Speed Signal Circuit (Navigation ECU - Combination Meter Assy)

SPEED SIGNAL CIRCUIT (NAVIGATION ECU - COMBINATION METER ASSEMBLY)

CIRCUIT DESCRIPTION
The navigation ECU receives a vehicle speed signal from the combination meter assembly and information about the GPS antenna, and then adjusts vehicle position.

HINT:
- A voltage of 12 V or 5 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.
- If a short occurs in an ECU, all systems in the diagram below will not operate normally.

Wiring Diagram:

Step 1-2:

Step 3:

Step 4:

INSPECTION PROCEDURE