Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 716
SL-13
Keyless Entry System
SECURITY AND LOCKS
3. Keyless Entry System
A: WIRING DIAGRAM
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.
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.
SL-16
Keyless Entry System
SECURITY AND LOCKS
Door lock or unlock does not operate.
NOTE:
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
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