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Home >> Subaru >> 2021 >> WRX Limited, Standard Trans >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Entertainment Systems >> Telematics System (Diagnostics) >> Control Module I/O Signal >> Specification >> Data Communication Module (DCM)
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Data Communication Module (DCM)

G10312051Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Content Measuring condition Standard
A1 - - -
A2 - - -
A3 LED GREEN - -
A4 ↔ Chassis ground i-button i button OFF → ON 1.6 kΩ or more → less than 1 Ω
A5 ↔ Chassis ground SOS button SOS button OFF → ON 1.6 kΩ or more → less than 1 Ω
A6 - - -
A7 CAN L - -
A8 Ignition power supply Ignit ion switch OFF → ON 1 ess than 1 V → 9 - 16 V
A9 - - -
A10 Battery power supply Always 9 - 16 V
A11 - - -
A12 - - -
A13 LED RED - -
A14 ↔ Chassis ground GND Always 1 ess than 1 Ω
A15 - - -
A16 - - -
A17 CAN H - -
A18 Collision detection signal - -
A19 MUTE - -
A20 ↔ Chassis ground ACC Ignit ion switch OFF → ACC ON 1 ess than 1 V → 9 - 16 V
B1 Front speaker input LH - - -
B2 Front speaker output LH - -
B3 Front speaker input RH - -
B4 Front speaker output RH - -
B5 MIC signal OUT - -
B6 MIC signal - -
B7 - - -
B8 MIC 5 V - -
B9 Front speaker input LH + - -
B10 Front speaker output LH + - -
B11 Front speaker input RH + - -
B12 Front speaker output RH + - -
B13 ↔ Chassis ground MIC GND OUT Always L ess than 1 Ω
B14 MIC GND IN - -
B15 - - -
B16 - - -