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Keyless Access Control Module

Fig 1: Keyless Access Control Module Connector Terminal Identification
G09485369Courtesy of SUBARU OF AMERICA, INC.

Disconnect the control module connector (B572) before checking the following items.

NOTE: If the measured value is out of standard, it is possible that the vehicle has a fault.
Terminal No. Item Measuring condition Standard
(B572) No. 2 (+B) ←→ (B572) No. 11 (E) Voltage Always 9.5 - 16 V
(B572) No. 11 (E) ←→ Chassis ground Resistance Always Less than 1 Ω

Disconnect the control module connectors (B574) and (B572) before checking the following items.

NOTE: If the measured value is out of standard, it is possible that the vehicle has a fault.
Terminal No. Item Measuring condition Standard
(B574) No. 4 (ACCD) ←→ Chassis ground Resistance Always (20°C) 152.61 - 216.5 Ω
(B572) No. 9 (IG2D) ←→ Chassis ground Resistance Always (20°C) 74.15 - 460.88 Ω
(B574) No. 6 (IG1D) ←→ Chassis ground Resistance Always (20°C) 50.87 - 72.17 Ω
(B572) No. 18 (STP1) ←→ Chassis ground (AT model only) Voltage Brake pedal depressed → released 11 - 14 V → 1 V or less
(B574) No. 25 (P) ←→ Chassis ground (AT model only) Resistance Except for shift positions P → Shift position P 40 kΩ or more → 200 Ω or less
(B574) No. 27 (SPD) ←→ Chassis ground Resistance Always 30 kΩ or more
(B574) No. 28 (SSW1) ←→ Chassis ground Resistance Push button ignition switch pressed → released Less than 1 Ω → 10 kΩ or more
(B574) No. 29 (SLR+) ←→ Chassis ground Resistance Always 10 kΩ or more
(B574) No. 30 (SSW2) ←→ Chassis ground Resistance Push button ignition switch pressed → released Less than 1 Ω → 10 kΩ or more
(B574) No. 17 (LIN) ←→ Chassis ground Continuity Always Continuity does not exist
(B574) No. 14 (CANH) ←→ Chassis ground Pulse ACC ON or IGN ON or power OFF, and open/close the door Pulse generation
(B574) No. 15 (CANL) ←→ Chassis ground Pulse ACC ON or IGN ON or power OFF, and open/close the door Pulse generation

Connect the control module connector before checking the following items.

