Subaru Legacy III (2000-2003 year). Manual - part 964

 

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Subaru Legacy III (2000-2003 year). Manual - part 964

 

 

SL-12

SECURITY AND LOCKS

KEYLESS ENTRY SYSTEM

C: INSPECTION

1. SYMPTOM CHART

Symptom

Repair order

Reference

None of the functions of the keyless 
entry system operate.

1. Check the transmitter battery.

<Ref. to SL-13, CHECK TRANSMITTER BAT-
TERY, INSPECTION, Keyless Entry System.> 

2. Check the fuse.

<Ref. to SL-13, CHECK FUSE, INSPECTION, 
Keyless Entry System.> 

3. Check the keyless entry control mod-
ule power supply and ground circuit.

<Ref. to SL-13, CHECK POWER SUPPLY AND 
GROUND CIRCUIT, INSPECTION, Keyless 
Entry System.> 

4. Replace the keyless entry control 
module.

<Ref. to SL-38, Keyless Entry Control Module.> 

Transmitter cannot be registered.

1. Check the transmitter battery.

<Ref. to SL-13, CHECK TRANSMITTER BAT-
TERY, INSPECTION, Keyless Entry System.> 

2. Check the registration connector cir-
cuit.

<Ref. to SL-14, CHECK REGISTRATION CON-
NECTOR CIRCUIT, INSPECTION, Keyless 
Entry System.> 

3. Replace the keyless entry control 
module.

<Ref. to SL-38, Keyless Entry Control Module.> 

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 transmitter battery.

<Ref. to SL-13, CHECK TRANSMITTER BAT-
TERY, INSPECTION, Keyless Entry System.> 

2. Check the key warning switch.

<Ref. to SL-16, CHECK KEY WARNING 
SWITCH, INSPECTION, Keyless Entry Sys-
tem.>
 

3. Check the door switch.

<Ref. to SL-15, CHECK DOOR SWITCH, 
INSPECTION, Keyless Entry System.> 

4. Replace the keyless entry control 
module.

<Ref. to SL-38, Keyless Entry Control Module.> 

Hazard light does not operate.

1. Check the hazard light operation.

<Ref. to SL-17, CHECK HAZARD LIGHT 
OPERATION, INSPECTION, Keyless Entry 
System.> 

2. Replace the keyless entry control 
module.

<Ref. to SL-38, Keyless Entry Control Module.> 

Room light and ignition switch illumi-
nation operation does not activate.

1. Check the room light operation.

<Ref. to SL-17, CHECK ROOM LIGHT OPERA-
TION, INSPECTION, Keyless Entry System.> 

2. Check the ignition switch illumination 
circuit.

<Ref. to SL-18, CHECK IGNITION SWITCH 
ILLUMINATION CIRCUIT, INSPECTION, Key-
less Entry System.>

3. Replace the keyless entry control 
module.

<Ref. to SL-38, Keyless Entry Control Module.> 

SL-13

SECURITY AND LOCKS

KEYLESS ENTRY SYSTEM

2. CHECK TRANSMITTER BATTERY

3. CHECK FUSE

4. CHECK POWER SUPPLY AND GROUND CIRCUIT

Step

Value

Yes

No

1

CHECK TRANSMITTER BATTERY.
1) Remove the battery from the transmitter. 

<Ref. to SL-39, REMOVAL, Keyless Trans-
mitter.>  

2) Check the battery voltage. <Ref. to SL-39, 

INSPECTION, Keyless Transmitter.>  
Does the measured value exceed the spec-
ified value?

2 V

The transmitter 
battery is OK. Fur-
ther inspection is 
necessary, refer to 
“SYMPTOM 
CHART”. <Ref. to 
SL-12, SYMP-
TOM CHART, 
INSPECTION, 
Keyless Entry Sys-
tem.>

Replace the trans-
mitter battery.

Step

Value

Yes

No

1

CHECK FUSE.
Remove and visually check fuse No. 2 (in the 
main fuse box), No. 3 (in the fuse and relay 
box) and SBF-6 (in the main fuse box)
Is the fuse blown?

