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HOMESERVICE MANUALSSUBARU2014FORESTER 2.5I, ENG CD FB25BA, STANDARD TRANSREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTANTI-THEFT SYSTEMSKEYLESS ACCESS WITH PUSH BUTTON START SYSTEM (DIAGNOSTICS)CONTROL MODULE I/O SIGNALELECTRICAL SPECIFICATIONKEYLESS ACCESS CONTROL MODULE

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard Trans

Keyless Access Control Module

2014 Subaru Forester 2.5i, Eng CD FB25BA, Standard TransSECTION Keyless Access Control Module

Fig 1: Keyless Access Control Module Connector Terminal Identification

Courtesy 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.

Waveform 1

Fig 2: Control Module Connector Waveform 1

Courtesy 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.

Waveform 2

Fig 3: Control Module Connector Waveform 2

Courtesy 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.

Waveform 3

Fig 4: Control Module Connector Waveform 3

Courtesy 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.

Waveform 4

Fig 5: Control Module Connector Waveform 4

Courtesy 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

Waveform 5

Fig 6: Control Module Connector Waveform 5

Courtesy of SUBARU OF AMERICA, INC.

Item	Content
Equipment setting	5 V/DIV, 100 ms/DIV

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

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

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