Engine Immobiliser System

THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM: TERMINALS OF ECU

1. CHECK ENGINE SWITCH





(a) Disconnect the E18 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 E18 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) Using an oscilloscope, check waveform 1.





Waveform 1 (Reference)





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

(f) Using an oscilloscope, check waveform 2.





Waveform 2 (Reference)





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

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)





(a) Disconnect the E29 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 E29 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) Using an oscilloscope, check waveform 1.





Waveform 1 (Reference)





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

(f) Using an oscilloscope, check waveform 2.





Waveform 2 (Reference)





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

3. CHECK ID CODE BOX (IMMOBILISER CODE ECU)





(a) Disconnect the E28 box 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 E28 box connector.

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





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

(e) Using an oscilloscope, check waveform 1.





Waveform 1 (Reference)





(f) Using an oscilloscope, check waveform 2.





Waveform 2 (Reference)





4. CHECK MAIN BODY ECU (COWL SIDE JUNCTION BLOCK LH)





(a) Disconnect the 2D and 2A ECU connectors.

(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 STEERING LOCK ACTUATOR (STEERING LOCK ECU)





(a) Disconnect the E26 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.