Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Manual — part 716

SL-13

Keyless Entry System

SECURITY AND LOCKS

3. Keyless Entry System

A: WIRING DIAGRAM

Refer to “Keyless Entry System” in WI section. <Ref. to WI-159, WIRING DIAGRAM, Keyless Entry System.>

B: ELECTRICAL SPECIFICATION

1. KEYLESS ENTRY CONTROL MODULE

• Model without tire pressure monitoring system

Terminal No.

Item

Measuring condition

Standard

3 (U-ART com.)

—

Cannot be measured

—

4 (+B) ←→ Chassis ground

Voltage

Always

10 — 14 V

7 (GND) ←→ Chassis ground

Resistance Always

Less than 1 Ω

SL-00990

4 3 2 1
8 7 6 5

R80

TO

SL-14

Keyless Entry System

SECURITY AND LOCKS

• Model with tire pressure monitoring system

2. BODY INTEGRATED UNIT

Refer to the Control Module I/O Signal of the LAN SYSTEM (DIAGNOSTICS) section. <Ref. to LAN(diag)-

10, ELECTRICAL SPECIFICATION, Control Module I/O Signal.>

Terminal No.

Item

Measuring condition

Standard

2 ←→ Chassis ground

Voltage

Tire pressure warning light: Not illuminated → Illu-
minated

0 V → 10 — 14 V

3 ←→ Chassis ground

Waveform

Speedometer

Pulse generation

4 (IG) ←→ Chassis ground

Voltage

IG OFF → ON

0 V → 10 — 14 V

5 (GND) ←→ Chassis ground

Resistance Always

Less than 1 Ω

6 (+B) ←→ Chassis ground

Voltage

Always

10 — 14 V

11 (U-ART com.)

—

Cannot be measured

—

12 (SSM communication)

—

Cannot be measured

—

4 3 2 1

10 9 8 7

6

11

12

5

R221

SL-01308

TO

SL-15

Keyless Entry System

SECURITY AND LOCKS

C: INSPECTION

1. SYMPTOM CHART

Symptoms

Repair order

Reference

None of the functions of the keyless
entry system operate.

1. Check the keyless transmitter battery.

<Ref. to SL-17, CHECK KEYLESS
TRANSMITTER BATTERY AND
FUNCTION, INSPECTION, Keyless
Entry System.>

2. Remove and visually inspect the following
fuses.
• No. 3 (in fuse & relay box)
• No. 7 (in fuse & relay box)

If the fuse is blown out, replace the
fuse with a new part.
When there is no defective with the
fuse, check the power supply and
ground circuit. <Ref. to SL-9, CHECK
POWER SUPPLY AND GROUND
CIRCUIT, INSPECTION, Door Lock
Control System.>

3. Check the keyless entry control module.

<Ref. to SL-18, CHECK KEYLESS
ENTRY CONTROL MODULE,
INSPECTION, Keyless Entry Sys-
tem.>

4. Check the power supply and ground circuit for
body integrated unit.

<Ref. to SL-18, CHECK BODY INTE-
GRATED UNIT POWER SUPPLY
AND GROUND CIRCUIT, INSPEC-
TION, Keyless Entry System.>

5. Check the key warning switch.

<Ref. to SL-21, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless
Entry System.>

6. Check the door switch.

<Ref. to SL-19, CHECK DOOR
SWITCH, INSPECTION, Keyless
Entry System.>

7. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

The keyless transmitter cannot be
registered.

1. Check the keyless transmitter battery.

<Ref. to SL-17, CHECK KEYLESS
TRANSMITTER BATTERY AND
FUNCTION, INSPECTION, Keyless
Entry System.>

2. Check the key warning switch.

<Ref. to SL-21, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless
Entry System.>

3. Check the door lock switch signal.

<Ref. to SL-25, CHECK DOOR LOCK
SWITCH, INSPECTION, Keyless
Entry System.>

4. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

SL-16

Keyless Entry System

SECURITY AND LOCKS

Door lock or unlock does not operate.
NOTE:

If the door lock control system does
not operate when using the door lock
switch, check the door lock control
system. <Ref. to SL-8, INSPECTION,
Door Lock Control System.>

1. Check the keyless transmitter battery.

<Ref. to SL-17, CHECK KEYLESS
TRANSMITTER BATTERY AND
FUNCTION, INSPECTION, Keyless
Entry System.>

2. Check the keyless entry control module.

<Ref. to SL-18, CHECK KEYLESS
ENTRY CONTROL MODULE,
INSPECTION, Keyless Entry Sys-
tem.>

3. Check the key warning switch.

<Ref. to SL-21, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless
Entry System.>

4. Check the door switch.

<Ref. to SL-19, CHECK DOOR
SWITCH, INSPECTION, Keyless
Entry System.>

5. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

Trunk lid unlock does not operate. (4
door model)

1. Check the keyless transmitter battery.

<Ref. to SL-17, CHECK KEYLESS
TRANSMITTER BATTERY AND
FUNCTION, INSPECTION, Keyless
Entry System.>

2. Check the keyless entry control module.

<Ref. to SL-18, CHECK KEYLESS
ENTRY CONTROL MODULE,
INSPECTION, Keyless Entry Sys-
tem.>

3. Check the key warning switch.

<Ref. to SL-21, CHECK KEY WARN-
ING SWITCH, INSPECTION, Keyless
Entry System.>

4. Check the trunk lid lock actuator.

<Ref. to SL-23, CHECK TRUNK LID
LOCK ACTUATOR, INSPECTION,
Keyless Entry System.>

5. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

Buzzer and hazard light do not oper-
ate.

1. Check the buzzer operation.

<Ref. to SL-24, CHECK KEYLESS
BUZZER, INSPECTION, Keyless
Entry System.>

2. Check the hazard light operation.

<Ref. to SL-22, CHECK HAZARD
LIGHT OPERATION, INSPECTION,
Keyless Entry System.>

3. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

Room light does not operate.

1. Check the room light operation.

<Ref. to SL-22, CHECK ROOM
LIGHT OPERATION, INSPECTION,
Keyless Entry System.>

2. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

Ignition switch illumination does not
operate.

1. Check the ignition switch illumination.

<Ref. to SL-25, CHECK IGNITION
SWITCH ILLUMINATION, INSPEC-
TION, Keyless Entry System.>

2. Check the body integrated unit.

<Ref. to LAN(diag)-2, Basic Diagnos-
tic Procedure.>

Symptoms

Repair order

Reference