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Idle stop time is short (With Auto Idle Stop System) (2018 2019 2020)

Diagnostic procedure

Brake booster leaks :
Check the leakage from the following parts, and replace it if necessary.

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, seal rubber (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 .