Keyless Access Control Module

Fig 1: Keyless Access Control Module Terminals

Courtesy of SUBARU OF AMERICA, INC.

Terminal No.	Terminal symbol	Content
(B572) No. 2	+B	+B
(B572) No. 3	INDS	Start switch indicator (green) output
(B572) No. 5	N-SW	Neutral switch input
(B572) No. 7	STSW	STSW output
(B572) No. 9	IG2D	IG2 relay drive output
(B572) No. 10	CLUT	Clutch switch input
(B572) No. 11	GND	GND
(B572) No. 13	EGIO	Immobilizer communication 1
(B572) No. 17	TACH	Engine speed input
(B572) No. 18	STPI	Stop light switch input
(B573) No. 1	CG8B	Outside rear antenna output -
(B573) No. 2	CLG8	Outside rear antenna output +
(B573) No. 5	RCO	Tuner power supply
(B573) No. 8	CG7B	Inside rear antenna output -
(B573) No. 9	CLG7	Inside rear antenna output +
(B573) No. 15	IDW	ID code box presence judgment terminal
(B573) No. 17	RDA	Tuner reception data input
(B573) No. 19	RSSI	Tuner reception start signal input
(B573) No. 27	TSW5	Rear gate lock request SW input/trunk opener button input
(B573) No. 28	ACCR	ACC cutoff input
(B574) No. 1	VC5	Immobilizer amplifier power supply (start switch)
(B574) No. 2	CG5B	Inside front antenna output -
(B574) No. 3	CLG5	Inside front antenna output +
(B574) No. 4	ACCD	ACC relay drive output
(B574) No. 5	IG	IGN power supply
(B574) No. 6	IG1D	IG1 relay drive output
(B574) No. 7	Code	Immobilizer signal reception (start switch)
(B574) No. 8	TSW2	Passenger's lock sensor signal input
(B574) No. 9	TXCT	Immobilizer signal transmission (start switch)
(B574) No. 10	CG2B	Passenger's antenna output -
(B574) No. 11	CLG2	Passenger's antenna output +
(B574) No. 12	CLG1	Driver's antenna output +
(B574) No. 13	CG1B	Driver's antenna output -
(B574) No. 14	CANH	HS-CAN H
(B574) No. 15	CANL	HS-CAN L
(B574) No. 16	SWIL	Start switch character illumination output
(B574) No. 17	LIN	LIN communication
(B574) No. 18	INDW	Start switch indicator (orange) output
(B574) No. 19	POS1	Driver's sensor drive power supply
(B574) No. 20	TSW1	Driver's lock sensor signal input
(B574) No. 21	POS2	Passenger's sensor drive power supply
(B574) No. 22	SEN1	Driver's unlock sensor signal input
(B574) No. 23	SEN2	Passenger's unlock sensor signal input
(B574) No. 24	AGND	Immobilizer amplifier GND (start switch)
(B574) No. 25	P	Parking position switch input
(B574) No. 26	SLP	Steering lock position input
(B574) No. 27	SPD	Vehicle speed signal input
(B574) No. 28	SSW1	Start switch input 1
(B574) No. 29	SLR+	Steering motor power supply signal output
(B574) No. 30	SSW2	Start switch input 2

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 (GND)	Voltage	Always	9.5 - 16 V
(B572) No. 11 (GND) ←→ Chassis ground	Resistance	Always	Less than 1 Ω

NOTE: If the measured value is out of standard, it is possible that the vehicle has a fault.

Terminal No.	Item	Measuring condition	Standard
(B573) No. 15 (IDW) ←→ Chassis ground (For EK, ER, EN models only)	Continuity	Always	Continuity exists

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	Pulse generation
(B574) No. 15 (CANL) ←→ Chassis ground	Pulse	ACC ON or IGN ON	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 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 (GND)

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 (GND)

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 (GND)

Voltage

IG OFF → ACC ON

1 V or less → 9 - 14 V

(B574) No. 6 (IG1D) ←→ (B572) No. 11 (GND)

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 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 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 (GND)

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 (GND)

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 (GND)

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 (GND)

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 (GND)

