Typical Enabling Conditions
WARNING: This page is about a different car, the 2024 Lexus TX 500h. However, it is still accessible from the selected car via links, so may be relevant.
ALL
| DS_active_pressure*1 | TRUE |
| The monitor will run whenever the following DTCs are not stored. | P0986 (Solenoid (SR) valve) P08D2, P08D3 (Solenoid (SC2) valve) P08E4, P08E5 (Solenoid (SC4) valve) P0960, P0962, P0963, P0746 (Solenoid (SL1) valve) P0964, P0966, P0967, P0776 (Solenoid (SL2) valve) P0968, P0970, P0971, P0796 (Solenoid (SL3) valve) P281B, P281D, P281E, P2817 (Solenoid (SL5) valve) P08BF, P08C1, P08C2, P08BB (Solenoid (SL6) valve) P27C5, P27C7, P27C8, P27C1 (Solenoid (SL7) valve) P27CD, P27CF, P27D0, P27C9 (Solenoid (SL8) valve) P2718, P2720 (Solenoid (SLT) valve) P1700 (ECU internal IC circuit) P0605 (Internal control module read only memory (ROM) error) P0604 (Internal control module random access memory (RAM) error) P062F (Internal control module EEPROM) P0840, P0841, P1738, P1739 (Transmission fluid pressure sensor "A" circuit) P0722, P077D, P077C (Output speed sensor circuit) P077A, P077B (Output speed sensor revolution direction) P0717, P07C0, P07BF (Input/turbine shaft speed sensor "A" circuit) |
| One of the following conditions is met | (a), (b) or (c) |
| (a) TCM indicate K0 clutch not release | - |
| (b) TCM indicate start clutch not release | - |
| (c) TCM selected gear not neutral | - |
| Duration time from finishing solenoid electric current cutting circuit | More than 0.5 seconds |
| Either condition is met | (a) or (b) |
| (a) TCM indicate solenoid (SC4) valve ON | - |
| (b) TCM indicate solenoid (SR) valve ON | - |
| TCM indicate not fail-safe RrEV mode*2 | - |
| Shift position | "D" or "R" |
| Transmission fluid temperature | -30°C (-22°F) or higher |
| SL7 current check | Not fixed |
OFF MALFUNCTION (A)
| Actual start clutch pressure | Below 167 kPa (1.7 kgf/cm2 , 24 psi) |
| Solenoid stick prevention control (Solenoid electric current is controlled periodically during start clutch engagement) |
Not active |
| Transmission Fluid Temperature Sensor "A" circuit (P0712, P0713) | Not circuit malfunction |
| Transmission fluid temperature sensor "A" rationality (P0711) | Fail-safe does not active |
OFF MALFUNCTION (B)
| During EG starting sequence | Not active |
| Actual start clutch pressure - TCM indicate pressure value of SL7 | -98 kPa (-1.0 kgf/cm2 , -14 psi) or less |
| Either condition is met | (a) or (b) |
| (a) TCM indicate start clutch slip | - |
| (b) TCM indicate start clutch release | - |
| Either condition is met | (a) or (b) |
| (a) TCM indicate torque capacity value of SL7 | 10 N*m or more |
| (b) Actual start clutch torque capacity calculated by actual start clutch pressure | 10 N*m or more |
| Duration time of TCM indicate start clutch close to slip | 0.46 seconds or more at transmission fluid temperature is 30°C (86°F)) (conditions vary with transmission fluid temperature) |
OFF MALFUNCTION (C)
| During EG starting sequence | Active |
| Actual start clutch pressure - TCM indicate pressure value of SL7 | -98 kPa (-1.0 kgf/cm2 , -14 psi) or less |
| Either condition is met | (a) or (b) |
| (a) TCM indicate start clutch slip | - |
| (b) TCM indicate start clutch release | - |
| Either condition is met | (a) or (b) |
| (a) TCM indicate torque capacity value of SL7 | 10 N*m or more |
