Door Lock - Smart Key System

DOOR LOCK: SMART KEY SYSTEM: TERMINALS OF ECU

1. CHECK CERTIFICATION ECU





(a) Disconnect the E58 ECU connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.





If the result is not as specified, the wire harness side may have a malfunction.

(c) Reconnect the E58 ECU connector.

(d) Measure the voltage according to the value(s) in the table below.









If the result is not as specified, the ECU may have a malfunction.

(e) Inspect using an oscilloscope.





Waveform 1 (Reference):





(f) Inspect using an oscilloscope.





Waveform 2 (Reference):





2. MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)

(a) Measure the voltage and resistance according to the value(s) in the table below.









If the result is not as specified, the junction block may have a malfunction.