Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Terminals Of Ecu

Toyota Corolla Cross (2022-2024) Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System (w/ Afs) / Terminals Of Ecu

TERMINALS OF ECU

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND POWER DISTRIBUTION BOX ASSEMBLY

(a) Remove the main body ECU (multiplex network body ECU) from the power distribution box assembly.

Click here

(b) Connect the power distribution box assembly connectors.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

MB-13 (GND1) - Body ground

Ground

Always

Below 1 Ω

MB-14 (GND2) - Body ground

Ground

Always

Below 1 Ω

MB-26 (BECU) - Body ground

Auxiliary battery power supply

Ignition switch off

11 to 14 V

MB-27 (IGR) - Body ground

Ignition power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

(d) Install the main body ECU (multiplex network body ECU).

Click here

(e) Connect the power distribution box assembly and main body ECU (multiplex network body ECU) connectors.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

8E-5 - Body ground

CXPI communication line

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

I85-26 (HEAD) - Body ground

Light control switch in HEAD position signal input

Light control switch not in HEAD position

11 to 14 V

Light control switch in HEAD position

Below 1 V

8K-1 - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

8E-10 - Body ground

Headlight assembly LH power supply

Ignition switch off

11 to 14 V

Ignition switch ON

Below 1 V

8E-6 - Body ground

Headlight assembly RH power supply

Ignition switch off

11 to 14 V

Ignition switch ON

Below 1 V

I85-8 (CLTB) - I85-21(CLTE)

Automatic light control sensor power supply output

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

I85-14 (AHBI) - Body ground

Auto high beam switch signal input

Auto high beam switch on

Below 1 V

Auto high beam switch off

11 to 14 V

I85-15 (AHID) - Body ground

Auto high beam switch indicator drive output

Ignition switch ON, auto high beam switch off

11 to 14 V

Ignition switch ON, auto high beam switch on

Below 1 V

I85-20 (CLTS) - Body ground

Automatic light control sensor signal input

Ignition switch ON

Pulse generation (See waveform 1)

8C-9 - Body ground

Front door courtesy light switch assembly RH input

Front door RH open

4.7 to 5.3 V

Front door RH closed

Below 1 V

(1) Waveform 1

Item

Content

Tester Connection

I85-20 (CLTS) - Body ground

Tool setting

2 V/DIV., 10 ms./DIV.

Condition

Ignition switch ON

HINT:

The communication waveform changes according to the surrounding brightness.

CHECK HEADLIGHT ECU SUB-ASSEMBLY LH

(a) Disconnect the A159 headlight ECU sub-assembly LH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A159-6 (IGR) - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

A159-12 (GND) - Body ground

Ground

Always

Below 1 Ω

A159-13 (ECUB) - Body ground

Auxiliary battery power supply
  • 15 seconds or more after ignition switch turned off
  • Taillights off

Below 1 V
  • Ignition switch ON or within 15 seconds after ignition switch turned off
  • Taillights on

9.5 to 14 V

(c) Connect the A159 headlight ECU sub-assembly LH connector.

HINT:

  • Since the A159 headlight ECU sub-assembly LH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
  • Since the B and C headlight ECU sub-assembly LH connectors are connected inside the headlight unit assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A159-3 (HEDL) - Body ground

Low beam headlights drive output

Light control switch not in head position

11 to 14 V

Light control switch in head position

Below 1 V

A159-16 (SBR) - A159-15 (SGR)

Rear height control sensor sub-assembly LH power supply

Ignition switch off

Below 1 V

Ignition switch ON

4.75 to 5.25 V

A159-17 (SHRL) - A159-15 (SGR)

Rear height control sensor sub-assembly LH signal input

Ignition switch ON, vehicle unloaded, vehicle stopped

Approximately 2.5 V (value decreases as the front of the vehicle is raised)

A159-20 (LINL) - Body ground

LIN communication line (to headlight ECU sub-assembly RH)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A159-21 (LCL) - Body ground

CAN communication line (Local)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A159-22 (LCH) - Body ground

CAN communication line (Local)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A159-23 (CANL) - Body ground

