Inspection of Keyless Start Control Module and Its Circuit

Inspection of Keyless Start Control Module and Its Circuits

Voltage and Signal Check

Check voltage and/or pulse signal of keyless start control module (3) using voltmeter (1) and oscilloscope (2).

NOTE:

- Check that battery voltage is 11 V or more.
- For "Ignition mode" described in the following table, it means power supply mode in keyless push start system.
For more details of ignition mode, refer to Description of Keyless Engine Start Function Description of Keyless Engine Start Function.
- Voltage of terminal with asterisk (*) cannot be measured by voltmeter because it is pulse signal. Check it with oscilloscope if necessary.





























Reference Waveform

Oscilloscope display

Shown below is typical waveform display provided by oscilloscope.

NOTE:

- Display includes the following types of data:










- Waveforms may vary with measurement conditions and vehicle specifications.

CAN communication signal

CAN communication signal (high) (1):





CAN communication signal (low) (2):





Measurement condition

- Ignition mode: ON





Mid inside antenna signal

Mid inside antenna (+) signal (1):





Mid inside antenna (-) signal (2):





Measurement condition

- Any one of doors: Open -> Close






Rear inside antenna signal

Rear inside antenna (+) signal (1):





Rear inside antenna (-) signal (2):





Measurement condition

- Any one of doors: Open -> Close






Rear outside antenna signal

Rear outside antenna (+) signal (1):





Rear outside antenna (-) signal (2):





Measurement condition

- Remote controller: Within rear outside antenna detection range
- Trunk lid request switch: ON






Driver's side outside antenna signal and passenger's side outside antenna signal

Driver's side outside antenna (+) signal (1):





Driver's side outside antenna (-) signal (2):





Measurement condition

- Remote controller: Within driver's side outside antenna detection range
- Driver side door request switch: ON

Passenger's side outside antenna (+) signal (1):





Passenger's side outside antenna (-) signal (2):





Measurement condition

- Remote controller: Within passenger's side outside antenna detection range
- Passenger side door request switch: ON






Door lock switch signal, trunk lid switch signal and door switch signal

Driver side door lock switch signal:





Measurement condition

- Driver side door lock switch: Lock

Trunk lid switch signal:





Measurement condition

- Trunk lid: Close

Rear door switch signal (R):





Measurement condition

- Rear door (R): Close

Driver side door switch signal:





Measurement condition

- Driver side door: Close

Passenger side door lock switch signal:





Measurement condition

- Passenger side door lock switch: Lock

Rear door switch signal (L):





Measurement condition

- Rear door (L): Close

Passenger side door switch signal:





Measurement condition

- Passenger side door: Close






Keyless entry / TPMS receiver signal

Power supply for keyless entry / TPMS receiver (1):





Keyless entry / TPMS receiver signal (2):





Measurement condition

- Remote controller: Any one of the buttons is pushed






Door key cylinder switch signal

Door key cylinder switch (Unlock) signal:





Measurement condition

- Door key cylinder switch (Unlock): OFF

Door key cylinder switch (Lock) signal:





Measurement condition

- Door key cylinder switch (Lock): OFF





LIN communication signal





Measurement condition

- Ignition mode: ON