54A-B1A35 Transponder read error

DTC B1A35 Transponder read error

caution

When DTC B1A35 is set, be sure to diagnose the CAN bus line.
When replacing the ECU, always check that the communication circuit is normal.

DIAGNOSTIC FUNCTION

ETACS-ECU sets DTC B1A35 when it cannot receive data from the transponder.

JUDGMENT CRITERIA

ETACS-ECU determines that the abnormality is present, if it cannot receive the key ID for the ignition key when the ignition switch is turned ON.

TROUBLESHOOTING HINTS

The CAN bus line may be defective
The another transponder may be defective
The receiver antenna may be defective
The ETACS-ECU may be defective
Interference of another transponder

DIAGNOSIS

STEP 1. Using scan tool (M.U.T.-IIISE), diagnose the CAN bus line.

(1)

caution

To prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).

Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)

(2) Turn the ignition switch to the "ON" position.

(3) Diagnose the CAN bus line.

(4) Turn the ignition switch to the "LOCK" (OFF) position.

Is the CAN bus line found to be normal?

Go to Step 2

Repair the CAN bus line (Refer to GROUP 54C - Troubleshooting

STEP 2. Check the ignition key inserted in the key cylinder for interference.

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

Move away or remove other ignition keys or anything that interferes with the communication, and go to Step 3

Go to Step 3

STEP 3. Using scan tool (M.U.T.-IIISE), read the DTC again.

Check again if the DTC is set.

(1) Register the ignition key which is used when detect the DTC.

(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 DTC is set.

Is the DTC set?

Go to Step 4

The diagnosis is complete.

STEP 4. Replace the ignition key with another registered key for the vehicle, and using scan tool (M.U.T.-IIISE), read the DTC again.

Replace the ignition key by which the DTC is set with another ignition key nearby, and check again if the DTC is set.

(1) Remove the ignition key from key cylinder and insert it again then turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.

(2) Check if the DTC is set.

Is the DTC set?

Go to Step 5

Go to Step 6

STEP 5. Register the key ID and using scan tool (M.U.T.-IIISE), read the DTC again.

), and check again if the DTC is set.

(1) Remove the ignition key from key cylinder and insert it again then turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.

(2) Check if the DTC is set.

Is the DTC set?

Go to Step 6

The diagnosis is complete.

STEP 6. Replace the ignition key with a new one, and using scan tool (M.U.T.-IIISE), read the DTC again.

Replace the ignition key by which the DTC is set with a new one, register the key ID of the new key, (refer to

), and check again if the DTC is set.

(1) Remove the ignition key from key cylinder and insert it again then turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.

(2) Check if the DTC is set.

Is the DTC set?

Go to Step 7

The diagnosis is complete.

STEP 7. Replace the receiver antenna, and using scan tool (M.U.T.-IIISE), read the DTC again.

Replace the receiver antenna, register the key ID of the key (refer to

), and check again if the DTC is set.

(1) Remove the ignition key from key cylinder and insert it again then turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.

(2) Check if the DTC is set.

Is the DTC set?

Replace ETACS-ECU (Refer to

) and register the ID codes (Refer to

The diagnosis is complete.