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C1513 Brake switch error
AutoHex Online Help: Hyundai TUCSON(JM) 2010
Component Location
General Description
The brake light switch indicates brake pedal status to the ABS control unit. The switch is turned on when brake is depressed. The brake light switch is a normally-open contact which runs to battery voltage when active (brake depressed). When passive (brake not depressed), the cable is grounded via the break light bulbs.
DTC Description
The brake light signal is a reference to judge driver’s will for braking. ABS ECU monitor open circuit of brake light switch for normal ABS control. HECU set the warning lamp if either BLS or BS is fault.
DTC Detecting Condition
Item | Detecting Condition | Possible cause |
DTC Strategy | ? Open circuit monitoring | ? Open circuit in brake switch line ? Faulty brake light switch ? Faulty input stage in HECU |
Detect Mode | ? Initial Check ? Outside the ABS control cycle ? Inside the ABS control cycle ? Diagnosis mode ? Failure mode |
Enable Conditions | ? If both BLS and BS have a same state for predetermined time, The failure is recognized. ? Outside an ABS/BTCS/ESP control, And after normal operation of MCP, If the pressure sensor ? signal is higher than 20bar and BLS is low for 3sec, ECU detect the failure If the BLS/BS changed more than 40 times for 5sec, ECU detect the failure. ? While Vref>10KPH, TPS>5%, MCP<7bar, if BLS is high over 1 minute, ECU detect the failure. |
Fail Safe | ? Inhibit the ESP control and allow the ABS/TCS/EBD control. Meanwhile, stop checking the TCS/ESP switch failure under the ESP control. ? The ESP warning lamps are activated. |
Schematic Diagram