DTC B2501 PRG Ecu Malfunction: Wiring diagram

Fig 1: PRG ECU Malfunction System Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

Fig 2: PRG ECU Malfunction Diagnostics Flowchart

Courtesy of SUBARU OF AMERICA, INC.

NOTE:

Target speed at PRG open operation (left) DUTY (right)

Fig 3: Target Speed Graph - PRG Open Operation (Left) DUTY (Right)
Courtesy of SUBARU OF AMERICA, INC.
Target speed at PRG close operation (left) DUTY (right)

Fig 4: Target Speed Graph - PRG Close Operation (Left) DUTY (Right)
Courtesy of SUBARU OF AMERICA, INC.
This malfunction code may be sensitively detected depending on the way users manually open or close the gate. If this malfunction code is stored in the memory as a past trouble but not as a present trouble, the system is normal. If this malfunction code is stored in the memory as a present trouble, perform the following procedures. [Procedure]

Clear the memory of PRG CM malfunction code using the Subaru Select Monitor. Ref. to POWER REAR GATE (DIAGNOSTICS)>Clear memory .

Perform auto-open/close of PRG by using either one of the following operation switches.

	Switch	OPERATION
Open	Power rear gate driver's switch	Long Push
	Rear gate/trunk SW	Long Push
	Power rear gate opener button	Short Push
Close	Power rear gate driver's switch	Long Push
	Rear gate/trunk SW	Long Push
	Power rear gate inner switch	Short Push

Using the Subaru Select Monitor, read DTC of PRG CM. Ref. to POWER REAR GATE (DIAGNOSTICS)>Diagnostic Trouble Code (DTC) .
If any present trouble is not stored in the memory after performing above procedures, the system is normal.