Subaru BRZ (ZC6) Electrical Wiring Diagram

This page shows the electrical schematic diagram for the Subaru BRZ (ZC6). The diagram includes the main components and connections of the vehicle's electrical system, such as:

Engine Control Unit (ECU)

Battery and Charging System

Ignition System

Lighting and Body Electrical

Fuses and Relays

Connectors and Grounding Points

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1. Battery and charging system problems

Symptoms:

Fast battery discharge

Difficulty starting the engine

Periodic flashing of the charging indicator

Possible causes:

✔️ Battery wear (usually after 3-5 years)

✔️ Generator or generator belt problems

✔️ Current leaks in the on-board network (e.g. faulty multimedia module)

Solution:

Check the battery charge and terminal condition

Measure the generator voltage (normal: 13.5-14.7 V with the engine running)

Find the current leak with a multimeter

2. Ignition system malfunctions

Symptoms:

Misfires, loss of power

Engine misfires or does not start

Errors P0300–P0304 (misfires)

Possible causes:

✔️ Coil problems ignition

✔️ Oxidation of contacts in coil connectors

✔️ Blown ignition fuses

Solution:

Check the condition of the coils and replace if necessary

Clean the connectors and treat them with dielectric grease

Check the EFI MAIN and IGN fuses

3. Malfunctions in multimedia and lighting

Symptoms:

The multimedia screen does not turn on

The steering wheel buttons or dashboard do not work

The side lights or brake lights do not light

Possible causes:

✔️ Malfunction of the fuse box

✔️ Broken or damaged wiring (especially in places where they bend)

✔️ Problems with the CAN bus (if several systems are affected at once)

Solution:

Check the fuses in the cabin and under the hood

Test the multimedia and button connectors

If there are CAN errors, read the codes with an OBD2 scanner

4. Sensor and control systems

Symptoms:

Check Engine, ABS, VSC lights up

Errors related to sensors (e.g. oxygen sensor, throttle position sensor)

Possible causes:

✔️ Oxidation of sensor connectors (especially after washing or rain)

✔️ Frayed wiring (e.g. near the engine)

✔️ Malfunction of the sensors themselves

Solution:

Run OBD2 diagnostics and decipher errors

Check and clean sensor contacts

Replace faulty elements if necessary

5. Problems with the start-stop system and central lock

Symptoms:

The car does not respond to the Start/Stop button

Doors do not open from the button on the handle

The key is no longer detected by the system

Possible causes:

✔️ Dead battery in the key

✔️ Malfunction of the keyless entry antenna

✔️ Problems with the BCM module (Body Control Module)

Solution:

Replace the battery in the key (CR2032)

Reprogram the key using a dealer scanner

Check the power supply to the BCM module and its fuses