The fuse is not blown.

Check power sup-
ply and ground cir-
cuit. <Ref. to SL-
13, CHECK 
POWER SUPPLY 
AND GROUND 
CIRCUIT, 
INSPECTION, 
Keyless Entry Sys-
tem.>

Replace the fuse 
with a new one.

Step

Value

Yes

No

1

CHECK POWER SUPPLY.
1) Disconnect the keyless entry control mod-

ule harness connector.

2) Measure the voltage between the harness 

connector terminal and chassis ground.

Connector & terminal

(B176) No. 5, No. 16 (+) — Chassis 
ground (–):

Does the measured value exceed the spec-
ified value?

10 V

Go to step 2.

Check the harness 
for open circuits or 
shorts between 
the keyless entry 
control module 
and fuse.

2

CHECK GROUND CIRCUIT.
Measure the resistance between the harness 
connector terminal and chassis ground.

Connector & terminal

(B176) No. 6, No. 14 — Chassis ground:

Is the measured value less than the specified 
value?

10 

The power supply 
and ground circuit 
are OK.

Repair the har-
ness.

SL-14

SECURITY AND LOCKS

KEYLESS ENTRY SYSTEM

5. CHECK REGISTRATION CONNECTOR CIRCUIT

Step

Value

Yes

No

1

REGISTRATION CONNECTOR INPUT VOLT-
AGE INSPECTION
1) Turn ignition switch ON.
2) Disconnect registration connector.
3) Measure voltage between keyless entry 

control module harness connector and 
chassis ground.

Connector & terminal

(B176) No. 2 (+) — Chassis ground (

):

Does the measured value exceed the spec-
ified value?

10 V

Go to step 2.

Repair harness, 
and (or) connec-
tor.

2

REGISTRATION CONNECTOR INPUT VOLT-
AGE INSPECTION
1) Connect registration connector.
2) Measure voltage between keyless entry 

control module harness connector and 
chassis ground.

Connector & terminal

(B176) No. 2 (+) — Chassis ground (

):

Is the measured value same as the speci-
fied value?

0 V

Registration con-
nector circuit is 
OK.

Repair harness, 
and (or) connec-
tor.

SL-15

SECURITY AND LOCKS

KEYLESS ENTRY SYSTEM

6. CHECK DOOR SWITCH

Step

Value

Yes

No

1

CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the keyless 
entry control module harness connector termi-
nal and chassis ground.

Connector & terminal

Front and rear door:

(B176) No. 3 (+) — Chassis ground (–):

Rear gate:

(B176) No. 4 (+) — Chassis ground (–):

Is the measured value same as the specified 
value when opening either door or rear gate?

0 V

Go to step 2.

Go to step 3.

2

CHECK DOOR SWITCH CIRCUIT.
Measure the voltage between the keyless 
entry control module harness connector termi-
nal and chassis ground.

Connector & terminal

Front and rear door:

(B176) No. 3 (+) — chassis ground (–):

Rear gate:

(B176) No. 4 (+) — chassis ground (–):

Is the measured value less than the specified 
value when all doors and rear gate are closed?

10 V

The door switch is 
OK.

Go to step 3.

3

CHECK DOOR SWITCH.
1) Disconnect the door switch harness con-

nector.

2) Measure the resistance between the door 

switch terminals.

Terminal

Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:

Does the measured value exceed the spec-
ified value when door switch is pressed?

1 M

Go to step 4.

Replace the door 
switch.

4

CHECK DOOR SWITCH.
Measure the resistance between the door 
switch terminals.

Terminal

Door switch No. 1 — No. 3:
Rear gate latch switch No. 1 — No. 2:

Is the measured value less than the specified 
value when door switch is released?

Check the harness 
for open circuits or 
shorts between 
the keyless entry 
control module 
and door switch.

Replace the door 
switch.

 

 

 

 

 

 

 

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