Changan CS75 PLUS: SMART key not detected or no start with a low key battery

Changan CS75 PLUS: SMART key not detected or no start with a low key battery

Symptoms

• The vehicle does not detect the SMART key in a low key battery situation. ^[1]

Possible causes

• The manual lists an exhausted key battery as one no-start branch while retaining other starting conditions. ^[1]

Checks

• Check the key battery charge, recognition and backup starting method; do not attribute all failures to start to the key. ^[1]

What to do

• Address the battery according to the actual vehicle's key requirements; continue professional inspection if the abnormality persists. ^[1]

Applicability and limits

• Only applies to the corresponding CS75 PLUS configuration in the Russian-language CS75plus manual from the official Russian website, revised June 2024; the manual date is not treated as an applicable model year. No actual vehicle model has been linked. Do not extend to vehicles with the same model name, other powertrains or other markets. Scope: unknown ^[1]
• Only applies to the specific configuration in the cited manual; do not assume applicability to all vehicles with the same model name.

Related part categories

• Low-voltage system / Smart key battery / Keys and body electrics ^[1]

Sources

[Source 1] CHANGAN CS75plus Official Russian-language Owner's Manual (revised June 2024) — PDF pp.44–45 / printed pp.42–43, Замена элемента питания SMART-ключа; pp.147 / printed pp.145, Двигатель не запускается (accessed 2026-11-01)
https://changanauto.ru/storage/model/manual/WSgnpgLSAb6KH8FbBDMEjFC1KkjFveFgUSeRPynd.pdf