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TYPICAL ENABLING CONDITIONS TYPICAL ENABLING CONDITIONS TYPICAL MALFUNCTION THRESHOLDS TYPICAL MALFUNCTION THRESHOLDS CONDITIONS INSPECTION PROCEDURE 1. CHECK DTC a. Clear DTC (See DTC CHECK/CLEAR ). b. Turn the ignition switch off. c. Disconnect the cable from the negative (-) battery terminal and wait for 1 minute. d. Connect the cable to the negative (-) battery terminal. e. Turn the ignition switch to ON for 10 seconds. f. Turn the ignition switch off. g. Turn the ignition switch to ON. h. Check DTC. OK: P0657 is not present. NG: REPLACE ECM (See REMOVAL ) OK: INTERMITTENT PROBLEMS (See CHECK FOR INTERMITTENT PROBLEMS ) DTC P0724 BRAKE SWITCH B CIRCUIT HIGH DESCRIPTION The purpose of this circuit is to prevent the engine from stalling while driving in the lock-up condition when the When the brake pedal is depressed, this switch sends a signal to the ECM. Then the ECM cancels the operation Required sensors/components (sub) Throttle actuator Frequency of operation Once per driving cycle Duration Within 1 second MIL operation Immediate Sequence of operation None gnition switch From ON to off Throttle actuator power supply 7 V or more
2009 Toyota Tundra 2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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