B2414
DTC B2414: Unlock sensor failCAUTION:
- If DTC No. B2414 is set, diagnose the CAN buslines.
- When replacing the ECU, always check that the communication circuit is normal.
Unlock Sensor Circuit (part 1):
Unlock Sensor Circuit (part 2):
DTC SET CONDITION
If KOS-ECU detects an abnormality in power supply of the unlock sensor, KOS-ECU sets DTC No.B2414.
TECHNICAL DESCRIPTION (COMMENT)
If an abnormality in power supply of the unlock sensor is detected when power supply of it is turned on,KOS-ECU determines that there is a problem..
TROUBLESHOOTING HINTS
- Damaged wiring harness and connectors
- Malfunctions of the unlock sensor
- Malfunction of the KOS-ECU
DIAGNOSIS
Required Special Tools:
- MB992006: Extra fine probe
- MB991223: Harness set
- 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, read CAN bus the diagnostic trouble code.
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. Refer to "How to connects can tool (M.U.T.-III)." How To Connect The Scan Tool (M.U.T.-III)
2. Turn the ignition switch to the "ON" position.
3. Check whether the CAN bus lines related DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES: Repair the CAN bus line (Refer to CAN Bus Diagnostics table).
NO: Go to Step 2.
STEP 2. Check KOS-ECU connector C-05, unlock sensor(front door: LH) connector E-18 and unlock sensor (front door: RH) connector E-05 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are KOS-ECU connector C-05, unlock sensor (frontdoor: LH) connector E-18 and unlock sensor (frontdoor: RH) connector E-05 in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged component(s). Refer to general (Electrical), Harness Connector Inspection. Check that the unlock sensor works normally.
STEP 3. Check the wiring harness between the KOS-ECU connector C-05 (terminal Nos. 24, 36) and unlock sensor (front door: LH) connector E-18 (terminal Nos. 4, 2) for open circuit.
1. Disconnect KOS-ECU connector C-05 and unlock sensor (front door: LH) connector E-18, and check the wiring harness.
2. Check the wiring harness between KOS-ECU connector C-05 (terminal No.24) and unlock sensor (front door: LH)connector E-18 (terminal No.4).
OK: Continuity exists (2 Ohms or less)
3. Check the wiring harness between KOS-ECU connector C-05 (terminal No.36) and unlock sensor (front door: LH) connector E-18 (terminal No.2).
OK: Continuity exists (2 Ohms or less)
Q: Is the wiring harness between KOS-ECU connector C-05 (terminal Nos. 24, 36) and unlock sensor (front door:LH) connector E-18 (terminal Nos. 4, 2) in good condition?
YES: Go to Step 4.
NO (KOS-ECU connector C-05 terminal No.24 - unlock sensor (front door: LH) connector E-18 terminal No.4.): Repair the wiring harness between KOS-ECU connector C-05 (terminal No.24) and unlock sensor (front door: LH) connector E-18 (terminal No.4).
NO (KOS-ECU connector C-05 terminal No.36 - unlock sensor (front door: LH) connector E-18 terminal No.2.): Repair the wiring harness between KOS-ECU connector C-05 (terminal No.36) and unlock sensor(front door: LH) connector E-18 (terminal No.2).
STEP 4. Check the wiring harness between the unlock sensor (front door: LH) connector E-18 (terminal Nos. 4, 2)and the ground for short circuit.
1. Disconnect unlock sensor (front door: LH) connector E-18,and check the wiring harness.
2. Check the wiring harness between unlock sensor (frontdoor: LH) connector E-18 (terminal No. 4) and ground
OK: No continuity
3. Check the wiring harness between unlock sensor (frontdoor: LH) connector E-18 (terminal No. 2) and ground
OK: No continuity
Q: Is the wiring harness between unlock sensor (frontdoor: LH) connector E-18 (terminal Nos. 4, 2) and the ground in good condition?
YES: Go to Step 5.
NO [unlock sensor (front door: LH) connector E-18terminal No.4 - ground.]: Repair the wiring harness between unlock sensor (front door: LH) connector E-18 (terminal No.4) and ground.
NO [unlock sensor (front door: LH) connector E-18terminal No.2 - ground.]: Repair the wiring harness between unlock sensor (front door: LH) connector E-18 (terminal No.2) and the ground.
STEP 5. Check the wiring harness between the KOS-ECU connector C-05 (terminal Nos. 25, 36) and unlock sensor (front door: RH) connector E-05 (terminal Nos. 4, 2) for open circuit.
1. Disconnect KOS-ECU connector C-05 and unlock sensor (front door: RH) connector E-05, and check the wiring harness.
2. Check the wiring harness between KOS-ECU connector C-05 (terminal No.25) and unlock sensor (front door: RH) connector E-05 (terminal No.4).
OK: Continuity exists (2 Ohms or less)
3. Check the wiring harness between KOS-ECU connector C-05 (terminal No.36) and unlock sensor (front door: RH) connector E-05 (terminal No.2).
OK: Continuity exists (2 Ohms or less)
Q: Is the wiring harness between KOS-ECU connector C-05 (terminal Nos. 25, 36) and unlock sensor (front door:RH) connector E-05 (terminal Nos. 4, 2) in good condition?
YES: Go to Step 6.
NO (KOS-ECU connector C-05 terminal No.25 - unlock sensor (front door: RH) connector E-05 terminal No.4.): Repair the wiring harness between KOS-ECU connector C-05 (terminal No.25) and unlock sensor(front door: RH) connector E-05 (terminal No.4).
NO (KOS-ECU connector C-05 terminal No.36 - unlock sensor (front door: RH) connector E-05 terminal No.2.): Repair the wiring harness between KOS-ECU connector C-05 (terminal No.36) and unlock sensor(front door: RH) connector E-05 (terminal No.2).
STEP 6. Check the wiring harness between the unlock sensor (front door: RAH) connector E-05 (terminal Nos. 4, 2) and the ground for short circuit.
1. Disconnect unlock sensor (front door: RH) connector E-05,and check the wiring harness.
2. Check the wiring harness between unlock sensor ((frontdoor: RH) connector E-05 (terminal No. 4) and ground
OK: No continuity
3. Check the wiring harness between unlock sensor (frontdoor: RH) connector E-05 (terminal No. 2) and ground
OK: No continuity
Q: Is the wiring harness between unlock sensor (frontdoor: RH) connector E-05 (terminal Nos. 4, 2) and the ground in good condition?
YES: Go to Step 7.
NO [unlock sensor (front door: RH) connector E-05terminal No.4 - ground.]: Repair the wiring harness between unlock sensor (front door: RH) connector E-05 (terminal No.4) and ground.
NO [unlock sensor (front door: RH) connector E-05 terminal No.2 - ground.]: Repair the wiring harness between unlock sensor ((front door: RH) connector E-05 (terminal No.2) and the ground.
STEP 7. Replace the unlock sensor, and check whether the diagnostic trouble code is reset.
1. Erase the DTC.
2. Turn the ignition switch from the LOCK (OFF) position to the On position.
3. Check if the DTC is set.
Q: Is the DTC set?
YES: Replace KOS-ECU and register the ID codes. (Refer to ID Code Registration Necessity Judgment Table)
NO: The procedure is complete.