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Home >> Lexus >> 2015 >> NX 200t Base, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Automatic Transmission (U661E) - Diagnostic Codes (1 Of 2)) >> Automatic Transaxle System >> DTC P0703-12: Brake Switch "B" Circuit Short to Battery [10/2014 - ] >> Description

DTC P0703-12: Brake Switch "B" Circuit Short to Battery [10/2014 - ]: Description

WARNING: This page is about a different variant/trim than selected.

The purpose of this circuit is to prevent the engine from stalling when the brakes are suddenly applied while driving in the lock-up condition.

When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation of the lock-up clutch while braking is in progress.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P0703-12 Brake Switch "B" Circuit Short to Battery The stop light switch remains on even when the vehicle is driven in a STOP (less than 3 km/h (1.86 mph)) and GO (30 km/h (18.65 mph) or more) pattern 5 times. (2-trip detection logic)
  • Short in stop light switch signal circuit
  • Stop light switch assembly
  • ECM
Comes on DTC stored SAE: P0724