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Home >> Lexus >> 2022 >> LS 500h RWD >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System (W/O Advanced Park) - Diagnostic Codes (2 Of 3) >> ELECTRONICALLY CONTROLLED BRAKE SYSTEM (w/o Advanced Park) >> DTC C1315: SMC1 Changeover Solenoid; DTC C1316: SMC2 Changeover Solenoid; DTC C1352: Increasing Pressure Solenoid (FR); DTC C1353: Increasing Pressure Solenoid (FL); DTC C1354: Increasing Pressure Solenoid (RR); DTC C1355: Increasing Pressure Solenoid (RL); DTC C1356: Decreasing Pressure Solenoid (FR); DTC C1357: Decreasing Pressure Solenoid (FL); DTC C1358: Decreasing Pressure Solenoid (RR); DTC C1359: Decreasing Pressure Solenoid (RL) [10/2020 - 10/2023] >> Component Operating Range

Component Operating Range

C12A7 (CASE 1), C12B2 (CASE 1), C12BD (CASE 1), C12C8 (CASE 1), C12D3 (CASE 1), C12DE (CASE 1), C12E9 (CASE 1) AND C12F4 (CASE 1)

Linear solenoid open circuit detection signal Less than 3.91 V
C12A7 (CASE 2 AND 3), C12B2 (CASE 2 AND 3), C12BD (CASE 2 AND 3), C12C8 (CASE 2 AND 3), C12D3 (CASE 2 AND 3), C12DE (CASE 2 AND 3), C12E9 (CASE 2 AND 3) AND C12F4 (CASE 2 AND 3)

Experience of all of the following conditions are met -
Linear solenoid current monitor value Equal to or more 0.4 times the linear solenoid output duty
Linear solenoid current monitor value 0.7 or less
C12A8 (CASE 1), C12B3 (CASE 1), C12BE (CASE 1), C12C9 (CASE 1), C12D4 (CASE 1), C12DF (CASE 1), C12EA (CASE 1) AND C12F5 (CASE 1)

Linear solenoid current monitor value Less than 0.15 A
C12A8 (CASE 2), C12B3 (CASE 2), C12BE (CASE 2), C12C9 (CASE 2), C12D4 (CASE 2), C12DF (CASE 2), C12EA (CASE 2) AND C12F5 (CASE 2)

All of the following conditions are met -
Main relay monitor 3.5 V or more
Command to main relay On
Linear solenoid output duty 0%
Linear solenoid current monitor value Less than 2.3 A
C13CA AND C14F2

Both of the following conditions are met A and B
A. Experience of all of the following conditions are met 0.012 seconds or more
Command to brake pressure control SMC solenoid On
SMC solenoid monitor Less than 4.13 V
B. Experience of all of the following conditions are met 0.012 seconds or more
Command to brake pressure control SMC solenoid Off
SMC solenoid monitor Higher than 4.2 V
C13CB AND C14F3

SMC solenoid open circuit detection signal Higher than 0.1 A
C13CC (CASE 1) AND C14F4 (CASE 1)

SMC solenoid leak detection signal Higher than 11.25 V
C13CC (CASE 2) AND C14F4 (CASE 2)

SMC solenoid over current detection signal Less than 2.3 A
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