LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2017 >> Outback 2.5i Limited >> Repair and Diagnosis >> Accessories & Equipment >> Communication Devices >> Body Control System (Diagnostics) >> Control Module I/O Signal >> Electrical Specification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electrical Specification

Fig 1: Body Control System Control Module Connector Terminals
G11567971Courtesy of SUBARU OF AMERICA, INC.
Terminal No. Content Measuring condition Standard
(i84) No. 1 ←→ Chassis ground Turn output (left rear side) Left turn signal OFF → ON Less than 1 V → 9 - 16 V
(i84) No. 2 - - -
(i84) No. 3 ←→ Chassis ground Shift lock solenoid output (CVT model)
  • IG ON
  • Shift lever P range
  • Stop light switch ON (brake pedal depressed)
 9 - 16 V
  • IG ON
  • Shift lever P range
  • Stop light switch OFF (brake pedal not depressed)
 Less than 1 V
(i84) No. 4 ←→ Chassis ground GND Always Less than 1 Ω
(i84) No. 5 ←→ Chassis ground Turn output (right rear side) Right turn signal OFF → ON Less than 1 V → 9 - 16 V
(i84) No. 6 ←→ Chassis ground Door lock (driver's seat unlock) When UNLOCK signal is output Less than 1 V → 9 - 16 V
(i84) No. 7 - - -
(i84) No. 8 ←→ Chassis ground Luggage/trunk light output Luggage/trunk light OFF → ON Less than 1 V → 9 - 16 V
(i84) No. 9 ←→ Chassis ground Room light output Room light OFF → ON Less than 1 V → 9 - 16 V
(i84) No. 10 ←→ Chassis ground ACC (model with keyless access with push button start system) ACC OFF → ON Less than 1 V → 9 - 16 V
Key-in switch (model without keyless access with push button start system) Ignition key not inserted → inserted Less than 1 V → 9 - 16 V
(i171) No. 1 - - -
(i171) No. 2 Main system CAN (L) - Communication line
(i171) No. 3 ←→ (i171) No. 4 Immobilizer antenna (B) When ignition key inserted Pulse generation
(i171) No. 4 ←→ Chassis ground Immobilizer antenna amplifier GND Always Less than 1 Ω
(i171) No. 5 - - -
(i171) No. 6 ←→ Chassis ground Opener switch (rear gate/trunk) Rear gate/trunk opener switch ON 9 - 16 V → less than 1 V
(i171) No. 7 ←→ (i171) No. 8 - - -
(i171) No. 8 ←→ Chassis ground Illumination sensor GND Always Less than 1 Ω
(i171) No. 9 ←→ Chassis ground Key ring illumination (LED drive) Key ring OFF → ON Less than 1 V → 9 - 16 V
(i171) No. 10 ←→ Chassis ground Map light output Map light OFF → ON Less than 1 V → 9 - 16 V
(i171) No. 11 - - -
(i171) No. 12 ←→ Chassis ground Manual switch (unlock) Door unlock switch OFF → ON 9 - 16 V → less than 1 V
(i171) No. 13 ←→ Chassis ground Door switch (passenger's seat) Passenger's door closed → open 9 - 16 V → less than 1 V
(i171) No. 14 ←→ Chassis ground Door switch (rear seat LH) Rear seat LH door closed → open 9 - 16 V → less than 1 V
(i171) No. 15 ←→ Chassis ground Door switch (rear gate/trunk) Rear gate/trunk closed → open 9 - 16 V → less than 1 V
(i171) No. 16 ←→ Chassis ground Dimmer Hi switch Dimmer switch Hi beam OFF → ON 9 - 16 V → less than 1 V
(i171) No. 17 - - -
(i171) No. 18 ←→ Chassis ground Turn signal right Left turn signal OFF → ON Less than 1 V → 9 - 16 V
(i171) No. 19 ←→ Chassis ground Lighting II switch (redundant circuit) Lighting switch 2 OFF → ON 9 - 16 V → less than 1 V
(i171) No. 20 ←→ Chassis ground Lighting Lo relay output (redundant circuit) Lighting switch 2 OFF → ON 9 - 16 V → less than 1 V
