DTC B2559


B3E090200200W09

DTC B2559

Trunk lid lock/unlock switch circuit failure

DETECTION CONDITION

Short to GND in wiring harness between PJB and trunk lid key cylinder switch

POSSIBLE CAUSE

• Short to GND in wiring harness between PJB terminal J-06 P and trunk lid key cylinder switch terminal C
• Trunk lid key cylinder switch malfunction
• PJB malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT TRUNK LID KEY CYLINDER SWITCH CONNECTOR
• Disconnect the trunk lid key cylinder switch connector.
• Inspect the trunk lid key cylinder switch connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT PJB CONNECTOR
• Disconnect the PJB connector.
• Inspect the PJB connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
• Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT TRUNK LID KEY CYLINDER SWITCH SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between PJB terminal J-06 P (wiring harness-side) and body GND.
• Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 5.
No
Go to the next step.
4
INSPECT TRUNK LID KEY CYLINDER SWITCH
• Inspect the trunk lid key cylinder switch.
• Is there any malfunction?
Yes
Replace the trunk lid key cylinder switch, then go to the next step.
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear the DTC from the PJB memory using the WDS or equivalent.
• Perform the self-test.
(See PJB SELF-TEST.)
• Is the same DTC present?
Yes
Replace the PJB.
No
DTC troubleshooting completed.