Code No.B1702: Reception error of key ID

caution

Whenever the ECU is replaced, ensure that the input and output signal circuits are normal.

OPERATION

The key reminder switch (key ring antenna) supplies the electric motor key with power, and the electric motor key sends the key ID to the ETACS-ECU. ETACS-ECU receives the key ID with the key ring antenna, and judges if the electric motor key is the registered one.

TROUBLE JUDGMENT

Diagnosis code No.B1702 is set when there are other electric motor keys or anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the electric motor key that is going to start the electric motor unit.
If the key ID is not sent to the ETACS-ECU even when the electric motor switch is turned to the ON position, diagnosis code No.B1702 is stored.

note

Diagnosis code No.B1702 is always set along with EV-ECU diagnosis code No.P0513.

PROBABLE CAUSES

Interference of the key ID reading
Malfunction of the key ring antenna (antenna wire)^*

note ^*: The code No. B1722 will be set if a trouble occurs in the key ring antenna.
Malfunction of electric motor key
Malfunction of ETACS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Check the diagnosis code No.B1722 is set.

Q. Is the diagnosis code No.B1722 set?

Refer to

Go to Step 2

STEP 2. Check the electric motor key inserted in the key cylinder for interference.

Q. Are there other electric motor keys or anything that interferes with the communication (things that generate radio waves such as magnets and an air-cleaning device that has a power plug) near the electric motor key inserted in the key cylinder?

Move away or remove other electric motor keys or things that interfere with the communication (things that generate radio waves such as magnets and a air-cleaning device that has a power plug) near the electric motor key. Then, go to step 4.

Go to Step 3

STEP 3. Check with the spare electric motor key that has already been registered.

Check that the electric motor unit starts using the spare electric motor key that has already been registered.

Q. Is diagnosis code No.B1702 set?

Replace the ETACS-ECU and register the ID codes again (Refer to

). After registering the ID codes, go to Step 4.

Replace the electric motor key for which diagnosis code No.B1702 is set, and register the ID codes again (Refer to

). After registering the ID codes, go to Step 4.

STEP 4. Check whether the diagnosis code is reset.

(1)Turn the electric motor switch to the "LOCK" (OFF) position once, and then turn it to the ON position again.

(2)On completion, check that diagnosis code No.B1702 is not reset.

Q. Is diagnosis code No.B1702 set?

Return to Step 1.

The diagnosis is complete. If another diagnosis code is set, refer to Diagnosis Code Chart

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