Diagnostic aids
WARNING: This page is about a different car, the 2004 Suzuki Vitara. However, it is still accessible from the selected car via links, so may be relevant.
Typical causes of DTC C1258.
- Poor terminal connection at EBCM.
- Faulty ECM (PCM).
- Faulty EBCM.
- High resistance between ECM (PCM) and EBCM.