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Diagnostic Procedure with Diagnostic Trouble Code (DTC)
IMMOBILIZER (DIAGNOSTICS)
E: DTC P1574 KEY COMMUNICATION FAILURE
DTC DETECTING CONDITION:
Failure of body integrated module to verify key (transponder) ID code
Step
1
CHECK BODY INTEGRATED MODULE
FUNCTION.
Insert the key to ignition switch (LOCK posi-
tion), and measure the changes in voltage
between antenna connectors.
Connector & terminal
(B351) No. 1 (+) — Chassis ground (
2
CHECK IGNITION KEY (TRANSPONDER).
1) Remove the key from ignition switch.
2) Start the engine using other key which is
already registered.
Check
Is the voltage −30 to 30 V?
(Approx. 0.1 second after
inserting the key) Is the voltage
0 V? (Approx. 1 second after
inserting the key)
−
):
Does the engine start?
IM(diag)-24
Yes
Go to step 2.
Replace the body
integrated module
<Ref. to SL-44,
Body Integrated
Module.> and
replace all the igni-
tion keys (includ-
ing transponder).
Execute the regis-
tration procedure
next. Refer to
"IMMOBILIZER
TEACHING
OPERATION
MANUAL".
Replace all the
Replace the body
ignition keys
integrated module
(including tran-
<Ref. to SL-44,
sponder). Execute
Body Integrated
the registration
Module.> and
procedure next.
replace all the igni-
Refer to "IMMOBI-
tion keys (includ-
LIZER TEACH-
ing transponder).
ING OPERATION
Execute the regis-
MANUAL".
tration procedure
next. Refer to
"IMMOBILIZER
TEACHING
OPERATION
MANUAL".
No
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