When replacing the ECU, always
check that the communication circuit is normal.
DIAGNOSIS FUNCTION
ETACS-ECU sets the diagnosis code No. B2352 when open or short circuit to the earth in
the antenna at the key reminder switch is detected.
JUDGMENT CRITERIA
When during the transponder communication, the antenna at the key reminder switch (immobilizer antenna)
malfunction is found, ETACS-ECU determines that the abnormality is present.
PROBABLE CAUSES
Malfunction of key reminder switch (open circuit of immobilizer
antenna)
Damaged wiring harness and connectors
Malfunction of receiver antenna
Malfunction of ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III data list
Check the ETACS-ECU service data.
Turn the ignition switch to the OFF (key inserted) position.
Item No.
Item name
Normal condition
Item 264
Handle lock switch
Key in
OK: Normal condition is displayed.
Q.
Is the check result normal?
Go to Step 2.
Refer to GROUP 54A - Inspection Procedure 3: "Key reminder switch signal
is not received ."
STEP 2. Resistance measurement at the receiver antenna connector (ANTP,
ANTG line).
(1)Disconnect the connector and measure the resistance at the wiring harness side.
(2)Insert the ignition key into ignition switch.
(3)Measure the resistance between the receiver antenna connector (ANTP, ANTG line)
and the body earth. OK: Continuity exists (12 Ω or less)
Q.
Is the check result normal?
Go to Step 4
Go to Step 3
STEP 3. Check of short to power supply, short to earth, and open circuit
in ANTP, ANTG line between receiver antenna connector and key reminder switch connector .
Q.
Is the check result normal?
Go to Step 4
Repair the connector(s) or wiring harness.
STEP 4. Check whether the diagnosis code is reset.
(1)Erase the diagnosis code.
(2)Register the ignition key which is used when detect the diagnosis code.
(3)Remove the ignition key from the cylinder and then insert the ignition key again.
(4)After 2 or 3 seconds later from inserting the key, then turn the ignition ON.
(5)Check if the diagnosis code is set?
Q.
Is the diagnosis code set?
Replace receiver antenna and turn the ignition switch to the ON and OFF. Then
go to Step 5.
The diagnosis is complete.
STEP 5. Check whether the diagnosis code is reset.
Recheck if the diagnosis code is set.
(1)Register the ignition key which is used when detect the diagnosis code.
(2)Remove the ignition key from the cylinder and then insert the ignition key again.
(3)After 2 or 3 seconds later from inserting the key, then turn the ignition ON.
(4)Check if the diagnosis code is set?
Q.
Is the diagnosis code set?
Replace ETACS-ECU and register the ID codes (Refer to ).
Refer to GROUP 54A - Inspection Procedure 3: "Key reminder switch signal
is not received 
."