DTC B2721

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DTC B2721

B3E090201072W44

DTC B2721 | Liftgate/decklid ajar output short to ground
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DETECTION CONDITION | Short to GND in wiring harness between PJB and trunk lid latch switch/liftgate latch switch

POSSIBLE CAUSE

• Short to GND in wiring harness between PJB terminal J-06 Z and trunk lid latch switch terminal B (4SD)
• Short to GND in wiring harness between PJB terminal J-06 X and liftgate latch switch terminal B (5HB)
• Trunk lid latch switch malfunction (4SD)
• Liftgate latch switch malfunction (5HB)
• PJB malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1

INSPECT TRUNK LID LATCH SWITCH/LIFTGATE LATCH SWITCH CONNECTOR
• Disconnect the trunk lid latch switch/liftgate latch switch connector.
• Inspect the trunk lid latch switch/liftgate latch 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 LATCH SWITCH/LIFTGATE LATCH SWITCH SIGNAL CIRCUIT FOR SHORT TO GND
• Inspect for continuity between following terminals:

  - PJB terminal J-06 Z (wiring harness-side) and body GND.
  - PJB terminal J-06 X (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 LATCH SWITCH/LIFTGATE LATCH SWITCH • Inspect the trunk lid latch switch/liftgate latch switch. (See TRUNK LID LATCH SWITCH INSPECTION.) (See LIFTGATE LATCH SWITCH INSPECTION.) • Is there any malfunction? | Yes | Replace the trunk lid latch switch/liftgate latch switch, then go to the next step. (See TRUNK LID LATCH AND OPENER REMOVAL/INSTALLATION.) (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.)
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.
(See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION.)

No | DTC troubleshooting completed.