DTC P0724: Brake Switch "B" Circuit High: Notes

1. - 

DTC detecting condition: 

Immediately at fault recognition

Trouble symptom: 

Gear is not shifted down when climbing a hill or driving down a hill.

Wiring diagram: 

• Models without EyeSight

  Stop light system Ref. to WIRING SYSTEM (IMPREZA MODEL)>STOP LIGHT SYSTEM .

  Courtesy of SUBARU OF AMERICA, INC.

• Models with EyeSight

  Stop light system Ref. to WIRING SYSTEM (IMPREZA MODEL)>STOP LIGHT SYSTEM .

Courtesy of SUBARU OF AMERICA, INC.

1. CHECK STOP LIGHT SWITCH  .
   1. Turn the ignition switch to OFF.
   2. Disconnect the stop light switch connector.
   3. Measure the resistance between stop light switch.

      Connector & terminal 

      (B65) No. 1 - No. 2:

   Is the resistance 1 MΩ or more?

   Yes:  Go to  2.

   No:  Replace the stop light switch. Ref. to BRAKE>STOP LIGHT SWITCH .

2. CHECK HARNESS  .
   1. Disconnect the TCM connector.
   2. Turn the ignition switch to ON.
   3. Measure the voltage between TCM connector and chassis ground.

      Connector & terminal 

      (T10) No. 29 (+) - Chassis ground (-):

   Is the voltage 10 V or more?

   Yes:  Repair the short circuit of harness.

   No:  Go to  3.

3. CHECK INPUT SIGNAL FOR TCM  .
   1. Connect all connectors.
   2. Turn the ignition switch to ON.
   3. Using the Subaru Select Monitor, read data of [Stop Light Switch] in the [Data Monitor] of [Transmission]. Ref. to TRANSMISSION (DIAGNOSTICS) (IMPREZA MODEL)>DATA MONITOR .

   Is [OFF] displayed?

   Yes:  Current condition is normal. Check for poor contact in connectors or harnesses, and repair the defective part.

   No:  Go to  4.

4. CHECK FOR POOR CONTACT  .

   Is there poor contact in the stop light switch input signal circuit?

   Yes:  Repair the poor contact.

   No:  Replace the TCM. Ref. to CONTINUOUSLY VARIABLE TRANSMISSION (TR580 IMPREZA)>TRANSMISSION CONTROL MODULE (TCM) .