Toyota CH-R Service Manual: Terminals Of Ecu

TERMINALS OF ECU

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the M66, M67 and F1 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.

Tester Connection

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item

M66-20 (STA) - Body ground

Input

LG - Body ground

When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".

20°C (68°F)

101.69 to 153.85 Ω

-

M66-9 (STAR) - Body ground

Input/Output

W - Body ground

Outputs voltage to the starter relay

  • Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 1000 rpm.)

HINT:

When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.

Shift lever in any position other than P or N → Shift lever in P or N (at 20°C (68°F))

10 kΩ or higher → 101.69 to 153.85 Ω

-

Receives neutral start switch (P, N position detection) signal

  • Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

Perform the following operations except while the engine is cranking:

  • Shift lever in any position other than P or N → Shift lever in P or N (at 20°C (68°F))

30 kΩ or higher → 101.69 to 153.85 Ω

Neutral SW/ Clutch SW

M66-16 (NE) - Body ground

Input

GR - Body ground

Engine speed signal

Always

10 kΩ or higher

Engine Condition

M67-25 (STP1) - Body ground

Input

BE - Body ground

Stop light switch signal

Brake pedal depressed → Brake pedal released

9 V or higher → 1 V or less

Stop Light

F1-4 (+B) - F1-18 (E)

Input

L - W-B

Power source

Always

11 to 14 V

-

F1-22 (P) - F1-18 (E)

Input

L - W-B

P position signal

Shift lever in P → Shift lever not in P

30 kΩ or higher → Below 200 Ω

Shift P Signal

F1-18 (E) - Body ground

-

W-B - Body ground

GND

Always

Below 1 Ω

-

F1-21 (SSW2) - Body ground

Input

GR - Body ground

SSW2 contact signal

HINT:

Backup for SSW1. Behaves the same way as SSW1.

Engine switch pushed → Engine switch not pushed

Below 15 Ω → 10 kΩ or higher

Start Switch2

F1-23 (SSW1) - Body ground

Input

W - Body ground

SSW1 contact signal

Engine switch pushed → Engine switch not pushed

Below 15 Ω → 10 kΩ or higher

Start Switch1

F1-16 (ACCD) - Body ground

Output

LG - Body ground

ACC signal

20°C (68°F)

285.71 to 428.57 Ω

ACC Relay Monitor

F1-17 (IG1D) - Body ground

Output

GR - Body ground

IG signal

20°C (68°F)

60.78 to 89.11 Ω

IG Relay Monitor (Outside)

F1-19 (SPD) - Body ground

Input

V - Body ground

Vehicle speed signal

Always

30 kΩ or higher

Vehicle Speed Signal

(c) Reconnect the M66, M67 and F1 certification ECU (smart key ECU assembly) connectors.

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

Tester Connection

Input/Output

Wiring Color

Terminal Description

Condition

Specified Condition

Related Data List Item

M66-20 (STA) - F1-18 (E)

Input

LG - W-B

When starting the engine, this monitors the voltage sent from terminal STAR to the starter relay to judge whether the engine is "being started".

Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)

6 V or higher*1 → 1.0 V or less

-

M66-9 (STAR) - F1-18 (E)

Input/Output

W - W-B

Outputs voltage to the starter relay

  • Outputs voltage (12 V) to the starter relay when starting the engine. (Max. 30 sec. Turns off when an engine speed of 1000 rpm.)

HINT:

When Hi is selected, a start request signal (STAR) will not be output even though a start request signal (STSW) is input.

Engine switch pressed and held with brake pedal depressed (starter on) → Approximately 1 second after engine switch released (starter off)

6 V or higher*1 → 1.0 V or less

-

Receives neutral start switch (P, N position detection) signal

  • Monitors whether the neutral start switch is on (P or N) or off (other than P or N). Applies voltage via a resistor (large) in the certification ECU (smart key ECU assembly). When the neutral start switch is on, due to the starter relay coil resistance (small) using some of the voltage, the voltage at terminal STAR will be low (2.7 V or less), and when the neutral start switch is off, the voltage will be high (9 V or more).

Perform the following operations except while the engine is cranking:

  • Shift lever in any position other than P or N → Shift lever in P or N (at 20°C (68°F))

9 V or higher → 2.7 V or less

Neutral SW/ Clutch SW

M66-16 (NE) - F1-18 (E)

Input

GR - W-B

Engine speed signal

Idling (engine warmed up)

Pulse generation

(See waveform 1)

Engine Condition

M67-25 (STP1) - F1-18 (E)

Input

BE - W-B

Stop light switch signal

Brake pedal released → Brake pedal depressed

1 V or less → 9 V or higher

Stop Light Switch1

F1-14 (SLP) - F1-18 (E)

Input

G - W-B

Steering lock position signal

Steering locked → Steering unlocked

11 to 14 V → 1.5 V or less

Steering Unlock Switch

F1-25 (SLR+) - F1-18 (E)

Output

P - W-B

Steering lock motor operation command signal

(Steering lock motor operation permission signal sent from the certification ECU (smart key ECU assembly))

When a door is opened, the steering lock motor will be operated if all of the following conditions are met:

  • The steering is unlocked.
  • The engine switch is off.
  • The shift lever is in P.

