If the unit fails to power up after installation, check the RAD NO. 1 (Constant power) and ACC fuses in the engine bay fuse box or the driver-side under-dash panel.
The PZ071’s illumination circuit often uses both ILL+B and ILL- . In many other radios, ILL- is simply chassis ground; here it is a dedicated return that must be connected correctly for the panel lights to dim properly with the dashboard dimmer.
These units were commonly fitted in Toyota vehicles across many markets, including the Toyota Vios (sold as the North American Toyota Yaris), Toyota Altis (2015), Toyota Fortuner, and others. The head units were often manufactured by well‑known OEM audio suppliers like and Fujitsu TEN (e.g., the model numbers PZ071-00017 / FUJITSU TEN 123000-0940A111 ).
Free wiring diagrams are often lower resolution or missing important details. However, you can sometimes find clear photos of the unit’s back label and pin numbers in forums like the12volt.com or otofun.net. For official schematics, Toyota TIS is the most reliable (paid) source. The time you save with an accurate diagram usually far outweighs the small subscription cost.
Blue with Yellow stripe. This wire provides continuous power to maintain radio presets and clock memory. Pin 5 (Right Front Speaker -): Solid Blue wire. Pin 6 (Left Front Speaker -): Solid Violet wire.