DTC B2282: Vehicle Speed Signal Malfunction; DTC B2283: Vehicle Speed Sensor Malfunction [10/2021 - 10/2022]: Procedure

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

   Body Electrical > Combination Meter > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Vehicle Speed Meter	Vehicle speed	Min.: 0, Max.: 255	Almost same as actual vehicle speed (Speedometer tester)	-

   Body Electrical > Combination Meter > Data List 

   Tester Display
   Vehicle Speed Meter

   HINT: 

   Using a speedometer tester, check the actual vehicle speed and the vehicle speed displayed on the GTS.

   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 METER / GAUGE SYSTEM (Speedometer Malfunction). Refer to  Speedometer Malfunction [12/2019 - ] 

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 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	-

   Body Electrical > Power Source Control > Data List 

   Tester Display
   Vehicle Speed Signal

   OK

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

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO METER / GAUGE SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

NG 

See step  3

1. Disconnect the H21 combination meter assembly connector.
2. Disconnect the H48 certification ECU (smart key ECU assembly) connector.
3. Disconnect the A28 ECM connector.
4. Disconnect the H18 navigation ECU connector.*1
5. Disconnect the H1 radio and display receiver assembly connector.*2
6. Disconnect the H4 radio receiver assembly connector.*3
7. Disconnect the M38*2 or M37*3 stereo component amplifier assembly connector.*4
   1. *1: w/ Navigation System
   2. *2: for 8 Inch Display
   3. *3: for 12.3 Inch Display
   4. *4: for 11 Speakers
8. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   H48-19 (SPD) - H21-6 (+S)	Always	Below 1 Ω
   H48-19 (SPD) or H21-6 (+S) - Other terminals and body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  4

1. Connect the H48 certification ECU (smart key ECU assembly) connector.
2. Connect the H21 combination meter assembly connector.
3. Using an oscilloscope, check the waveform.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

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

   -

   -

   Tester Connection	Condition	Tool Setting	Specified Condition
   H48-19 (SPD) - H48-18 (E)	Ignition switch ON, 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 vehicle speed increases.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to  REMOVAL [12/2019 - 11/2023] 

Result: 

NG 

GO TO METER / GAUGE SYSTEM (Speed Signal Circuit). Refer to  Speed Signal Circuit [12/2019 - 10/2022]