NOTE: If the measured value is out of standard, it is possible that the keyless access control module has a fault.
Terminal No. Item Measuring condition Standard
(B574) No. 1 (VC5) ←→ (B574) No. 24 (AGND) Voltage 30 seconds or more have passed after the door was opened or closed with IG OFF and the brake pedal (AT model) or clutch pedal (MT model) released. 1 V or less
Waveform Within 30 seconds after the push button ignition switch is pressed with IG OFF and access key not in the passenger room. Waveform 1
(B574) No. 2 (CG5B) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B574) No. 3 (CLG5) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B574) No. 4 (ACCD) ←→ (B572) No. 11 (E) Voltage IG OFF → ACC ON 1 V or less → 9 - 14 V
(B574) No. 6 (IG1D) ←→ (B572) No. 11 (E) Voltage ACC ON → IG ON 1 V or less → 9 - 14 V
(B574) No. 7 (CODE) ←→ (B574) No. 24 (AGND) Voltage 30 seconds or more have passed after the door was opened or closed with IG OFF and the brake pedal (AT model) or clutch pedal (MT model) released. 1 V or less
Waveform Turn the ignition switch to OFF and with the access key near the push button ignition switch, press the push button ignition switch(1) Waveform 2
(B574) No. 9 (TXCT) ←→ (B574) No. 24 (AGND) Voltage 30 seconds or more have passed after the door was opened or closed with IG OFF and the brake pedal (AT model) or clutch pedal (MT model) released. 1 V or less
Waveform Turn the ignition switch to OFF and with the access key near the push button ignition switch, press the push button ignition switch(1) Waveform 3
(B574) No. 10 (CG2B) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, all doors locked by lock operation with wireless remote control, access key not in passenger room No pulse output → Pulse output detected
(B574) No. 11 (CLG2) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, all doors locked by lock operation with wireless remote control, access key not in passenger room No pulse output → Pulse output detected
(B574) No. 12 (CLG1) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, all doors locked by lock operation with wireless remote control, access key not in passenger room No pulse output → Pulse output detected
(B574) No. 13 (CG1B) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, all doors locked by lock operation with wireless remote control, access key not in passenger room No pulse output → Pulse output detected
(B574) No. 19 (POS1) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF → ACC or IG ON 9 - 14 V → less than 2V
(B574) No. 21 (POS2) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF → ACC or IG ON 9 - 14 V → less than 2V
(B574) No. 24 (AGND) ←→ Chassis ground Resistance Always Less than 1 Ω
(B574) No. 25 (P) ←→ (B572) No. 11 (E) (AT model only) Voltage Except for shift positions P → Shift position P 9 - 14 V or more → 1.5 V or less
(B574) No. 26 (SLP) ←→ (B572) No. 11 (E) Voltage With ignition switch OFF and shift position P, Steering lock → Steering unlock 11 - 14 V → 1.2 V or less
(B574) No. 27 (SPD) ←→ Chassis ground Pulse Driving at approx. 5 km/h Pulse generation according to vehicle speed (approx. 5 km/h: 3.54 Hz)
(B574) No. 28 (SSW1) ←→ (B572) No. 11 (E) Voltage Push button ignition switch released → pressed 11 - 14 V → 1 V or less
(B574) No. 29 (SLR+) ←→ (B572) No. 11 (E) Voltage When the following conditions are met, the doors are closed → opened, and steering lock motor is driven
  • Steering lock is unlocked
  • IG OFF
  • Shift position P
 11 - 14 V (Steering lock motor is stopped) → 1 V or less (Steering lock motor is driven)
(B574) No. 30 (SSW2) ←→ (B572) No. 11 (E) Voltage Push button ignition switch released → pressed 11 - 14 V → 1 V or less
(B573) No. 1 (CG8B) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, trunk or rear gate opener button OFF → ON No pulse output → Pulse output detected
(B573) No. 2 (CLG8) ←→ (B572) No. 11 (E) Pulse ACC and IG OFF, all doors closed, trunk or rear gate opener button OFF → ON No pulse output → Pulse output detected
(B573) No. 5 (RCO) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF, access key is locked or unlock switch OFF → ON 1 V or less → 4.5 - 5.5 V
(B573) No. 8 (CG7B) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B573) No. 9 (CLG7) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B573) No. 19 (RSSI) ←→ (B572) No. 11 (E) Voltage All doors closed, all doors locked, access key is locked or unlock switch OFF → ON 11 - 14 V → 2 V or less
