Toyota Yaris: Can Communication System / Lost Communication With Brake System Control Module(ch2) Missing Message (U117087)

Toyota Yaris XP210 (2020-2022) Reapir and Service Manual / Power Source & Network / Networking / Can Communication System / Lost Communication With Brake System Control Module(ch2) Missing Message (U117087)

DESCRIPTION

The brake actuator assembly communicates with the ECM and engine stop and start ECU. When the brake actuator assembly does not receive data from the engine stop and start ECU, the engine stop and start ECU stores DTC U117087.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

U117087

Lost Communication With Brake System Control Module(ch2) Missing Message

No communication from the brake actuator assembly continues.

  • CAN main/branch bus lines or connector
  • Engine stop and start ECU
  • Brake actuator assembly
  • Central gateway ECU (network gateway ECU)
  • No. 6 global CAN junction connector

Stop and Start

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.

    Click here

  • When disconnecting and reconnecting the auxiliary battery, there is an automatic learning function that completes learning when the respective system is used.

    Click here

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more.

    Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR CAN BUS BRANCH WIRE

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) auxiliary battery terminal.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Engine Stop and Start ECU

Standard Resistance:

Tester Connection

Condition

Specified Condition

Result

H117-10 (CANH) - H117-21 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

Below 54 Ω: Short circuit between bus lines

70 Ω or more: Open circuit in main bus lines

H117-10 (CANH) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

Below 200 Ω: CANH short to ground

H117-21 (CANL) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

Below 200 Ω: CANL short to ground

H117-10 (CANH) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Below 6 kΩ: CANH +B short

H117-21 (CANL) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

Below 6 kΩ: CANL +B short

Result

Proceed to

OK

A

NG (Open circuit in CAN main bus lines)

B

NG (Short circuit between bus lines)

C

NG (+B short or Short to ground)

D

B

GO TO STEP 4

C

GO TO STEP 10

D

GO TO STEP 16

A

2.

CLEAR DTC

(a) Clear the DTCs.

Powertrain > Stop and Start > Clear DTCs
NEXT

3.

CHECK FOR DTC

(a) Check for DTCs.

Powertrain > Stop and Start > Trouble Codes

Result

Proceed to

DTC U117087 is output

A

DTC U117087 is not output

B

A

REPLACE ENGINE STOP AND START ECU

B

USE SIMULATION METHOD TO CHECK

4.

CHECK FOR OPEN IN CAN BUS WIRE (BRAKE ACTUATOR ASSEMBLY MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Brake Actuator Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-9 (CANH) - H117-20 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 7

OK

5.

CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-11 (CANH) - H117-22 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 8

OK

6.

CHECK FOR OPEN IN CAN BUS WIRE (ENGINE STOP AND START ECU BRANCH BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Engine Stop and Start ECU

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-10 (CANH) - H117-21 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

OK

REPLACE NO. 6 GLOBAL CAN JUNCTION CONNECTOR

NG

GO TO STEP 9

7.

CHECK FOR OPEN IN CAN BUS MAIN WIRE (BRAKE ACTUATOR ASSEMBLY)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the brake actuator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A108-36 (CA2H) - A108-37 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Brake Actuator Assembly)

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (BRAKE ACTUATOR ASSEMBLY - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

8.

CHECK FOR OPEN IN CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H40-12 (CAWH) - H40-13 (CAWL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

9.

CHECK FOR OPEN IN CAN BUS BRANCH WIRE (ENGINE STOP AND START ECU)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the engine stop and start ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H43-15 (LC1H) - H43-16 (LC1L)

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Engine Stop and Start ECU)

OK

REPLACE ENGINE STOP AND START ECU

NG

REPAIR OR REPLACE CAN BUS BRANCH WIRE (ENGINE STOP AND START ECU - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

10.

CHECK FOR SHORT IN CAN BUS WIRES (BRAKE ACTUATOR ASSEMBLY MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Brake Actuator Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-9 (CANH) - H117-20 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 13

OK

11.

CHECK FOR SHORT IN CAN BUS WIRES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-11 (CANH) - H117-22 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

NG

GO TO STEP 14

OK

12.

