Keyless Operation System (KOS)
DTC B2415: RA Module Power VoltageCAUTION:
- 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 (Part 1):
Receiver Antenna Module And KOS-ECU Circuit (Part 2):
DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply of the receiver antenna module or receiver antenna assembly, 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 and receiver antenna assembly. The receiver antenna module and receiver antenna assembly 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 or receiver antenna assembly 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 assembly
- 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
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-08, receiver antenna assembly connector D-14, KOS-ECU connector C-05, joint connector (6) C-16 and intermittent connector C-41 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is the receiver antenna module connector C-08, receiver antenna assembly connector D-14, KOS-ECU connector C-05, joint connector (6) C-16 and intermittent connector C-41 in good condition?
YES : Go to Step 3.
NO : Repair the defective connector.
STEP 3. Check the wiring harness between the receiver antenna assembly connector D-14 (terminal Nos.1, 8, 12, 3, 5) and the KOS-ECU connector C-05 (terminal Nos.12, 32, 7, 9, 13) for open circuit.
1. Disconnect receiver antenna assembly connector D-14 and KOS-ECU connector C-05, and check the wiring harness.
2. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.1) and KOS-ECU connector C-05 (terminal No.12)
OK: Continuity exists (2 ohms or less)
3. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.8) and KOS-ECU connector C-05 (terminal No.32)
OK: Continuity exists (2 ohms or less)
4. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.12) and KOS-ECU connector C-05 (terminal No.7)
OK: Continuity exists (2 ohms or less)
5. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.3) and KOS-ECU connector C-05 (terminal No.9)
OK: Continuity exists (2 ohms or less)
6. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.5) and KOS-ECU connector C-05 (terminal No.13)
OK: Continuity exists (2 ohms or less)
Q: Is the wiring harness between receiver antenna assembly connector D-14 (terminal Nos.1, 8, 12, 3, 5) and the KOS-ECU connector C-05 (terminal Nos.12, 32, 7, 9, 13) in good condition?
YES : Go to Step 4.
NO (receiver antenna assembly connector D-14 terminal No.1 - KOS-ECU connector C-05 terminal No.12.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.1) and the KOS-ECU connector C-05 (terminal No.12).
NO (receiver antenna assembly connector D-14 terminal No.8 - KOS-ECU connector C-05 terminal No.32.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.8) and the KOS-ECU connector C-05 (terminal No.32).
NO (receiver antenna assembly connector D-14 terminal No.12 - KOS-ECU connector C-05 terminal No.7.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.12) and the KOS-ECU connector C-05 (terminal No.7).
NO (receiver antenna assembly connector D-14 terminal No.3 - KOS-ECU connector C-05 terminal No.9.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.3) and the KOS-ECU connector C-05 (terminal No.9).
NO (receiver antenna assembly connector D-14 terminal No.5 - KOS-ECU connector C-05 terminal No.13.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.5) and the KOS-ECU connector C-05 (terminal No.13).
STEP 4. Check the wiring harness between the receiver antenna assembly connector D-14 (terminal Nos.1, 8, 12, 3, 5) and the ground for short circuit.
1. Disconnect receiver antenna assembly connector D-14, and check the wiring harness.
2. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.1) and ground
OK: No continuity
3. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.8) and and ground
OK: No continuity
4. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.12) and and ground
OK: No continuity
5. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.3) and ground
OK: No continuity
6. Check the wiring harness between receiver antenna assembly connector D-14 (terminal No.5) and ground
OK: No continuity
Q: Is the wiring harness between receiver antenna assembly connector D-14 (terminal Nos.1, 8, 12, 3, 5) and the ground in good condition?
YES : Go to Step 5.
NO (receiver antenna assembly connector D-14 terminal No.1 - ground.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.1) and the KOS-ECU connector C-05 (terminal No.12).
NO (receiver antenna assembly connector D-14 terminal No.8 - ground.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.8) and the ground.
