B1519
DTC B1519: Connector Lock System Detects Connector UnlockedDTC SET CONDITIONS
This DTC is set if a poor connection at the SRS-ECU is detected. However, if the vehicle condition returns to normal, DTC number B1519 will be automatically erased, and the SRS warning light will go out.
TROUBLESHOOTING HINTS
- Damaged connectors
- Malfunction of the SRS-ECU
DIAGNOSIS
Required Special Tool:
- MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: Vehicle Communication Interface (V.C.I.)
- MB991827: MUT-III USB Cable
- MB991910: MUT-III Main Harness A (Vehicles with CAN communication)
STEP 1. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the DTC set?
YES: Go to Step 2.
NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to How to Cope with Intermittent Malfunction).
STEP 2. Check the SRS-ECU connector C-114, C-115 and C-123.
Q: Are connectors correctly engaged?
YES: Go to Step 3.
NO: Engage the connectors correctly. Then go to Step 4.
STEP 3. Check SRS-ECU connector C-114, C-115 and C-123 for damage.
1. Disconnect SRS-ECU connectors C-114, C-115 and C-123.
2. Check the connector lock switch terminal inside the harness side connector for improper contact or deformation.
Q: Are the SRS-ECU connector C-114, C-115 and C-123 in good condition?
YES: Erase the diagnostic trouble code memory, and check the diagnostic trouble code. If DTC B1519 sets, replace the SRS-ECU. Then go to Step 4.
NO: Replace the SRS-ECU connector C-114, C-115 and C-123. Refer to Harness Connector Inspection. Then go to Step 4.
STEP 4. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC B1519 set?
YES: Return to Step 1.
NO: The procedure is complete.