CAN communication line (Global)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A159-24 (CANH) - Body ground

CAN communication line (Global)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

B-2 (LED1+) - B-12 (LED1-)

Low beam headlights drive output

Low beam headlights off

Below 1 V

Low beam headlights on

10.7 to 15.3 V

B-9 (ACTB) - B-18 (ACTG)

Headlight leveling motor power source

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

B-15 (LED3+) - B-16 (LED3-)

Clearance lights drive output

Clearance lights off

Below 1 V

Clearance lights on

7.6 to 11.0 V

Daytime running lights drive output

Daytime running lights off

Below 1 V

Daytime running lights on

15.2 to 22.0 V

C-1 (PSWH2+) - C-2 (PSWH2-)

Light control LED ECU power source
  • 15 seconds or more after ignition switch turned off
  • Taillights off

Below 1 V
  • Ignition switch ON or within 15 seconds after ignition switch turned off
  • Taillights on

9.5 to 14 V

C-12 (LIN1_1) - Body ground

LIN communication line (to Headlight leveling motor)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

C-13 (LIN1_2) - Body ground

LIN communication line (to Light control LED ECU)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

CHECK HEADLIGHT ECU SUB-ASSEMBLY RH

(a) Disconnect the A160 headlight ECU sub-assembly RH connector.

(b) Measure the voltage and resistance on the wire harness side connector according to the value(s) in the table below.

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A160-6 (IGR) - Body ground

IG power supply

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

A160-12 (GND) - Body ground

Ground

Always

Below 1 Ω

A160-13 (ECUB) - Body ground

Auxiliary battery power supply
  • 15 seconds or more after ignition switch turned off
  • Taillights off

Below 1 V
  • Ignition switch ON or within 15 seconds after ignition switch turned off
  • Taillights on

9.5 to 14 V

(c) Connect the A160 headlight ECU sub-assembly RH connector.

HINT:

  • Since the A160 headlight ECU sub-assembly RH connector is a waterproof type connector, the voltage and pulses cannot be checked directly. The values listed are for reference only.
  • Since the B and C headlight ECU sub-assembly RH connectors are connected inside the headlight unit assembly, the voltage and pulses cannot be checked directly. The values listed are for reference only.

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

Terminal No. (Symbol)

Terminal Description

Condition

Specified Condition

A160-20 (LINL) - Body ground

LIN communication line (to headlight ECU sub-assembly LH)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A160-23 (CANL) - Body ground

CAN communication line (Global)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

A160-24 (CANH) - Body ground

CAN communication line (Global)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

B-2 (LED1+) - B-12 (LED1-)

Low beam headlights drive output

Low beam headlights off

Below 1 V

Low beam headlights on

10.7 to 15.3 V

B-9 (ACTB) - B-18 (ACTG)

Headlight leveling motor power source

Ignition switch off

Below 1 V

Ignition switch ON

11 to 14 V

B-15 (LED3+) - B-16 (LED3-)

Clearance lights drive output

Clearance lights off

Below 1 V

Clearance lights on

7.6 to 11.0 V

Daytime running lights drive output

Daytime running lights off

Below 1 V

Daytime running lights on

15.2 to 22.0 V

C-1 (PSWH2+) - C-2 (PSWH2-)

Light control LED ECU power source
  • 15 seconds or more after ignition switch turned off
  • Taillights off

Below 1 V
  • Ignition switch ON or within 15 seconds after ignition switch turned off
  • Taillights on

9.5 to 14 V

C-12 (LIN1_1) - Body ground

LIN communication line (to Headlight leveling motor)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

C-13 (LIN1_2) - Body ground

LIN communication line (to Light control LED ECU)

Ignition switch off

Below 1 V

Ignition switch ON

Pulse generation

CHECK COMBINATION METER ASSEMBLY

Click here

CHECK FORWARD RECOGNITION CAMERA

Click here

CHECK STEERING SENSOR

for HEV Model: Click here

for Gasoline Model: Click here

SEMICONDUCTOR POWER INTEGRATION ECU

Click here

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