Auto Idle Stop System Symptom Troubleshooting Index (With Auto Idle Stop System) (2022 2023 2024 2025)
When the vehicle has one of these symptoms, do the diagnostic procedure for the symptom, until you find the cause.
Auto Idle Stop System Symptom Troubleshooting Index
| Symptom | Diagnostic Procedure | Also check for |
| Auto idle stop system does not operate | Inspect the auto idle stop system Troubleshoot the auto idle stop system (Auto idle stop system does not operate) |
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| Idle stop time is short | Brake booster leaks: Check the leakage from the following parts, and replace it if necessary - Refer to: BRAKE BOOSTER REMOVAL AND INSTALLATION NOTE: Time that the idling stop operates shortens because it becomes impossible to maintain airtight of the negative pressure line when a small leakage is in the following parts. The following symptoms appear when there is a leakage in following parts. (Small leakage: Idle stop time is short) (Large leakage: Idle stop does not operate) Check valve (built into the vacuum line) Vacuum hose, pipe Vacuum tube (between the brake booster and the brake booster pressure sensor) Brake booster Rod seal or O-ring, or secondary cup of master cylinder Brake booster pressure sensor If equipped, Check the cold storage evaporator installation Troubleshoot the auto idle stop system |
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| Starter system warning message stays on (no DTCs set) | Troubleshoot the auto idle stop system (Starter System Counter Inspection) - Refer to: Auto Idle Stop System Symptom Troubleshooting - Starter System Counter Inspection(With Auto Idle Stop System) (2024 2025) |