Smart Key System (for Start Function)

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

TERMINALS OF ECU

1. CHECK POWER MANAGEMENT CONTROL ECU





(a) Disconnect the D42 and D43 connectors.
(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 D42 and D43 connectors.
(d) Measure the voltage and check pulses according to the value(s) in the table below.





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





HINT: The wavelength becomes shorter as the engine speed increases.




(2) Waveform 2








(3) Waveform 3





HINT: The wavelength becomes shorter as the vehicle speed increases.

2. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)





(a) Disconnect the D25 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 D25 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.
3. CHECK STEERING LOCK ACTUATOR ASSEMBLY (STEERING LOCK ECU)





(a) Disconnect the D17 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 D17 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.