Subaru 2003 LEGACY Service Manual page 17

6. CHECK DOOR SWITCH
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?
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?
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?
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?
KEYLESS ENTRY SYSTEM
Step Value
0 V
10 V
1 MΩ
1 Ω
SL-15
SECURITY AND LOCKS
Yes
Go to step 2. Go to step 3.
The door switch is Go to step 3.
OK.
Go to step 4. Replace the door
switch.
Check the harness Replace the door
for open circuits or switch.
shorts between
the keyless entry
control module
and door switch.
No