Typical Enabling Conditions
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
ALL
| All of the following conditions are met | - |
| Write Inhibit | permit |
| Time after Write status forbiddance to permit | 0.5 seconds or more |
| Ignition switch | ON |
| Time after ignition switch is off to ON | 0.5 seconds or more |
| A/D converter fail (P060B) | Not detected |
CASE1
| All of the following conditions are met | - |
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| Engine stop and start ECU internal low side switch for starter relay | OFF |
| Engine stop and start ECU internal limit switch for starter relay | OFF |
| Engine stop and start ECU starter relay terminal voltage level | High |
CASE2
| All of the following conditions are met | - |
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| Engine stop and start ECU internal low side switch for starter relay | OFF |
| Engine stop and start ECU internal limit switch for starter relay | OFF |
| Engine stop and start ECU starter relay terminal voltage level | Low |
CASE3
| All of the following conditions are met | - |
| Engine stop and start ECU internal starter relay circuit check* | Activated |
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| Engine stop and start ECU internal low side switch for starter relay | OFF |
| Engine stop and start ECU internal limit switch for starter relay | ON |
| Engine stop and start ECU starter relay terminal voltage level | Low |
CASE4
| All of the following conditions are met | - |
| Engine stop and start ECU internal starter relay circuit check* | Activated |
| Engine stop and start ECU internal high side switch for starter relay | ON |
| Engine stop and start ECU internal low side switch for starter relay | OFF |
| Engine stop and start ECU internal limit switch for starter relay | ON |
CASE5
| All of the following conditions are met | - |
| Engine stop and start ECU internal starter relay circuit check* | Activated |
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| Engine stop and start ECU internal low side switch for starter relay | ON |
| Engine stop and start ECU internal limit switch for starter relay | ON |
| Engine stop and start ECU starter relay terminal voltage level | Low |
CASE6
| All of the following conditions are met | - |
| Engine stop and start ECU internal high side switch for starter relay | ON |
| Engine stop and start ECU internal low side switch for starter relay | ON |
| Starter relay overcurrent | Not detected |
CASE7
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| *: All of the following conditions are met | - |
| Write Inhibit | permit |
| Time after Write status forbiddance to permit | 0.5 seconds or more |
| Ignition switch | ON |
| Time after ignition switch is off to ON | 0.5 seconds or more |
| Battery voltage | 8 V or higher |
| A/D converter fail (P060B) | Not detected |
| Engine stop and start ECU internal starter relay circuit fail (P1644) | Not detected |
| Engine stop and start ECU processer fail (P0606) | Not detected |
| Lost communication with skid control ECU (brake actuator assembly) (U0129) | Not detected |
| Starter | OFF |
| Engine | Running |
| Fuel cut | OFF |
| One of the following conditions (a), (b) or (c) is met | - |
| (a) Shift position | D range |
| (b) Shift position | R range |
| (c) Shift position | S range |
| Vehicle speed | 7 to 15 km/h (4.3 to 9.3 mph) |
| Engine stop and start ECU starter relay voltage | Higher than [Battery voltage x 0.44] V, and less than [Battery voltage x 0.88] V |
| Engine stop and start ECU internal high side switch for starter relay | OFF |
| Engine stop and start ECU internal low side switch for starter relay | OFF |
| Time after engine stop and start ECU internal limit switch for starter relay OFF to ON | 0.3 seconds or more |
| Time after engine stop and start ECU internal high side switch for starter relay ON to OFF | 0.05 seconds or more |
| Engine stop and start ECU internal limit switch for starter relay | ON |
| Time after engine stop and start ECU internal low side switch for starter relay ON to OFF | 0.05 seconds or more |
| Time after engine stop and start ECU internal limit switch for starter relay ON to OFF | 0.05 seconds or more |