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Home >> Lexus >> 2021 >> 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] >> Typical Malfunction Thresholds

Typical Malfunction Thresholds

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 Higher than 3.98 V
C12A7 (CASE 2) C12B2 (CASE 2), C12BD (CASE 2), C12C8 (CASE 2), C12D3 (CASE 2), C12DE (CASE 2), C12E9 (CASE 2) AND C12F4 (CASE 2)

Linear solenoid current monitor value Less than 0.4 times the linear solenoid output duty
C12A7 (CASE 3), C12B2 (CASE 3), C12BD (CASE 3), C12C8 (CASE 3), C12D3 (CASE 3), C12DE (CASE 3), C12E9 (CASE 3) AND C12F4 (CASE 3)

Linear solenoid current monitor value Higher than 0.7 A
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 0.15 A or more
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)

Linear solenoid current monitor value Higher than 2.3 A
C13CA (CASE 1) AND C14F2 (CASE 1)

Both of the following conditions are met -
Command to brake pressure control SMC solenoid On
SMC solenoid monitor Higher than 4.2 V
C13CA (CASE 2) AND C14F2 (CASE 2)

Both of the following conditions are met -
Command to brake pressure control SMC solenoid Off
SMC solenoid monitor Less than 4.13 V
C13CB AND C14F3

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

SMC solenoid leak detection signal Less than 11.29 V
C13CC (CASE 2) AND C14F4 (CASE 2)

SMC solenoid over current detection signal Higher than 2.3 A
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