| (b) Actual start clutch torque capacity calculated by actual start clutch pressure | 10 N*m or more |
| Duration time of TCM indicate start clutch close to slip | 0.46 seconds or more at transmission fluid temperature is 30°C (86°F)) (conditions vary with transmission fluid temperature) |
ON MALFUNCTION (A)
| During EG starting sequence | Not active |
| Actual start clutch pressure - TCM indicate pressure value of SL7 | 98 kPa (1.0 kgf/cm2 , 14 psi) or higher |
| Either condition is met | (a) or (b) |
| (a) TCM indicate start clutch slip | - |
| (b) TCM indicate start clutch release | - |
| Either condition is met | (a) or (b) |
| (a) TCM indicate torque capacity value of SL7 | 10 N*m or more |
| (b) Actual start clutch torque capacity calculated by actual start clutch pressure | 10 N*m or more |
| Duration time of TCM indicate start clutch close to slip | 0.46 seconds or more at transmission fluid temperature is 30°C (86°F)) (conditions vary with transmission fluid temperature) |
ON MALFUNCTION (B)
| During EG starting sequence | Not active |
| Actual start clutch pressure - TCM indicate pressure value of SL7 | 98 kPa (1.0 kgf/cm2 , 14 psi) or higher |
| Either condition is met | (a) or (b) |
| (a) TCM indicate start clutch slip | - |
| (b) TCM indicate start clutch release | - |
| Either condition is met | (a) or (b) |
| (a) TCM indicate torque capacity value of SL7 | 10 N*m or more |
| (b) Actual start clutch torque capacity calculated by actual start clutch pressure | 10 N*m or more |
| Duration time of TCM indicate start clutch close to slip | 0.46 seconds or more at transmission fluid temperature is 30°C (86°F)) (conditions vary with transmission fluid temperature) |
HINT:
*1: Following condition (1) or condition (2) is met
CONDITION (1)
| Following condition is met | 2 seconds or more |
| Auxiliary battery voltage | 9.5 V or higher |
| Drive motor "A" revolution | 500 rpm or more |
| Lost communication with drive motor control module "A" (ch4) (U117E) | Not detected |
| Drive motor "A" revolution sensor (P06B0, P06D6, P0A1B, P0A3F, P0A40, P0A41, P0A42, P0C50, P0C52, P0C53, P0C5A, P0C5C, P0C5D, P1C2B, P1CAD, P1CB0) | Not system down |
CONDITION (2)
| Following condition is met | 0.7 seconds or more at transmission fluid temperature 30°C (86°F) (conditions vary with transmission fluid temperature) |
| Auxiliary battery voltage | 9.5 V or higher |
| Electric/auxiliary transmission fluid pump "A" motor (P18C2, P18C7, P18CC, P18C1, P18CB, P18C3, P18C8, P18CD, P18C9, P18CE, P18D2, P18D3, P18D5, P18D7, P18D6, P2797, P18C6, P18C4, P18D1, P18D4, U117F, P3176, P3177, P317E) | Not system down |
| Electric/auxiliary transmission fluid pump "A" motor is not shutdown | - |
| Either condition is met | (a) or (b) |
| (a) Solenoid (SRL1) valve (P0974) | Not circuit malfunction |
| (b) Solenoid (SRL1) valve (P0751) | Fail-safe does not active |
| Solenoid (SRL1) valve | OFF |
| Target electric/auxiliary transmission fluid pump "A" motor speed | 100 rpm or more |
| Lost communication with electric/auxiliary transmission fluid pump (U116B) | Not detected |
*2: Fail-safe RrEV mode
| All of the following conditions are met | (a), (b), (c) and (d) |
| (a) Engine operating mode | Stop |
| (b) TCM indicate start clutch release | - |
| (c) TCM indicate gear is neutral | - |
| (d) Only drive motor "B" provides the driving force | - |