B2415

DTC B2415: RA module power voltage

CAUTION:
- If DTC B2415 is set, diagnose the CAN bus lines.
- When replacing the ECU, always check that the communication circuit is normal.

Receiver Antenna Module And KOS-ECU Circuit:

DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply of the receiver antenna module, KOS-ECU sets DTC No. B2415.

TECHNICAL DESCRIPTION (COMMENT)
When the ignition switch is turned to ON, KOS-ECU transmits the signal to the receiver antenna module. The receiver antenna module transmits random numbers to the keyless operation key when it receives signals from KOS-ECU. If an open circuit or short to ground occurs on the wiring harness between KOS-ECU and receiver antenna module at this time, KOS-ECU determines that there is a problem.

TROUBLESHOOTING HINTS
- Malfunction of CAN bus line
- Damaged wiring harness and connectors
- Malfunction of the receiver antenna module
- Malfunction of KOS-ECU

DIAGNOSIS

Required Special Tools:
- MB991958: Scan Tool (M.U.T.-III Sub Assembly)
- MB991824: Vehicles Communication Interface (V.C.I.)
- MB991827: M.U.T.-III USB Cable
- MB991910: M.U.T.-III Main Harness A (Vehicles with CAN communication system)

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.







CAUTION: To prevent damage to scan tool (MB991958), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (MB991958).

1. Connect scan tool MB991958 to the data link connector.
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.

Q: Is the CAN bus line found to be normal?

YES : Go to Step 2.

NO : Repair the CAN bus line.

STEP 2. Check receiver antenna module connector C-10 and KOS-ECU connector C-31 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

Q: Is the receiver antenna module connector C-10 and KOS-ECU connector C-31 in good condition?

YES : Go to Step 3.

NO : Repair the defective connector.

STEP 3. Check the wiring harness between the receiver antenna module connector C-10 (terminal No. 8, 12) and the KOS-ECU connector C-31 (terminal No. 32, 7).

- Check the power supply and ground wires for open circuit or power supply wires for ground circuit.

Q: Is the wiring harness between receiver antenna module connector C-10 (terminal No. 8, 12) and the KOS-ECU connector C-31 (terminal No. 32, 7) in good condition?

YES : Go to Step 4.

NO : The wiring harness may be damaged or the connector(s) may have loose, corroded or damaged terminals, or terminals pushed back in the connector. Repair the wiring harness as necessary.

STEP 4. Replace the receiver antenna module, and check whether the diagnostic trouble code is reset.

1. Turn the ignition switch from the "LOCK" (OFF) position to the "ON" position.
2. Check if the DTC is set.

Q: Is the DTC set?

YES : Replace KOS-ECU and register the ID codes.

NO : The trouble can be an intermittent malfunction.