Smart Key System (for Entry Function)

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

1. CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the A43 and I78 certification ECU (smart key ECU assembly) connectors.

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

HINT
Measure the values on the wire harness side with the connector disconnected.

* *: In order to prevent the vehicle 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 vehicle battery and terminal CUTB is removed and the circuit is open, the certification ECU (smart key ECU assembly) changes to a certain control mode (example: the transmission of electric waves every 0.25 seconds. 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 A43 and I78 certification ECU (smart key ECU assembly) connectors.

(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.

* *3: For details about the areas that are inside the wireless function operational 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)

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

(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)

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

* *2: For details about the areas that are inside the wireless function operational area, refer to Operation Check Operation Check.

(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)

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

* *2: For details about the areas that are inside the wireless function operational area, refer to Operation Check Operation Check.

2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

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

HINT
Measure the values on the wire harness side with the connector disconnected.

If the result is not as specified, there may be a malfunction in the wire harness.

(c) Install the main body ECU (multiplex network body ECU) to the instrument panel junction block assembly.

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

* *: w/ Passenger Door Lock Switch

If the result is not as specified, the main body ECU (multiplex network body ECU) or instrument panel 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)

* *: w/ Passenger Door Lock Switch

(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)