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Code
P0685
ECM

Défaut relais d’alimentation calculateur

Le circuit du relais d’alimentation du calculateur a un défaut.

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Most likely causes

  1. Relais défectueux
  2. Câblage

Symptoms you may notice

  • No start
  • ECM not powering up

Checks to run

  1. Test the relay
  2. Check wiring

Tools you may need

Multimeter
Always diagnose before replacing. Codes share symptoms; confirm the cause with measurements before buying parts.

Related codes in ECM

P0601

Erreur mémoire calculateur

 P0606

Défaut processeur calculateur

 P0607

Performance calculateur
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