DTC P0703-12: Brake Switch "B" Circuit Short to Battery [10/2022 - ]: Procedure

1. According to the display on the GTS, read the Data List while the vehicle is being driven.

   Powertrain > Transmission > Data List 

   Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
   Stop Light SW	Stop light switch status	ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-

   Powertrain > Transmission > Data List 

   Tester Display
   Stop Light SW

   Result

   Result	Proceed to
   The value of Stop Light SW is OFF	A
   The value of Stop Light SW is not OFF	B

Result: 

A 

SYMPTOM SIMULATION AND DTC CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ] 

Result: 

B 

See step  2

1. Check the stop light switch assembly installation condition.

   HINT: 

   Refer to INSTALLATION [10/2022 - ]

   OK

   Stop light switch assembly is installed correctly.

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REINSTALL STOP LIGHT SWITCH ASSEMBLY CORRECTLY. Refer to  INSTALLATION [10/2022 - ] 

Result: 

OK 

See step  3

Refer to ON-VEHICLE INSPECTION [10/2022 - ]

Result

Result: 

NG 

REPLACE STOP LIGHT SWITCH ASSEMBLY. Refer to  REMOVAL [10/2022 - ] 

Result: 

OK 

See step  4

Pre-procedure1

• Disconnect the A16 ECM connector.

• Measure the voltage according to the value(s) in the table below.

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  A16-14 (STP) - Body ground	Brake pedal released	Below 1.5 V	V
  A16-14 (STP) - Body ground	Brake pedal depressed	7.5 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (STOP LIGHT SWITCH ASSEMBLY - ECM) 

Result: 

OK 

See step  5

HINT: 

Refer to REMOVAL [10/2022 - ]

Result

Result: 

NEXT 

PERFORM REGISTRATION. Refer to  REGISTRATION [10/2022 - ]