Inside this diagnostics we can learn explanation around signal, circuit, combination meter, connector, sensor, and vehicle. The diagnostics gives the reader information such as engine, terminal, vehicle speed, voltage, and meter.
Many things around speed, detection, body panel, malfunction, and speed sensor are described in the diagnostics. These are some excerpt from the diagnostics:
The speed sensor for ABS detects the wheel speed and sends the appropriate signals to the ABS ECU. The ECU converts these signals into a 4–pulse signal and outputs it to the combination meter. After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit inside the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based on the frequency of these pulse signals. When troubleshooting, it is useful for determining whether the vehicle was running or stopped, the engine was warmed up or not, the air–fuel ratio was lean or rich, etc. at the time of the malfunction
Giving more content, this diagnostics contains info regarding combination, ground, vehicle speed sensor, diagnostics, and speedometer.