(i171) No. 21 ←→ Chassis ground Power supply for lighting relay (redundant circuit) ACC OFF → ON (with keyless access with push button start system), or ignition key not inserted → inserted (without keyless access with push button start system) Less than 1 V → 9 - 16 V
(i171) No. 22 Main system CAN (H) - Communication line
(i171) No. 23 ←→ (i171) No. 4 Immobilizer antenna (A) When ignition key inserted Pulse generation
(i171) No. 24 ←→ (i171) No. 4 Immobilizer antenna amplifier power supply Ignition switch ON 4.5 V - 5.5 V
(i171) No. 25 ←→ Chassis ground P range switch AT shift lever, other than P range → P range 9 - 16 V → less than 1 V
(i171) No. 26 ←→ Chassis ground Security light When security light is illuminating Pulse generation
(i171) No. 27 ←→ (i171) No. 8 Illumination sensor power supply Ignition switch OFF → ON Less than 1 V → 5 V
(i171) No. 28 ←→ (i171) No. 8 Illumination sensor signal When lighting switch is at AUTO 0 - 5 V
(i171) No. 29 ←→ Chassis ground Pull cup illumination output
  • All doors closed
  • Lighting switch 1 OFF → ON
 Less than 1 V → 9 - 16 V
(i171) No. 30 - - -
(i171) No. 31 - - -
(i171) No. 32 ←→ Chassis ground Manual switch (lock) Door lock switch OFF → ON 9 - 16 V → less than 1 V
(i171) No. 33 ←→ Chassis ground Door switch (driver's seat) Driver's door closed → open 9 - 16 V → less than 1 V
(i171) No. 34 ←→ Chassis ground Door switch (rear seat RH) Rear seat RH door closed → open 9 - 16 V → less than 1 V
(i171) No. 35 ←→ Chassis ground Lighting I switch Lighting switch 1 OFF → ON 9 - 16 V → less than 1 V
(i171) No. 36 ←→ Chassis ground Dimmer Pass switch Dimmer switch Pass OFF → ON 9 - 16 V → less than 1 V
(i171) No. 37 ←→ Chassis ground Turn hazard switch Turn hazard switch OFF → ON 9 - 16 V → less than 1 V
(i171) No. 38 ←→ Chassis ground Turn signal left Turn signal switch left OFF → ON 9 - 16 V → less than 1 V
(i171) No. 39 - - -
(i171) No. 40 - - -
(i81) No. 1 ←→ Chassis ground Rear washer switch Rear washer switch OFF → ON 9 - 16 V → less than 1 V
(i81) No. 2 ←→ Chassis ground Lighting II switch (control) Lighting switch 2 OFF → ON 9 - 16 V → less than 1 V
(i81) No. 3 ←→ Chassis ground Rear wiper switch (INT) Rear wiper switch INT OFF → ON 9 - 16 V → less than 1 V
(i81) No. 4 - - -
(i81) No. 5 - - -
(i81) No. 6 ←→ Chassis ground Door lock status switch passenger's seat Passenger's door lock → unlock 9 - 16 V → less than 1 V
(i81) No. 7 - - -
(i81) No. 8 - - -
(i81) No. 9 ←→ Chassis ground Towing switch Towing switch OFF → ON 9 - 16 V → less than 1 V
(i81) No. 10 Keyless UART - Communication line
(i81) No. 11 - - -
(i81) No. 12 Front washer switch Front washer switch OFF → ON 9 - 16 V → less than 1 V
(i81) No. 13 - - -
(i81) No. 14 - - -
(i81) No. 15 ←→ Chassis ground LANE OFF switch Lane departure warning OFF switch, OFF → ON (when pressed) 9 - 16 V → less than 1 V
(i81) No. 16 - - -
(i81) No. 17 ←→ Chassis ground Front fog light switch Front fog light switch OFF → ON 9 - 16 V → less than 1 V
(i81) No. 18 LIN - Communication line
(i81) No. 19 ←→ Chassis ground Rear wiper switch (ON) Rear wiper switch OFF → ON 9 - 16 V → less than 1 V
(i81) No. 20 ←→ Chassis ground Lighting AUTO switch Lighting switch AUTO OFF → ON 9 - 16 V → less than 1 V
(i81) No. 21 - - -
(i81) No. 22 ←→ Chassis ground Door lock status switch driver's seat Driver's door unlock → lock 9 - 16 V → less than 1 V
(i81) No. 23 ←→ Chassis ground Impact sensor Impact sensor, impact not applied → impact applied Less than 1 V → 9 - 16 V
(i81) No. 24 - - -
(i81) No. 25 - - -
