Last Modified: 11-20-2023 6.11:8.1.0 Doc ID: RM10000000134PZ
Model Year Start: 2018 Model: Camry Prod Date Range: [03/2017 -           ]
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (w/ Smart Key System): TERMINALS OF ECU; 2018 - 2024 MY Camry [03/2017 -        ]

TERMINALS OF ECU

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.

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(b) Reconnect the instrument panel junction block assembly connectors.

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

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

MB-11 (GND1) - Body ground

-

-

Ground

Always

Below 1 Ω

-

MB-30 (ACC) - Body ground

-

Input

ACC power supply

Engine switch on (ACC)

11 to 14 V

ACC SW

Engine switch off

Below 1 V

MB-31 (BECU) - Body ground

-

Input

Battery power supply

Always

11 to 14 V

-

MB-32 (IG) - Body ground

-

Input

IG power supply

Engine switch on (IG)

11 to 14 V

IG SW

Engine switch off

Below 1 V

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

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(e) Measure the voltage and check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

3C-29 (BZR) - Body ground

L - Body ground

Output

Wireless door lock buzzer output

Active Test Wireless Buzzer is OFF

Below 1 V

-

Active Test Wireless Buzzer is ON

Pulse generation

(frequency: 2 kHz, high voltage: 11 to 14 V, low voltage: below 1 V)

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the K62 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

K62-4 (+B) - Body ground

W - Body ground

Input

Battery power supply

Always

11 to 14 V

-

K62-18 (E) - Body ground

W-B - Body ground

-

Ground

Always

Below 1 Ω

-

(c) Reconnect the K62 certification ECU (smart key ECU assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Input/Output

Terminal Description

Condition

Specified Condition

Related Data List Item

R8-18 (RCO) - K62-18 (E)

B - W-B

Output

Output to electrical key and tire pressure monitoring system receiver assembly

(Power supply for electrical key and tire pressure monitoring system receiver assembly. Certification ECU (smart key ECU assembly) outputs 5 V when receiver starts operating.)

Procedure:

  1. Turn engine switch off
  2. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  3. Press lock or unlock switch of electrical key transmitter sub-assembly

Plus generation (See waveform 1)

-

R8-19 (RDAM) - K62-18 (E)

G - W-B

Input

Electrical key and tire pressure monitoring system receiver assembly communication circuit

Procedure:

  1. Turn engine switch off
  2. Lock all doors
  3. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  4. Press lock or unlock switch of electrical key transmitter sub-assembly

Plus generation (See waveform 2)

-

R8-20 (CSEL) - K62-18 (E)

BE - W-B

Output

Communication channel switching circuit

Procedure:

  1. Turn engine switch off
  2. Close all doors

No pulse generation → Pulse generation

-

(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.

*a

Before lock or unlock switch of electrical key transmitter sub-assembly pressed

*b

After lock or unlock switch of electrical key transmitter sub-assembly pressed

Waveform 1 (Reference)

Item

Content

Tester connection

R8-18 (RCO) - K62-18 (E)

Tool setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

  1. Turn engine switch off
  2. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  3. Press lock or unlock switch of electrical key transmitter sub-assembly

(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.

*a

Before lock or unlock switch of electrical key transmitter sub-assembly pressed

*b

After lock or unlock switch of electrical key transmitter sub-assembly pressed

Waveform 2 (Reference)

Item

Content

Tester connection

R8-19 (RDAM) - K62-18 (E)

Tool setting

5 V/DIV., 500 ms/DIV.

Condition

Procedure:

  1. Turn engine switch off
  2. Lock all doors
  3. Bring electrical key transmitter sub-assembly outside detection area but within wireless function operational area
  4. Press lock or unlock switch of electrical key transmitter sub-assembly