Toyota Yaris: Stop And Start System / Terminals Of Ecu

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / Terminals Of Ecu

TERMINALS OF ECU

ENGINE STOP AND START ECU

(a) Disconnect the engine stop and start ECU connectors.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A66-1 (BIN2) - Body ground

Auxiliary battery

Always

9.5 to 14 V

A66-2 (GND2) - Body ground

Ground

Always

Below 1 Ω

A66-3 (BIN1) - Body ground

Auxiliary battery

Always

9.5 to 14 V

A66-8 (GND1) - Body ground

Ground

Always

Below 1 Ω

A67-1 (+B) - Body ground

Power source of engine stop and start ECU

Ignition switch ON

9.5 to 14 V

A67-6 (DGND) - Body ground

Ground

Always

Below 1 Ω

A67-10 (NE) - Body ground

Engine speed signal from ECM

Always

Pulse generation

(see waveform 1)

H43-13 (CANH) - Body ground

CAN communication

Always

200 Ω or higher

H43-14 (CANL) - Body ground

CAN communication

Always

200 Ω or higher

H43-15 (LC1H) - Body round

Local bus communication line

Always

200 Ω or higher

H43-16 (LC1L) - Body round

Local bus communication line

Always

200 Ω or higher

H43-18 (IGP) - Body ground

Ignition switch signal

Ignition switch ON

9.5 to 14 V

H43-19 (ACC) - Body ground

Ignition switch signal

Ignition switch ACC

9.5 to 14 V

H43-21 (IGR) - Body ground

Ignition switch signal

Ignition switch ON

9.5 to 14 V

(c) Reconnect the engine stop and start ECU connectors.

(d) Measure the resistance, voltage and pulse according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A67-3 (BRE2) - Body ground

Ground (vacuum sensor assembly)

Always

Below 1 Ω

A67-7 (BNT1) - A67-6 (DGND)

Engine hood courtesy switch (hood lock assembly) signal

  • Ignition switch ON
  • Engine stopped
  • Engine hood closed

Below 1.5 V

  • Ignition switch ON
  • Engine stopped
  • Engine hood open

8 to 14 V

A67-8 (TMN) - A67-25 (TME2)

Neutral position switch signal

  • Ignition switch ON
  • Shift lever in neutral

2.7 to 4.3 V

  • Ignition switch ON
  • Shift lever in any other than neutral

0.7 to 1.9 V

A67-10 (NE) - A67-6 (DGND)

Engine speed signal from ECM

Idling after engine warmed up

Pulse generation

(See waveform 1)

A67-13 (PB) - A67-3 (BRE2)

Vacuum sensor assembly signal

  • Ignition switch ON
  • Absolute pressure of 40 kPa (300 mmHg, 11.8 in.Hg) applied to vacuum sensor assembly

1.6 to 2.0 V

  • Ignition switch ON
  • Absolute pressure of 60 kPa (450 mmHg, 17.7 in.Hg) applied to vacuum sensor assembly

2.2 to 2.6 V

  • Ignition switch ON
  • Atmospheric pressure applied to vacuum sensor assembly

3.4 to 3.8 V

A67-14 (BRVC) - A67-6 (DGND)

Vacuum sensor assembly power supply

  • Ignition switch ON
  • Engine stopped

4.5 to 5.5 V

A67-17 (CLL) - A67-6 (DGND)

Clutch switch assembly signal

  • Ignition switch ON
  • Clutch pedal released

8 to 14 V

  • Ignition switch ON
  • Clutch pedal fully depressed

Below 1.5 V

A67-19 (DON2) - A67-6 (DGND)

External backup boost converter (eco run vehicle converter assembly) signal

Engine running

Pulse generation

(See waveform 2)

A67-21 (STA) - A67-6 (DGND)

Starter pinion operation signal

Cranking

6.0 V or more

A67-26 (TMVC) - A67-6 (DGND)

Neutral position switch power supply

  • Ignition switch ON
  • Engine stopped

4.5 to 5.5 V

H43-23 (IG31) - A67-6 (DGND)

Backup boost converter signal

Ignition switch ON

10.5 to 16 V

H43-3 (IG41) - A67-6 (DGND)

Backup boost converter signal

Ignition switch ON

10.5 to 16 V

H43-5 (ECAN) - A67-6 (DGND)

Stop and start system cancel switch (combination switch assembly) signal

  • Ignition switch ON
  • Stop and start system cancel switch (combination switch assembly) pressed

Below 1.5 V

  • Ignition switch ON
  • Stop and start system cancel switch (combination switch assembly) not pressed

8 to 14 V

H43-10 (IG12) - A67-6 (DGND)

Backup boost converter signal

Ignition switch ON

10.5 to 16 V

H43-11 (B43) - A67-6 (DGND)

Backup boost converter signal

Always

10.5 to 16 V

H43-18 (IGP) - A67-6 (DGND)

Ignition switch signal

Ignition switch ACC

Below 1 V

Ignition switch ON

9.5 to 14 V

H43-19 (ACC) - A67-6 (DGND)

Ignition switch signal

Ignition switch off

Below 1 V

Ignition switch ACC

9.5 to 14 V

H43-21 (IGR) - A67-6 (DGND)

Ignition switch signal

Ignition switch ACC

Below 1 V

Ignition switch ON

9.5 to 14 V

H43-23 (IG31) - A67-6 (DGND)

Backup boost converter signal

Ignition switch ON

10.5 to 16 V

(e) Waveform 1

Item

Content

Tester Connection

A67-10 (NE) - A67-6 (DGND)

Tool Setting

5 V/DIV., 2 ms./DIV.

Condition

Idling after engine warmed up

(f) Waveform 2

Item

Content

Tester Connection

A67-19 (DON2) - A67-6 (DGND)

Tool Setting

5 V/DIV., 2 ms./DIV.

Condition

Engine running

    Problem Symptoms Table

    PROBLEM SYMPTOMS TABLE Stop and Start System Symptom Suspected Area Link Stop and start system does not operate Refer to "Stop and Start System does not Operate" Refer to "Stop and Start System does not Operate (Battery Condition)" Restarting after a short period of time from an idling stop Refer to "Restarting after a Short Period of Time from an Idling Stop" After engine stops due to stop and start system, engine does not restart Refer to "After Engine Stops due to Stop and Start System, Engine does not Restart" Failure to restart from IG-ON engine stall Refer to "Failure to Restart from IG-ON Engine Stall" Stop and start cancel indicator does not operate Combination meter assembly Indicator circuit (CAN communication system) Engine stop and start ECU Stop and start indicator does not operate Combination meter assembly Indicator circuit (CAN communication system) Engine stop and start ECU Stop and start control cannot be canceled ECAN terminal voltage Stop and start cancel switch circuit Multi-information display screen does not change after pressing steering pad switch assembly...

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