Door Lock - Smart Key System

DOOR LOCK: SMART KEY SYSTEM: TERMINALS OF ECU

1. CHECK CERTIFICATION ECU





(a) Disconnect the D39 and D40 ECU connectors.

(b) Measure the resistance and voltage of each terminal of the wire harness side connector.

Standard:





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the D39 and D40 ECU connectors.

(d) Measure the voltage and frequency of each terminal of the connector.

Standard:









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

(e) Inspect using oscilloscope.





Waveform 1 (Reference):





(f) Inspect using oscilloscope.





Waveform 2 (Reference):





2. CHECK ID CODE BOX





(a) Disconnect the D29 ID code box connector.

(b) Measure the resistance of each terminal of the wire harness side connector.

Resistance:





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the D29 ECU connector.

(d) Measure the voltage of each terminal of the connector.

Standard:





If the result is not as specified, the ID code box may have a malfunction.

(e) Inspect using oscilloscope.





Waveform 1 (Reference):





(f) Inspect using oscilloscope.





Waveform 2 (Reference):





3. CHECK POWER SOURCE CONTROL ECU





(a) Disconnect the D44 ECU connector.

(b) Measure the resistance of each terminal of the wire harness side connector.

Resistance:





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the D44 ECU connector.

(d) Measure the voltage and frequency of each terminal of the connector.

Voltage:





If the result is not as specified, there may be a malfunction on the wire harness side.

4. CHECK STEERING LOCK ECU

(a) Measure the voltage of the connectors.

Voltage:





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

5. CHECK ECM





(a) Disconnect the B50 ECM connector.

(b) Measure the resistance between each terminal of the wire harness side connectors and body ground.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the B50 ECM connector.

(d) Measure the voltage and resistance between each terminal of the wire harness side connectors and body ground.





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

(e) Inspect using an oscilloscope.

(1) Waveform 1 (Reference):









(2) Waveform 2 (Reference)