Pulse generation

(See waveform 2)

-

F1-22 (P) - F1-18 (E)

Input

L - W-B

P position signal

Shift lever in P → Shift lever not in P

9 V or higher → 2.76 V or less

Shift P Signal

F1-21 (SSW2) - F1-18 (E)

Input

GR - W-B

SSW2 contact signal

HINT:

Backup for SSW1. Behaves the same way as SSW1.

Engine switch not pushed → Engine switch pushed

9 V or higher → 1 V or less

Start Switch2

F1-23 (SSW1) - F1-18 (E)

Input

W - W-B

SSW1 contact signal

Engine switch not pushed → Engine switch pushed

9 V or higher → 1 V or less

Start Switch1

F1-16 (ACCD) - F1-18 (E)

Output

LG - W-B

ACC signal

Engine switch off → Engine switch on (ACC)

1 V or less → 8.5 V or higher

ACC Relay Monitor

F1-17 (IG1D) - F1-18 (E)

Output

GR - W-B

IG signal

Engine switch on (ACC) → Engine switch on (IG)

1 V or less → 9 V or higher

IG Relay Monitor (Outside)

F1-19 (SPD) - F1-18 (E)

Input

V - W-B

Vehicle speed signal

Vehicle being driven at approx. 5 km/h (3 mph)

Pulse generation

(See waveform 3)

Vehicle Speed Signal

F1-8 (CLG5) - F1-18 (E)

Output

SB - W-B

Output to No. 1 indoor electrical key antenna assembly (front floor)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 4)

Overhead + Front Room (key diagnostic mode)

F1-9 (CG5B) - F1-18 (E)

Output

R - W-B

Output to No. 1 indoor electrical key antenna assembly (front floor) (terminal on opposite side of component from CLG5 output terminal)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 4)

Overhead + Front Room (key diagnostic mode)

M67-11 (CLG7) - F1-18 (E)

Output

B - W-B

Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 4)

Overhead + Back Door (inside) (key diagnostic mode)

M67-10 (CG7B) - F1-18 (E)

Output

W - W-B

Output to No. 3 indoor electrical key antenna assembly (inside luggage compartment) (terminal on opposite side of component from CLG7 output terminal)

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

Pulse generation

(See waveform 4)

Overhead + Back Door (inside) (key diagnostic mode)

HINT:

  • *1: While the engine is cranking, the battery voltage may drop to approximately 6 V.
  • The waveform of the steering lock actuator motor stopped can be checked without performing any particular operation.
  • The waveform of the steering lock actuator motor operating can be checked if either of the following operations is performed:
    • To unlock the steering, bring the electrical key transmitter sub-assembly into the cabin and turn the engine switch on (ACC) or on (IG).
    • To lock the steering, open a door with the engine switch off and the shift lever in P.

(e) Using an oscilloscope, check the waveform of the ECU.

NOTICE:

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

(1) Waveform 1

Item

Content

Tester Connection

M66-16 (NE) - F1-18 (E)

Tool Setting

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

Condition

Idling (engine warmed up)

HINT:

The wavelength becomes shorter as the engine speed increases.

(2) Waveform 2

*a

Steering lock motor not operating

*b

Steering lock motor operating

Item

Content

Tester Connection

F1-25 (SLR+) - F1-18 (E)

Tool Setting

2 V/DIV., 200 ms./DIV.

Condition

Steering lock motor stopped → Steering lock motor operating → Steering lock motor stopped

(3) Waveform 3

Item

Content

Tester Connection

F1-19 (SPD) - F1-18 (E)

Tool Setting

5 V/DIV., 20 ms./DIV.

Condition

Vehicle being driven at approx. 5 km/h (3 mph)

HINT:

The wavelength becomes shorter as the vehicle speed increases.

(4) Waveform 4

*a

For 30 seconds after any door closed

*b

After 30 seconds or more have elapsed since any door closed

Item

Content

Tester Connection

F1-8 (CLG5) - F1-18 (E)

F1-9 (CG5B) - F1-18 (E)

M67-11 (CLG7) - F1-18 (E)

M67-10 (CG7B) - F1-18 (E)

Tool Setting

2 V/DIV., 500 ms/DIV.

Condition

Procedure:

  1. Engine switch off
  2. Electrical key transmitter sub-assembly not inside vehicle
  3. Within 30 seconds of closing any door

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

Click here

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

Click here

CHECK ECM

Click here

CHECK ENGINE SWITCH

Click here

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