W/Harness Inspection

Smart Key Unit
B2120 SMK IGN1 Control Output Fault - Inspection/Repair:_:W/Harness Inspection

Terminal & Connector Inspection

1. Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?






Power circuit inspection

CHECK POWER TO Relay IG1
1. IG "ON" & ENG "OFF".
2. Disconnect "PDM RELAY BOX" connector.
3. Check the voltage between the power of the IG1 connecter in the engine room's fuse box and the vehicles body circuit.

Specification :approx. B+








4. 5. Is voltage within specifications ?





Check the open of the IG1 relay
1. Ignition "OFF".
2. Take off the connects of "the PDM relay box" and "the Smartkey unit (SMK IMMO unit)".
3. Measure the resistance between the switch of the PDM relay box IG1 and the IG1 circuit of the Smartkey unit. (SMK IMMO unit)
4. Measure the resistance between the connect coil of the PDM relay box IG1 and the IG1 circuit of the Smartkey unit. (SMK IMMO unit)

SpecificationAbout below 1Ohms








5. Is the measured resistance within specifications ?