P0686 SUZUKI Engine Control Ignition Relay Control Circuit Low Voltage

Possible causes
– Weak battery- Low voltage while cranking
– Faulty Engine Control Module (ECM) relay
– Blown ECM fuse
– Faulty ECM
– ECM harness is open or shorted
– ECM circuit poor electrical connection
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
P0686 SUZUKI OBD Code Description

The Engine Control Module (ECM) has detected a low voltage condition to the ECM.