DTC B15C2: Speed Signal Malfunction: Description
The navigation receiver assembly receives a vehicle speed signal from the combination meter assembly and information from the navigation antenna assembly, and then adjusts vehicle position information.
The navigation receiver assembly stores this DTC when the difference between the speed information that the navigation antenna assembly receives and the SPD pulse received from the combination meter assembly becomes large.
HINT:
- A voltage of 12 V or 5 V is output from each ECU and input to the combination meter assembly. The signal is changed to a pulse signal at the transistor in the combination meter assembly. Each ECU controls its respective systems based on this pulse signal.
- If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| B15C2 | A difference between the GPS speed and SPD pulse is detected. |
|