Voltage

ACC and IG OFF → ACC or IG ON

9 - 14 V → less than 2 V

(B574) No. 21 (POS2) ←→ (B572) No. 11 (GND)

Voltage

ACC and IG OFF → ACC or IG ON

9 - 14 V → less than 2 V

(B574) No. 24 (AGND) ←→ Chassis ground

Resistance

Always

Less than 1 Ω

(B574) No. 25 (P) ←→ (B572) No. 11 (GND) (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 (GND)

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 (GND)

Voltage

Push button ignition switch released → pressed

11 - 14 V → 1 V or less

(B574) No. 29 (SLR+) ←→ (B572) No. 11 (GND)

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 (GND)

Voltage

Push button ignition switch released → pressed

11 - 14 V → 1 V or less

(B573) No. 1 (CG8B) ←→ (B572) No. 11 (GND)

Pulse

ACC and IG OFF, all doors closed, all doors locked, rear gate opener button OFF → ON

No pulse output → Pulse output detected

(B573) No. 2 (CLG8) ←→ (B572) No. 11 (GND)

Pulse

ACC and IG OFF, all doors closed, all doors locked, rear gate opener button OFF → ON

No pulse output → Pulse output detected

(B573) No. 5 (RCO) ←→ (B572) No. 11 (GND)

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 (GND)

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 (GND)

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 (GND)

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 (GND)

Pulse/voltage

ACC and IG OFF, all doors locked, rear gate lock button OFF → ON

9 V or more → less than 2 V

(B572) No. 9 (IG2D) ←→ (B572) No. 11 (GND)

Voltage

ACC ON → IG ON

1 V or less → 9 - 14 V

(B572) No. 13 (EGIO) ←→ (B574) No. 24 (AGND)

Voltage/pulse

Within 3 seconds after engine has been initially ignited or within 3 seconds after initial IG ON following battery removal and installation

11 to 14 V → pulse generation (waveform 4)

(B574) No. 8 (TSW2) ←→ (B572) No. 11 (GND)

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. 20 (TSW1) ←→ (B572) No. 11 (GND)

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 (GND)

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 (GND)

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 (GND)

Voltage

When illumination of start switch goes off, headlight OFF → ON

Less than 2 V → 9 V or more

(B572) No. 17 (TACH) ←→ Chassis ground

Waveform

While engine idling

Pulse generation (waveform 5)

(B573) No. 28 (ACCR) ←→ (B572) No. 11 (GND)

Voltage

Brake pedal 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 (GND)

Voltage

ACC ON → IG ON

Less than 2 V → 9 V or more

(B573) No. 17 (RDA) ←→ (B572) No. 11 (GND)

Pulse

All doors closed, ACC and IG OFF, access key not in passenger room, touch sensor (lock) OFF → ON

2 V or less → 11 - 14 V → 2 V or less

(B572) No. 7 (STSW) ←→ (B572) No. 11 (GND)

Voltage

Shift lever is in position P or position N and access key is in passenger room. While depressing the brake pedal, press the push button ignition switch. (Engine start)

Less than 2 V → 9 V or more

(B572) No. 3 (INDS) ←→ (B572) No. 11 (GND)

Voltage

Depress the brake pedal.

9 V or more

(B574) No. 18 (INDW) ←→ (B572) No. 11 (GND)

Voltage

With ACC ON or IG ON, brake pedal not depressed.

9 V or more

NOTE:

⁽¹⁾	Remove the access key battery before checking.

Waveform 1

Fig 2: Keyless Access Control Module - 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: Keyless Access Control Module - 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: Keyless Access Control Module - 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: Keyless Access Control Module - Waveform 4

Courtesy of SUBARU OF AMERICA, INC.

Item	Content
Measured terminal	(B572) No. 13 (EGIO) ←→ (B572) No. 11 (GND)
Equipment setting	5 V/DIV, 100 ms/DIV
Measuring condition	Within 3 seconds after engine has been initially ignited or within 3 seconds after initial IG ON following battery removal and installation

Waveform 5

Fig 6: Keyless Access Control Module - Waveform 5

Courtesy of SUBARU OF AMERICA, INC.

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