Speedometer Malfunction [11/2015 - 12/2018]: Description

The combination meter assembly (meter circuit plate) receives vehicle speed signals from the skid control ECU (brake booster with master cylinder assembly) via CAN communication. The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU (brake booster with master cylinder assembly). The skid control ECU (brake booster with master cylinder assembly) supplies power to the vehicle speed sensor. The skid control ECU (brake booster with master cylinder assembly) detects vehicle speed signals based on pulses of the voltage.

HINT: 

• Factors that affect the indicated vehicle speed include the tire size, tire inflation, and tire wear. The speed indicated on the speedometer has an allowable margin of error. This can be tested using the Techstream. For details about testing and the margin of error, see the reference chart.

  Refer to ON-VEHICLE INSPECTION [11/2015 - 12/2018] 

• If the vehicle speed sensor circuit has a malfunction, the skid control ECU (brake booster with master cylinder assembly) stores DTCs. Troubleshoot the electronically controlled brake system.

  Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2015 - 12/2018]