Subaru 2009 IMPREZA, Service Manual

Page: 3122 / 3619

SL-18
Keyless Entry System
SECURITY AND LOCKS
3. CHECK KEYLESS ENTRY CONTROL MODULE
4. CHECK BODY INTEGRATED UNIT POWER SUPPLY AND GROUND CIRCUIT
Refer to the INSPECTION of POWER SUPPLY AND GROUND CIRCUIT of the Door Lock Control System
for detailed procedures. <Ref. to SL-9, CHECK POWER SUPPLY AND GROUND CIRCUIT, INSPECTION,
Door Lock Control System.>
Step Check Yes No
1 CHECK DIAGNOSTIC TROUBLE CODE
(DTC).
1) Prepare the Subaru Select Monitor kit.
2) Turn the ignition switch to ON (engine OFF)
and run the “PC application for Subaru Select
Monitor”.
3) On «System Selection Menu» display,
select {Integ. unit mode}.
4) Select the {Diagnostic Code(s) Display}.
5) Check that the DTC is displayed.
Is DTC B1500 “Keyless UART
com. Malfunction” displayed? Go to step 2 . Keyless entry con-
trol module is nor-
mal.
2 CHECK POWER SUPPLY.
1) Disconnect the keyless entry control mod-
ule harness connector.
2) Measure the voltage between harness con-
nector terminal and chassis ground.
Connector & terminal
(R80) No. 4 (+) — Chassis ground (–):
Is the voltage 10 V or more? Go to step 3 . Check the harness
for open circuits
and shorts
between the key-
less entry control
module and fuse.
3 CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
(R80) No. 7 — Chassis ground:
Is the resistance less than 10
:
? Go to step 4 . Repair or replace
the harness.
4 CHECK KEYLESS ENTRY CONTROL MOD-
ULE CIRCUIT.
1) Disconnect the harness connector of body
integrated unit.
2) Measure the resistance between harness
connector terminals.
Connector & terminal
(i84) No. 24 — (R80) No. 3:
Is the resistance less than 10
:
? Replace the key-
less entry control
module. <Ref. to
SL-48, Keyless
Entry Control Mod-
ule.>
Repair or replace
the harness.