(i81) No. 26 - - -
(i81) No. 27 - - -
(i81) No. 28 - - -
(i81) No. 29 - - -
(i81) No. 30 ←→ Chassis ground PCR OFF switch Pre-collision brake OFF switch, OFF → ON (when pressed) 9 - 16 V → less than 1 V
(i81) No. 31 - - -
(i81) No. 32 - - -
(B280) No. 1 ←→ Chassis ground Front wiper RTN Front wiper stop position → in operation Less than 1 V → 9 - 16 V
(B280) No. 2 ←→ Chassis ground GND Always Less than 1 Ω
(B280) No. 3 ←→ Chassis ground Turn output (left front) Left front turn signal OFF → ON Less than 1 V → 9 - 16 V
(B280) No. 4 ←→ Chassis ground BAT (shift lock, key lock, turn) Always 9 - 16 V
(B280) No. 5 ←→ Chassis ground Key lock solenoid (CVT model without keyless access with push button start system)
  • Ignition key inserted
  • Shift lever, P range → other than P range
 Less than 1 V → 9 - 16 V
(B280) No. 6 - - -
(B280) No. 7 ←→ Chassis ground BAT (control) Always 9 - 16 V
(B280) No. 8 ←→ Chassis ground Turn output (right front) Right front turn signal OFF → ON Less than 1 V → 9 - 16 V
(B281) No. 1 - - -
(B281) No. 2 - - -
(B281) No. 3 ←→ Chassis ground Lighting Hi relay output (left) Dimmer switch Pass OFF → ON Less than 1 V → 9 - 16 V
(B281) No. 4 - - -
(B281) No. 5 ←→ Chassis ground - - -
(B281) No. 6 ←→ Chassis ground DRL cancel During DRL on, dimmer switch Pass OFF → ON 9 - 16 V → less than 1 V
(B281) No. 7 ←→ Chassis ground Lighting 1 relay output Lighting switch 1 OFF → ON 9 - 16 V → less than 1 V
(B281) No. 8 ←→ Chassis ground Rear wiper RTN Rear wiper stop position → in operation Less than 1 V → 9 - 16 V
(B281) No. 9 ←→ Chassis ground Lighting Hi relay output (right) Dimmer switch Pass OFF → ON Less than 1 V → 9 - 16 V
(B281) No. 10 ←→ Chassis ground Answer-back buzzer Answer-back buzzer OFF → ON Less than 1 V → 9 - 16 V
(B281) No. 11 - - -
(B281) No. 12 ←→ Chassis ground Stop light switch Brake pedal, not depressed → depressed Less than 1 V → 9 - 16 V
(B281) No. 13 ←→ Chassis ground MT reverse switch MT shift lever, other than reverse → reverse Less than 1 V → 9 - 16 V
(B281) No. 14 ←→ Chassis ground EGI immobilizer communication Always 1 MΩ or more
(B281) No. 15 Body system CAN (L) - Communication line
(B281) No. 16 - - -
(B281) No. 17 - - -
(B281) No. 18 ←→ Chassis ground Wiper deicer relay output Rear window defogger switch OFF → ON 9 - 16 V → less than 1 V
(B281) No. 19 - - -
(B281) No. 20 ←→ Chassis ground Security output horn Security horn, not operating → operating 9 - 16 V → less than 1 V
(B281) No. 21 ←→ Chassis ground Rear defogger relay output Rear window defogger switch OFF → ON 9 - 16 V → less than 1 V
(B281) No. 22 - - -
(B281) No. 23 ←→ Chassis ground Lighting Lo relay output (control) Lighting switch 2 OFF → ON 9 - 16 V → less than 1 V
(B281) No. 24 ←→ Chassis ground Rear wiper ON Rear wiper switch, not operating → operating Less than 1 V → 9 - 16 V
(B281) No. 25 ←→ Chassis ground Front fog light output Front fog light switch OFF → ON 9 - 16 V → less than 1 V
(B281) No. 26 ←→ Chassis ground Power supply for lighting relay (control) ACC OFF → ON (with keyless access with push button start system), or ignition key not inserted → inserted (without keyless access with push button start system) Less than 1 V → 9 - 16 V
(B281) No. 27 - - -
(B281) No. 28 - - -
(B281) No. 29 - - -
(B281) No. 30 - - -
(B281) No. 31 Body system CAN (H) - Communication line
(B281) No. 32 ←→ Chassis ground BAT (backup) Always 9 - 16 V
scientia non olet · About LEMON Manuals