Toyota ZZT230 series Repair Manual page 405

Dl-194
DTC P1520
CIRCUIT DESCRIPTION
The purpose of this circuit is to prevent the engine from stalling, while driving in lock-up condition, when
brakes are suddenly applied.
When the brake pedal is operated, this switch sends a signals to ECM. Then the ECM cancels operation
of the lock-up clutch while braking is in progress.
DTCNo.
No stop light switch signal to ECM during drtving.
P1520
(2-trip detection logic)
WIRING DIAGRAM
See page 01-130.
INSPECTION PROCEDURE
See page Dl-130.
Stop Light Switch Signal Malfunction
DTC Detecting Condition
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AUTOMATIC TRANSAXLE lU240El
•Open or short in stop light switch circuit
•Stop H ght switch
•ECM
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Trouble Area