NO (receiver antenna assembly connector D-14 terminal No.12 - ground.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.12) and the ground.
NO (receiver antenna assembly connector D-14 terminal No.3 - ground.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.3) and the ground.
NO (receiver antenna assembly connector D-14 terminal No.5 - ground.) : Repair the wiring harness between receiver antenna assembly connector D-14 (terminal No.5) and the ground.
STEP 5. Replace the receiver antenna assembly, 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 : Go to Step 6.
NO : The procedure is complete.
STEP 6. Check the wiring harness between the receiver antenna module connector C-08 (terminal Nos. 2, 1, 8, 12) and the KOS-ECU connector C-05 (terminal Nos. 11, 12, 32, 7) for open circuit.
1. Disconnect receiver antenna module connector C-08 and KOS-ECU connector C-05, and check the wiring harness.
2. Check the wiring harness between receiver antenna module connector C-08 (terminal No.2) and KOS-ECU connector C-05 (terminal No.11)
OK: Continuity exists (2 ohms or less)
3. Check the wiring harness between receiver antenna module connector C-08 (terminal No.1) and KOS-ECU connector C-05 (terminal No.12)
OK: Continuity exists (2 ohms or less)
4. Check the wiring harness between receiver antenna module connector C-08 (terminal No.8) and KOS-ECU connector C-05 (terminal No.32)
OK: Continuity exists (2 ohms or less)
5. Check the wiring harness between receiver antenna module connector C-08 (terminal No.12) and KOS-ECU connector C-05 (terminal No.7)
OK: Continuity exists (2 ohms or less)
Q: Is the wiring harness between receiver antenna module connector C-08 (terminal Nos. 2, 1, 8, 12) and the KOS-ECU connector C-05 (terminal Nos. 11, 12, 32, 7) in good condition?
YES : Go to Step 7.
NO (receiver antenna module connector C-08 terminal No.2 - KOS-ECU connector C-05 terminal No.11.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.2) and the KOS-ECU connector C-05 (terminal No.11).
NO (receiver antenna module connector C-08 terminal No.1 - KOS-ECU connector C-05 terminal No.12.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.1) and the KOS-ECU connector C-05 (terminal No.12).
NO (receiver antenna module connector C-08 terminal No.8 - KOS-ECU connector C-05 terminal No.32.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.8) and the KOS-ECU connector C-05 (terminal No.32).
NO (receiver antenna module connector C-08 terminal No.12 - KOS-ECU connector C-05 terminal No.7.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.12) and the KOS-ECU connector C-05 (terminal No.7).
STEP 7. Check the wiring harness between the receiver antenna module connector C-08 (terminal Nos. 2, 1, 8, 12) and the ground for short circuit.
1. Disconnect receiver antenna module connector C-08, and check the wiring harness.
2. Check the wiring harness between receiver antenna module connector C-08 (terminal No.2) and ground
OK: No continuity
3. Check the wiring harness between receiver antenna module connector C-08 (terminal No.1) and ground
OK: No continuity
4. Check the wiring harness between receiver antenna module connector C-08 (terminal No.8) and ground
OK: No continuity
5. Check the wiring harness between receiver antenna module connector C-08 (terminal No.12) and ground
OK: No continuity
Q: Is the wiring harness between receiver antenna module connector C-08 (terminal Nos. 2, 1, 8, 12) and the ground in good condition?
YES : Go to Step 8.
NO (receiver antenna module connector C-08 terminal No.2 - ground.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.2) and the ground.
NO (receiver antenna module connector C-08 terminal No.1 - ground.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.1) and the ground.
NO (receiver antenna module connector C-08 terminal No.8 - ground.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.8) and the ground.
NO (receiver antenna module connector C-08 terminal No.12 - ground.) : Repair the wiring harness between receiver antenna module connector C-08 (terminal No.12) and the ground.
STEP 8. 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 procedure is complete.