DTC B2282-31: Vehicle Speed Signal Circuit Open; DTC B2282-62: Vehicle Speed Signal Compare Failure [11/2023 - ]: Procedure

1. Read the Data List according to the display on the GTS.

   Chassis > Brake/EPB > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Speed	Vehicle speed	Min.: 0.0 km/h (0 mph) Max.: 6553.5 km/h (4072 mph)	Vehicle stopped: 0.0 km/h (0 mph)	When driving at constant speed: No large fluctuations

   Chassis > Brake/EPB > Data List 

   Tester Display
   Vehicle Speed

   OK

   Vehicle speed displayed on the GTS is almost the same as the actual vehicle speed measured using a speedometer tester.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] 

Result: 

OK 

See step  2

1. Read the Data List according to the display on the GTS.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Running Condition (Line)	Vehicle being driven or stopped	Stop or Running	Stop: Vehicle stopped	-

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Vehicle Running Condition (Line)

   OK

   The GTS display changes correctly in response to the vehicle condition.

   Result

   Result	Proceed to
   The value of Vehicle Running Condition (Line) is Stop	A
   The value of Vehicle Running Condition (Line) is not Stop	B

Result: 

B 

See step  4

Result: 

A 

See step  3

1. Read the Data List according to the display on the GTS.

   Body Electrical > Power Source Control > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Running Condition (Line)	Vehicle being driven or stopped	Stop or Running	Running: Vehicle being driven at 5 km/h (3 mph) or more	-

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Vehicle Running Condition (Line)

   OK

   The GTS display changes correctly in response to the vehicle condition.

   Result

   Result	Proceed to
   The value of Vehicle Running Condition (Line) is Running	A
   The value of Vehicle Running Condition (Line) is not Running	B

Result: 

A 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ] 

Result: 

B 

See step  4

Pre-procedure1

1. Disconnect the A39 skid control ECU (brake actuator assembly) connector.
2. Disconnect the A88 certification ECU (smart key ECU assembly) connector.

   Procedure1

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A88-13 (SPD) - A39-18 (SP1)	Always	Below 1 Ω
   A88-13 (SPD) or A39-18 (SP1) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

   Post-procedure1

4. Connect the A88 certification ECU (smart key ECU assembly) connector.
5. Connect the A39 skid control ECU (brake actuator assembly) connector.

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  5

1. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Component with harness connected (Certification ECU (Smart Key ECU Assembly))

   *b

   Waveform 1

   OK

   Tester Connection	Condition	Tool Setting	Specified Condition
   A88-13 (SPD) - H138-29 (E)	Ignition switch ON, vehicle being driven at approx. 5 km/h (3 mph)	5 V/DIV., 20 ms./DIV.	Pulse generation (See waveform 1)

   HINT: 

   The wavelength becomes shorter as the vehicle speed increases.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]