Subaru IMPREZA GD 2007 Series Manual page 3959

asieps_tobira_IM_US.book 18 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
IMMOBILIZER (DIAGNOSTICS)
C: DTC P1574 KEY COMMUNICATION FAILURE
DTC DETECTING CONDITION:
• Failure of IMMCM to verify key (transponder) ID code
• Key (transponder) malfunctioning
Step
1 CHECK IMMCM FUNCTION.
Insert the key into the ignition switch (LOCK
position), then measure changes in voltage
between the antenna connectors.
Connector & terminal
(B142) No. 1 (+) — No. 2 (–):
2 CHECK IGNITION KEY (TRANSPONDER).
1) Remove the key from ignition switch.
2) Start the engine using other key which is
already registered.
Check
After inserting the key, is the
voltage 0 — 30 V (Approx. 0.1
second) or 0 V (Approx. 1 sec-
ond)?
Does the engine start?
IM(diag)-18
Yes No
Go to step 2. Replace the
IMMCM <Ref. to
SL-47, Immobi-
lizer Control Mod-
ule.> and then
replace all ignition
keys (including the
transponder). Exe-
cute the registra-
tion procedure
next. Refer to the
"REGISTRATION
MANUAL FOR
IMMOBILIZER".
Replace the igni- Replace the
tion key (including IMMCM <Ref. to
the transponder). SL-47, Immobi-
Execute the regis- lizer Control Mod-
tration procedure ule.> and then
next. Refer to the replace all ignition
"REGISTRATION keys (including the
MANUAL FOR transponder). Exe-
IMMOBILIZER". cute the registra-
tion procedure
next. Refer to the
"REGISTRATION
MANUAL FOR
IMMOBILIZER".