DTC B2821 [POWER LIFTGATE (PLG) SYSTEM]

id0902e9380800

DTC B2821 | Closure motor circuit malfunction
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DETECTION CONDITION | Liftgate latch switch signal does not change (ON) when closure motor is operating
POSSIBLE CAUSE | • Closure motor malfunction • Open circuit in wiring harness between PLG control module terminal 1A and closure motor terminal A (liftgate latch and lock actuator) • Open circuit in wiring harness between PLG control module terminal 1B and closure motor terminal B (liftgate latch and lock actuator) • Liftgate latch switch malfunction • A short circuit to ground in the wiring harness between the liftgate latch switch and PLG control module • PLG control module malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | INSPECT LIFTGATE LOCK ACTUATOR • Inspect the liftgate lock actuator. (See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.) • Is the liftgate lock actuator normal? | Yes | Go to the next step.
No | Replace the liftgate latch and lock actuator. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) Go to Step 5.
2 | INSPECT WIRING HARNESS BETWEEN PLG CONTROL MODULE AND LIFTGATE LOCK ACTUATOR • Disconnect the PLG control module connector. • Disconnect the liftgate latch switch connector. • Inspect the wiring harness between PLG control module terminals 1A and 1B, and liftgate lock actuator terminals A and B for an open circuit. • Is the wiring harness normal? | Yes | Go to the next step.
No | Repair or replace the wiring harness. Go to Step 5.
3 | INSPECT LIFTGATE LATCH SWITCH • Inspect the liftgate latch switch. (See LIFTGATE LATCH AND LOCK ACTUATOR INSPECTION.) • Is the liftgate latch switch normal? | Yes | Go to the next step.
No | Replace the liftgate latch and lock actuator. (See LIFTGATE LATCH AND LOCK ACTUATOR REMOVAL/INSTALLATION.) Go to Step 5.
4 | INSPECT WIRING HARNESS BETWEEN PLG CONTROL MODULE AND LIFTGATE LATCH SWITCH • Inspect the wiring harness between PLG control module terminal 3F and liftgate latch switch terminal B for a short circuit to ground system. • Is the wiring harness normal? | Yes | Go to the next step.
No | Repair or replace the wiring harness. Go to the next step.
5 | VERIFY CORRECTION COMPLETED • Reconnect the disconnected connector. • Clear the DTC. • Operate the PLG system. (Close operation) • Is DTC B2821 stored? | Yes | Replace the PLG control module. (See POWER LIFTGATE (PLG) CONTROL MODULE REMOVAL/INSTALLATION.)
No | DTC troubleshooting completed.