Speedometer Malfunction [06/2015 - ]: Description
The combination meter assembly receives vehicle speed signals from the brake booster with master cylinder assembly (skid control ECU) via the CAN communication line. The wheel speed sensors output voltages that vary according to the vehicle speed. The brake booster with master cylinder assembly (skid control ECU) supplies power to the wheel speed sensors. The brake booster with master cylinder assembly (skid control ECU) calculates the vehicle speed based on the 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 OPERATION CHECK [06/2015 - 11/2018] , or refer to OPERATION CHECK [11/2018 - ]
- If the vehicle speed sensor circuit has a malfunction, the skid control ECU assembly stores DTCs. Troubleshoot the electronically controlled brake system.