Subaru Crosstrek Service Manual: Dtc p0724 brake switch "b" circuit high
CONTINUOUSLY VARIABLE TRANSMISSION (DIAGNOSTICS) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)
DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH
DTC detecting condition:
Immediately at fault recognition
Trouble symptom:
Gear is not shifted down when climbing a hill or driving down a hill.
CAUTION:
Use the check board when measuring the TCM terminal voltage and resistance.
Wiring diagram:
• Without EyeSight
Stop light system Stop Light System > WIRING DIAGRAM">
• With EyeSight
Stop light system Stop Light System > WIRING DIAGRAM">
| STEP | CHECK | YES | NO |
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.
Terminals
No. 3 — No. 4:
Is the resistance 1 M? or more?
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH">Go to Step 2.
Replace the stop light switch. 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
(B54) No. 29 (+) — Chassis ground (−):
Is the voltage 10 V or more?
Repair the short circuit of harness.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH">Go to Step 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.
Is “OFF” displayed?
Current condition is normal. Check for poor contact in connectors or harnesses, and repair the defective part.
Diagnostic Procedure with Diagnostic Trouble Code (DTC) > DTC P0724 BRAKE SWITCH "B" CIRCUIT HIGH">Go to Step 4.
4.CHECK FOR POOR CONTACT.
Is there poor contact in the stop light switch input signal circuit?
Repair the poor contact.
Replace the TCM. Transmission Control Module (TCM)">
1. OUTLINE OF DIAGNOSIS
• Detect the brake signal stuck to ON.
• Judge as NG if a predetermined number of acceleration occurs while the cruise control is set to OFF and the brake is ON.
2. EXECUTION CONDITION
Secondary parameters | Execution condition |
Cruise control | OFF |
3. DIAGNOSTIC METHOD
If the duration of time while the following conditions are met is longer than the time indicated, judge as NG.
Malfunction Criteria | Threshold Value |
Number of times that vehicle speed changes from 1 km/h to 30 km/h while the brake SW is ON | > 10 count |
Malfunction Indicator Light Illumination: Does not illuminate.
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Other materials:
Caution
FRONT SUSPENSION > General DescriptionCAUTION• Wear appropriate work clothing, including a helmet, protective goggles and protective shoes when performing any work.• Before removal, installation or disassembly, be sure to clarify the failure. Avoid unnecessary removal, installation, d ...
Service mode (models without "keyless access with push-button start system")
In service mode, the remote engine start
function is temporarily disabled to prevent
the system from unexpectedly starting the
engine while being serviced.
To engage or disengage service mode:
1. Enter the vehicle and close all vehicle
doors and the rear gate.
2. Verify that the select le ...
Location
SECURITY AND LOCKS > Relay and FuseLOCATIONMain fuse boxFuse 15 A (key warning switch, turn signal & hazard unit, body integrated unit)(A)Fuse 20 A (body integrated unit, immobilizer antenna)(B)Relay & fuse boxFuse 15 A (body integrated unit)(C)Fuse 10 A (keyless access CM, TPMS & key ...
