Engine Immobiliser System (w/ Smart Key System)

ENGINE IMMOBILISER: ENGINE IMMOBILISER SYSTEM (w/ Smart Key System): TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK ENGINE SWITCH





(a) Disconnect the E52 switch connector.
(b) Measure the resistance according to the value(s) in the table below.





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

(c) Reconnect the E52 switch connector.
(d) Measure the resistance and voltage according to the value(s) in the table below.





HINT: *: Remove the key battery before performing this inspection.

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

(e) Inspect using an oscilloscope.




(1) Waveform 1 (Reference)





HINT: *: Remove the key battery before performing this inspection.




(2) Waveform 2 (Reference)





HINT: *: Remove the key battery before performing this inspection.

2. CHECK CERTIFICATION ECU





(a) Disconnect the E58 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.





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

(c) Reconnect the E58 ECU connector.
(d) Measure the resistance and voltage according to the value(s) in the table below.





HINT: *: Remove the key battery before performing this inspection.

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

(e) Inspect using an oscilloscope.




(1) Waveform 1 (Reference)





HINT: *: Remove the key battery before performing this inspection.




(2) Waveform 2 (Reference)





HINT: *: Remove the key battery before performing this inspection.

3. CHECK ID CODE BOX





(a) Disconnect the E50 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.





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

(c) Reconnect the E50 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.




(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)






4. CHECK STEERING CONTROL ECU





(a) Disconnect the E51 ECU connector.
(b) Measure the resistance and voltage according to the value(s) in the table below.





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

5. CHECK ECM





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





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

(b) Inspect using an oscilloscope.




(1) Waveform 1 (Reference)









(2) Waveform 2 (Reference)






6. CHECK MAIN BODY ECU (INSTRUMENT PANEL J/B)
(a) Disconnect the IF and IM junction block connectors.
(b) Disconnect the E8, E7 and E6 main body ECU connectors.





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





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