DTC B2821 [POWER LIFTGATE (PLG) SYSTEM]

id0902e9380800

DTC B2821

Closure motor circuit malfunction

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

DTC B2821	Closure motor circuit malfunction
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
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.
1		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.
2		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.
3		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.
4		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.)
5		No	DTC troubleshooting completed.