Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

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

*A

Main Body ECU (Multiplex Network Body ECU) with 2 Connectors

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-

*1

Main Body ECU (Multiplex Network Body ECU)

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-

*a

2 Connectors

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-

*A

Main Body ECU (Multiplex Network Body ECU) with 1 Connector

-

-

*1

Main Body ECU (Multiplex Network Body ECU)

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-

*a

1 Connector

-

-

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

Click here

(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

Terminal Description

Condition

Specified Condition

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-30 (ACC) - Body ground

-

ACC power supply

Engine switch on (ACC)

11 to 14 V

MB-30 (ACC) - Body ground

-

ACC power supply

Engine switch off

Below 1 V

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

IG power supply

Engine switch on (IG)

11 to 14 V

MB-32 (IG) - Body ground

-

IG power supply

Engine switch off

Below 1 V

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

Click here

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

3D-14 (LSR) - Body ground

LG - Body ground

Rear door LH/RH unlock detection switch input

Rear door LH or RH unlocked

Below 1 V

3D-14 (LSR) - Body ground

LG - Body ground

Rear door LH/RH unlock detection switch input

Rear door LH and RH locked

Pulse generation

3D-13 (LSFL) - Body ground

B - Body ground

Front door LH unlock detection switch input

Front door LH unlocked

Below 1 V

3D-13 (LSFL) - Body ground

B - Body ground

Front door LH unlock detection switch input

Front door LH locked

Pulse generation

3D-12 (LSFR) - Body ground

GR - Body ground

Front door RH unlock detection switch input

Front door RH unlocked

Below 1 V

3D-12 (LSFR) - Body ground

GR - Body ground

Front door RH unlock detection switch input

Front door RH locked

Pulse generation

F15-2 (UL3) - Body ground

L - Body ground

Driver door key-linked unlock input

Driver door key cylinder in neutral position → on (unlock)

Pulse generation → Below 1 V

F15-29 (L2) - Body ground

G - Body ground

Driver door key-linked lock input

Driver door key cylinder in neutral position → on (lock)

Pulse generation → Below 1 V

F15-6 (FLCY) - Body ground

R - Body ground

Front door courtesy light switch (for LH) input

Front door LH open

Below 1 V

F15-6 (FLCY) - Body ground

R - Body ground

Front door courtesy light switch (for LH) input

Front door LH closed

Pulse generation

F15-27 (FRCY) - Body ground

BR - Body ground

Front door courtesy light switch (for RH) input

Front door RH open

Below 1 V

F15-27 (FRCY) - Body ground

BR - Body ground

Front door courtesy light switch (for RH) input

Front door RH closed

Pulse generation

3H-24 (LCTY) - Body ground

BR - Body ground

Rear door courtesy light switch (for LH) input

Rear door LH open

Below 1 V

3H-24 (LCTY) - Body ground

BR - Body ground

Rear door courtesy light switch (for LH) input

Rear door LH closed

Pulse generation

3A-31 (RCTY) - Body ground

BR - Body ground

Rear door courtesy light switch (for RH) input

Rear door RH open

Below 1 V

3A-31 (RCTY) - Body ground

BR - Body ground

Rear door courtesy light switch (for RH) input

Rear door RH closed

Pulse generation

3H-34 (BCTY) - Body ground

SB - Body ground

Back door courtesy light switch input

Back door open

Below 1 V

3H-34 (BCTY) - Body ground

SB - Body ground

Back door courtesy light switch input

Back door closed

Pulse generation

3H-20 (TR+) - Body ground

Y - Body ground

Back door lock motor drive output

Back door closed → open

Below 1 V → 11 to 14 V → Below 1 V

3H-8 (ACT-) - Body ground

LA-B - Body ground

Door lock motor unlock drive output

Door control switch or driver door key cylinder off → on (unlock)

Below 1 V → 11 to 14 V → Below 1 V

3H-9 (ACT-) - Body ground

B - Body ground

Door lock motor unlock drive output

Door control switch or driver door key cylinder off → on (unlock)

Below 1 V → 11 to 14 V → Below 1 V

3H-18 (ACT+) - Body ground

R - Body ground

Door lock motor lock drive output

Door control switch or driver door key cylinder off → on (lock)

Below 1 V → 11 to 14 V → Below 1 V

3H-6 (ACT+) - Body ground

R - Body ground

Door lock motor lock drive output

Door control switch or driver door key cylinder off → on (lock)

Below 1 V → 11 to 14 V → Below 1 V

3D-4 (ACTD) - Body ground

B - Body ground

Door lock motor unlock drive output

Door control switch or driver door key cylinder off → on (unlock)

Below 1 V → 11 to 14 V → Below 1 V

3F-29 (BZR) - Body ground

L - Body ground

Wireless door lock buzzer signal

Wireless door lock buzzer off

Below 1 V

3F-29 (BZR) - Body ground

L - Body ground

Wireless door lock buzzer signal

Wireless door lock buzzer on

Pulse generation

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the F1 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

Terminal Description

Condition

Specified Condition

F1-4 (+B) - Body ground

L - Body ground

Battery power supply

Always

11 to 14 V

F1-18 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the F1 certification ECU (smart key ECU assembly) connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

M67-18 (RCO) - F1-18 (E)

LG - W-B

Output to electrical key and TPMS receiver assembly

(Power supply for electrical key and TPMS 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

Below 1 V → 4.5 to 5.5 V

M67-20 (CSEL) - F1-18 (E)

V - W-B

Communication channel switching circuit

Procedure:
  1. Turn engine switch off
  2. Close all doors

No pulse generation → Pulse generation

M67-19 (RDAM) - F1-18 (E)

GR - W-B

Electrical key and TPMS receiver assembly communication circuit

Procedure:
  1. Turn engine switch off
  2. All doors locked
  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

11 to 14 pulse generation at regular intervals → Pulse generation

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