WARNING - Diesel Engine
Never work on injection system with engine running or within 30 seconds after shutting off engine. High-pressure pump, rail, injectors and high-pressure pipes are subject to high pressure even after the engine stopped. The fuel jet produced by fuel leaks may cause serious injury, if it touches the body. People using pacemakers should not move than 30cm closer to the ECU or wiring harness within the engine room while engine is running, since the high currents in the electronic engine control system produce considerable magnetic fields.
Kia Cee'd JD Service Manual: Engine Control Module (ECM) Repair procedures
Removal
When replacing the ECM, the vehicle equipped with the immobilizer must
be performed procedure as below.
[In the case of installing used ECM]
1) Perform "ECM Neutral mode" ...
Kia Cee'd JD Service Manual: Repair procedures
Inspection
Signal Circuit Inspection
1.
Check ignition lock switch pull-up voltage
(1)
IG KEY "OFF", ENGINE "OFF".
(2)
Disconnect ignition lock switch connector ...