2019 Subaru WRX BaseFACTORY OEM SERVICE PROCEDURE

Electrical Specification

G12452019Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Content Measuring condition Standard
1 ↔ Chassis ground Front camera GND Always Less than 1 Ξ©
2 ↔ Chassis ground Front camera connection detection When not connected Less than 0 V
3 ↔ Chassis ground Front camera image input Cannot be measured -
4 ↔ Chassis ground Power supply for front camera IG OFF β†’ ON Β 
5 - - -
6 ↔ Chassis ground Side camera GND Always Less than 1 Ξ©
7 ↔ Chassis ground Side camera connection detection When not connected Less than 0 V
8 ↔ Chassis ground Side camera image input Cannot be measured -
9 ↔ Chassis ground Power supply for side camera IG OFF β†’ ON Β 
10 ↔ Chassis ground Accessory output request Cannot be measured -
11 - - -
12 ↔ Chassis ground UART (meter) Cannot be measured -
13 - - -
14 - - -
15 ↔ Chassis ground MFD SW+ Always -
16 - - -
17 ↔ Chassis ground Passenger's airbag ON Passenger's airbag ON indicator (when illuminating) -
18 ↔ Chassis ground Passenger's airbag OFF Passenger's airbag OFF indicator (when illuminating) -
19 ↔ Chassis ground CAN communication line (+) Cannot be measured -
20 ↔ Chassis ground CAN communication line (-) Cannot be measured -
21 ↔ Chassis ground GND Always Less than 1 Ξ©
22 - - -
23 ↔ Chassis ground Ignition power supply IG OFF β†’ ON 0 V β†’ 10 - 14 V
24 ↔ Chassis ground Battery power supply Always 10 - 14 V
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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