(B573) No. 27 (TSW5) ←→ (B572) No. 11 (E) Pulse/voltage ACC and IG OFF, all doors locked, trunk or rear gate lock button OFF → ON 9 V or more → less than 2 V
(B572) No. 9 (IG2D) ←→ (B572) No. 11 (E) Voltage ACC ON → IG ON 1 V or less → 9 - 14 V
(B572) No. 13 (EGIO) ←→ (B572) No. 11 (E) Voltage/pulse IG ON 11 - 14 V → pulse generates temporarily (waveform 4)
(B574) No. 8 (TSW2) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF, all doors closed, all doors locked, access key carried, passenger's seat touch sensor (lock) OFF → ON 9 V or more → less than 2 V (→ 9 V or more)
(B574) No. 18 (TSW1) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF, all doors closed, all doors locked, access key carried, driver's seat touch sensor (lock) OFF → ON 9 V or more → less than 2 V (→ 9 V or more)
(B574) No. 23 (SEN2) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF, all doors closed, all doors locked, access key carried, passenger's seat touch sensor (unlock) OFF → ON 9 V or more → less than 2 V (→ 9 V or more)
(B574) No. 22 (SEN1) ←→ (B572) No. 11 (E) Voltage ACC and IG OFF, all doors closed, all doors locked, access key carried, driver's seat touch sensor (unlock) OFF → ON 9 V or more → less than 2 V (→ 9 V or more)
(B574) No. 16 (SWIL) ←→ (B572) No. 11 (E) Voltage When illumination of start switch goes off, the headlight is OFF → ON, after setting the illumination control to MAX Less than 2 V → 9 V or more
(B574) No. 17 (TACH) ←→ Chassis ground Waveform While engine idling Pulse generation (waveform 5)
(B573) No. 28 (ACCR) ←→ (B572) No. 11 (E) Voltage When brake pedal (AT model) or clutch pedal (MT model) depressed, push button ignition switch pressed (while cranking) → Except when cranking Less than 2 V → 9 V or more
(B572) No. 5 (N-SW) ←→ (B572) No. 11 (E) (AT model only) Voltage Shift position N → other than P or N Less than 2 V → 9 V or more
(B573) No. 10 (CG6B) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B573) No. 11 (CLG6) ←→ (B572) No. 11 (E) Pulse All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON No pulse output → Pulse output detected
(B572) No. 17 (RDA) ←→ (B572) No. 11 (E) Pulse All doors closed, all doors locked, access key is locked or unlock switch OFF → ON 2 V or less → 11 - 14 V → 2 V or less
(B572) No. 7 (STSW) ←→ (B572) No. 11 (E) Voltage Shift lever is in position P or position N and access key is in passenger room. While depressing the brake pedal (AT model) or clutch pedal (MT model), press the push button ignition switch. (Engine start) Less than 2 V → 9 V or more
(B572) No. 3 (INDS) ←→ (B572) No. 11 (E) Voltage Depress the brake pedal (AT model) or clutch pedal (MT model). 9 V or more
(B574) No. 18 (INDW) ←→ (B572) No. 11 (E) Voltage With ACC ON or IG ON, brake pedal (AT model) or clutch pedal (MT model) not depressed 9 V or more
NOTE:
(1) Remove the access key battery before checking.
  1. Waveform 1
    Fig 2: Control Module Connector Waveform 1
    G08585632Courtesy of SUBARU OF AMERICA, INC.
    Item Content
    Measured terminal (B574) No. 1 (VC5) ←→ (B574) No. 24 (AGND)
    Equipment setting 2 V/DIV, 200 ms/DIV
    Measuring condition Within 30 seconds after the push button ignition switch is pressed with IG OFF and access key not in the passenger room.
  2. Waveform 2
    Fig 3: Control Module Connector Waveform 2
    G08585633Courtesy of SUBARU OF AMERICA, INC.
    Item Content
    Measured terminal (B574) No. 7 (CODE) ←→ (B574) No. 24 (AGND)
    Equipment setting 2 V/DIV, 20 ms/DIV
    Measuring condition Turn the ignition switch to OFF and with the access key near the push button ignition switch, press the push button ignition switch. (1)
    NOTE:
    (1) Remove the access key battery before checking.
  3. Waveform 3
    Fig 4: Control Module Connector Waveform 3
    G08585634Courtesy of SUBARU OF AMERICA, INC.
    Item Content
    Measured terminal (B574) No. 9 (TXCT) ←→ (B574) No. 24 (AGND)
    Equipment setting 2 V/DIV, 20 ms/DIV
    Measuring condition Within 30 seconds after the push button ignition switch is pressed with IG OFF and access key not in the passenger room.
  4. Waveform 4
    Fig 5: Control Module Connector Waveform 4
    G09485373Courtesy of SUBARU OF AMERICA, INC.
    Item Content
    Measured terminal (B572) No. 13 (EGIO) ←→ (B572) No. 11 (E)
    Equipment setting 5 V/DIV, 100 ms/DIV
    Measuring condition IG ON
  5. Waveform 5
    Fig 6: Control Module Connector Waveform 5
    G08585636Courtesy of SUBARU OF AMERICA, INC.
    Item Content
    Equipment setting 5 V/DIV, 100 ms/DIV
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