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: 

Stop light system Ref. to WIRING SYSTEM>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. Read the data of [Stop Light Switch] using Subaru Select Monitor. Ref. to TRANSMISSION (DIAGNOSTICS)>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)>TRANSMISSION CONTROL MODULE (TCM) .