Code No.B2352 Antenna fail

caution

Before replacing the ECU, ensure that the communication circuit is normal.

DIAGNOSIS FUNCTION

If an open circuit or short to earth occurs in the key slot, KOS-ECU sets the diagnosis code No. B2352.

JUDGMENT CRITERIA

When the engine switch power supply mode is set from OFF to ON or the driver’s door is opened with the engine switch power supply mode at OFF after the battery-discharged keyless operation key is inserted into the key slot, the KOS-ECU will send a signal to the key slot. Then the key slot will send a code to the keyless operation key via its antenna. If the KOS-ECU detects open circuit or short circuit to earth consecutively four times during the operation above, the ECU will set this diagnosis code.

PROBABLE CAUSES

Malfunction of the key slot
Damaged wiring harness and connectors
Malfunction of KOS-ECU

DIAGNOSIS PROCEDURE

STEP 1. Connector check: C-116 key slot connector

Q. Is the check result normal?

Go to Step 2

Repair the defective connector.

STEP 2. key slot check

Check that the key slot is normal (Refer to Inspection

Q. Is the check result normal?

Go to Step 3

Replace the key slot.

STEP 3. Connector check: C-10 KOS-ECU connector

Q. Is the check result normal?

Go to Step 4

Repair the defective connector.

STEP 4. Check the wiring harness between the C-116 key slot connector terminal No. 1, 2 and the C-10 KOS-ECU connector terminal No. 1, 9.

Check the signal wires for open circuit.

note

Before the wiring harness check, check the C-102 joint connector (3) <LH drive vehicles>, C-232 joint connector (5) <RH drive vehicles>, and repair if necessary.

Q. Is the check result normal?

Go to Step 5

Repair the wiring harness.

STEP 5. Check whether the diagnosis code is reset.

(1)Open the driver’s door.

(2)Turn the power supply mode of the engine switch from OFF to ON.

(3)Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Replace KOS-ECU and register the ID codes (Refer to

The diagnosis is complete.