Smart Key System (for Start Function)

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

1. CHECK POWER MANAGEMENT CONTROL ECU





(a) Disconnect the F80 power management control ECU connector.

(b) Measure the voltage and 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 F80 power management control ECU connector.

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





* *: Voltage is output for 0.3 seconds when the engine is cranking. Disconnect the connector from the ECM before measuring the voltage.

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

(e) Using an oscilloscope, check the signal waveform of the ECU.

(1) Waveform 1





Waveform 1 (Reference)





(2) Waveform 2





Waveform 2 (Reference)





HINT
As the vehicle speed increases, the wavelength shortens.

2. CHECK CERTIFICATION ECU





(a) Disconnect the F79 certification ECU connector.

(b) Measure the voltage and 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.

3. CHECK STEERING LOCK ECU





(a) Disconnect the F68 steering lock ECU connector.

(b) Measure the voltage and 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 F68 steering lock 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.