Subaru 2009 IMPREZA Service Manual page 3122

SECURITY AND LOCKS
3. CHECK KEYLESS ENTRY CONTROL MODULE
Step
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.
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 (–):
3 CHECK GROUND CIRCUIT.
Measure the resistance between harness con-
nector terminal and chassis ground.
Connector & terminal
(R80) No. 7 — Chassis ground:
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:
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.>
Keyless Entry System
Check
Is DTC B1500 "Keyless UART
com. Malfunction" displayed?
Is the voltage 10 V or more?
Is the resistance less than 10 ? Go to step 4.
Is the resistance less than 10 ? Replace the key-
SL-18
Yes No
Go to step 2. Keyless entry con-
trol module is nor-
mal.
Go to step 3. Check the harness
for open circuits
and shorts
between the key-
less entry control
module and fuse.
Repair or replace
the harness.
Repair or replace
less entry control the harness.
module. <Ref. to
SL-48, Keyless
Entry Control Mod-
ule.>