Smart Key System (for Entry Function)

THEFT DETERRENT / KEYLESS ENTRY: SMART KEY SYSTEM (for Entry Function): TERMINALS OF ECU

1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the E36 certification ECU (smart key ECU assembly) connector.





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





* *1: for TMC Made

* *2: Except for TMC Made

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

(d) Reconnect the E36 certification ECU (smart key ECU assembly) connector.

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









* *1: for TMC Made

* *2: Except for TMC Made

(f) If the result is not as specified, the certification ECU (smart key ECU assembly) may have a malfunction.

(g) Inspect using an oscilloscope.

Waveform 1 (Reference):

(h) 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.









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