Smart Access System With Push-Button Start (for Start Function)

THEFT DETERRENT / KEYLESS ENTRY: SMART ACCESS SYSTEM WITH PUSH-BUTTON START (for Start Function): TERMINALS OF ECU

HINT
* For the layout of the certification ECU terminals, refer to the following Smart Access System With Push-Button Start (for Entry Function).
* For the layout of the ID code box terminals, refer to the following Smart Access System With Push-Button Start (for Entry Function).
* For the layout of the steering lock ECU terminals, refer to the following Steering Lock System.

1. CHECK POWER MANAGEMENT CONTROL ECU





(a) Disconnect the G38 and G39 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 in the wire harness.

(c) Reconnect the G38 and G39 connectors.

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









HINT
* *1: When the shift lever is in P and the engine switch is off, if any door is opened or closed, the steering is locked. When the key is inside the vehicle and the engine switch is turned on (ACC) or on (IG), the steering unlocks.
* *2: When the engine is cranking, the battery voltage may momentarily drop to approximately 6 V.
* *3: The steering lock motor operates when the following conditions are met and a door is opened:
* The shift lever is in P.
* While carrying the key, the engine switch is turned on (IG) to unlock the steering, and then the engine switch is turned off.

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

(1) Waveform 1









HINT
The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2









Text in Illustration





(3) Waveform 3









Text in Illustration





(4) Waveform 4









HINT
The wavelength becomes shorter as the vehicle speed increases.