power 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 no vehicle speed, 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 power source mode cannot be turned from on (IG) to off.	-

WIRING DIAGRAM

Tech Tips

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 above will not operate normally.

INSPECTION PROCEDURE

Note

When using the intelligent tester with the power switch off, perform either of the following: 1) Turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the intelligent tester and vehicle begins, or 2) connect the intelligent tester to the vehicle, select the vehicle type under manual mode, and then enter the following menus:

for Power Source Control: Body / Power Source Control / DTC.

for Entry&Start: Body / Entry&Start / DTC.
The push-button start system uses multiplex communication. First perform the inspections in "How to Proceed with Troubleshooting" to confirm that there are no communication malfunctions before proceeding with troubleshooting Click here.
Inspect the fuses for 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.

Tech Tips

Related Data List and Active Test Items
DTC	Data List Item	Active Test Item
B2282	Power Source Control Vehicle Speed Signal Power Supply Condition Combination Meter Vehicle Speed Meter	-

PROCEDURE

CHECK CAN COMMUNICATION SYSTEM
1. Check if CAN communication DTCs are output.
  
  Tech Tips
  
  If any DTCs for the CAN communication system are output, inspect those DTCs first.
  
  OK
  
  CAN communication DTC is not output.
NG
GO TO CAN COMMUNICATION SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) Click here

OK

OK
CAN communication DTC is not output.

CHECK SPEEDOMETER OPERATION

Connect the intelligent tester to the DLC3.
Turn the power switch on (IG).
Turn the intelligent tester on.
Enter the following menus: Body / Combination Meter / Data List.

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, Max.: 255	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).

GO TO METER / GAUGE SYSTEM (Speedometer Malfunction) Click here

READ VALUE USING INTELLIGENT TESTER

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

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

Power Source Control
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
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.

Click here

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK HARNESS AND CONNECTOR (AUXILIARY BATTERY - POWER MANAGEMENT CONTROL ECU)

Disconnect the H3 and H4 connectors from the power management control ECU.

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

Standard Voltage

Tester Connection	Condition	Specified Condition
H3-1 (AM22) - Body ground	Always	9.5 to 16 V
H4-7 (AM21) - Body ground	Always	9.5 to 16 V

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - BODY GROUND)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H3-5 (E01) - Body ground	Always	Below 1 Ω
H3-6 (E1) - Body ground	Always	Below 1 Ω
H4-4 (E12) - Body ground	Always	Below 1 Ω
H4-5 (E02) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - POWER MANAGEMENT CONTROL ECU)

Disconnect the H19 connector from the combination meter assembly.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H3-14 (SPDI) - H19-40 (+S)	Always	Below 1 Ω
H3-14 (SPDI) - Body ground	Always	10 kΩ or higher

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR) Click here

INSPECT COMBINATION METER ASSEMBLY

Text in Illustration

*a
Component with harness connected

(Combination Meter Assembly)

Remove the combination meter assembly Click here.
Reconnect the H19 connector to the combination meter assembly.
Reconnect the H3 connector to the power management control ECU.
Connect an oscilloscope to terminal H19-40 (+S) and body ground.
Turn the power switch on (IG).
Turn wheel slowly.

Text in Illustration
*a	Component with harness connected (Combination Meter Assembly)

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

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

OK
The waveform is similar to that shown in the illustration.

Tech Tips

When the system is functioning normally, one wheel revolution generates 4 pulses. As the vehicle speed increases, the width indicated by (A) in the illustration narrows.

GO TO METER / GAUGE SYSTEM (Speed Signal Circuit) Click here

REPLACE POWER MANAGEMENT CONTROL ECU Click here

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - JUNCTION CONNECTOR)

Disconnect the H117 connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H19-40 (+S) - H117-59	Always	Below 1 Ω
H19-40 (+S) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK HARNESS AND CONNECTOR (POWER MANAGEMENT CONTROL ECU - JUNCTION CONNECTOR)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H3-14 (SPDI) - H117-29	Always	Below 1 Ω
H3-14 (SPDI) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE JUNCTION CONNECTOR