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

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

1. CHECK CERTIFICATION ECU

(a) Disconnect the G26 certification ECU connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

* *: In order to prevent the battery from being depleted when the vehicle is shipped long distances, a fuse that cuts unnecessary electrical load while the vehicle is being shipped is set in the circuit. If the fuse is removed, the circuit becomes open. If the fuse that is between the battery and terminal CUTB is removed and the circuit is open, the certification ECU changes to a certain control mode (example: the transmission of electric waves every 250 ms. that form the detection area stops).

If the result is not as specified, there may be a malfunction on the wire harness side or the fuse is removed.

(c) Reconnect the G26 certification ECU connector.

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

* *1: For details about the areas that are inside the entry function detection area, refer to Operation Check Operation Check.

* *2: For details about the areas that are outside the entry function detection area, refer to Operation Check Operation Check.

(e) Using an oscilloscope, check waveform 1.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 1 (Reference)

* *: For details about the areas that are inside the entry function detection area, refer to Operation Check Operation Check.

(f) Using an oscilloscope, check waveform 2.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 2 (Reference)

* *: For details about the areas that are outside the entry function detection area, refer to Operation Check Operation Check.

Waveform 2 (Reference)

(g) Using an oscilloscope, check waveform 3.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 3 (Reference)

(h) Using an oscilloscope, check waveform 4.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 4 (Reference)

(i) Using an oscilloscope, check waveform 5.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 5 (Reference)

(j) Using an oscilloscope, check waveform 6.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 6 (Reference)

(k) Using an oscilloscope, check waveform 7.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 7 (Reference)

(l) Using an oscilloscope, check waveform 8.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Text in Illustration

Waveform 8 (Reference)

2. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU Removal from the driver side junction block assembly.

(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) Install the main body ECU Removal to the driver side junction block assembly.

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

If the result is not as specified, the main body ECU (multiplex network body ECU) or driver side junction block assembly may have a malfunction.

(e) Using an oscilloscope, check waveform 1.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 1 (Reference)

(f) Using an oscilloscope, check waveform 2.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 2 (Reference)

(g) Using an oscilloscope, check waveform 3.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 3 (Reference)

(h) Using an oscilloscope, check waveform 4.

HINT
The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 4 (Reference)