CHECK FOR SHORT IN CAN BUS WIRES (ENGINE STOP AND START ECU BRANCH BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Engine Stop and Start ECU

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-10 (CANH) - H117-21 (CANL)

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

OK

REPLACE NO. 6 GLOBAL CAN JUNCTION CONNECTOR

NG

GO TO STEP 15

13.

CHECK FOR SHORT IN CAN BUS WIRES (BRAKE ACTUATOR ASSEMBLY)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the brake actuator assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A108-36 (CA2H) - A108-37 (CA2L)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Brake Actuator Assembly)

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (BRAKE ACTUATOR ASSEMBLY - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

14.

CHECK FOR OPEN IN CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H40-12 (CAWH) - H40-13 (CAWL)

Cable disconnected from negative (-) auxiliary battery terminal

108 to 132 Ω

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

15.

CHECK FOR SHORT IN CAN BUS WIRES (ENGINE STOP AND START ECU)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the engine stop and start ECU connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

H43-15 (LC1H) - H43-16 (LC1L)

Cable disconnected from negative (-) auxiliary battery terminal

54 to 69 Ω

*a

Front view of wire harness connector

(to Engine Stop and Start ECU)

OK

REPLACE ENGINE STOP AND START ECU

NG

REPAIR OR REPLACE CAN BUS BRANCH WIRE (ENGINE STOP AND START ECU - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

16.

CHECK FOR SHORT IN CAN BUS WIRES (BRAKE ACTUATOR ASSEMBLY MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Brake Actuator Assembly

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-9 (CANH) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-20 (CANL) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-9 (CANH) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

H117-20 (CANL) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

NG

GO TO STEP 19

OK

17.

CHECK FOR SHORT IN CAN BUS WIRES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) MAIN BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-11 (CANH) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-22 (CANL) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-11 (CANH) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

H117-22 (CANL) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

NG

GO TO STEP 20

OK

18.

CHECK FOR SHORT IN CAN BUS WIRES (ENGINE STOP AND START ECU BRANCH BUS)

(a) Disconnect the No. 6 global CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 6 Global CAN Junction Connector)

*b

to Engine Stop and Start ECU

Standard Resistance:

Tester Connection

Condition

Specified Condition

H117-10 (CANH) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-21 (CANL) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H117-10 (CANH) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

H117-21 (CANL) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

OK

REPLACE NO. 6 GLOBAL CAN JUNCTION CONNECTOR

NG

GO TO STEP 21

19.

CHECK FOR SHORT IN CAN BUS WIRES (BRAKE ACTUATOR ASSEMBLY)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the brake actuator assembly connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Brake Actuator Assembly)

*b

to No. 6 Global CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

A108-36 (CA2H) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A108-37 (CA2L) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

A108-36 (CA2H) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

A108-37 (CA2L) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

OK

REPLACE BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (BRAKE ACTUATOR ASSEMBLY - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

20.

CHECK FOR OPEN IN CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

*b

to No. 6 Global CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

H40-12 (CAWH) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H40-13 (CAWL) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H40-12 (CAWH) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

H40-13 (CAWL) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN BUS MAIN WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

21.

CHECK FOR SHORT IN CAN BUS WIRES (ENGINE STOP AND START ECU)

(a) Reconnect the H117 No. 6 global CAN junction connector.

(b) Disconnect the engine stop and start ECU connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Engine Stop and Start ECU)

*b

to No. 6 Global CAN Junction Connector

Standard Resistance:

Tester Connection

Condition

Specified Condition

H43-15 (LC1H) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H43-16 (LC1L) - H3-4 (CG)

Cable disconnected from negative (-) auxiliary battery terminal

200 Ω or higher

H43-15 (LC1H) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

H43-16 (LC1L) - H3-16 (BAT)

Cable disconnected from negative (-) auxiliary battery terminal

6 kΩ or higher

OK

REPLACE ENGINE STOP AND START ECU

NG

REPAIR OR REPLACE CAN BUS BRANCH WIRE (ENGINE STOP AND START ECU - NO. 6 GLOBAL CAN JUNCTION CONNECTOR)

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    D..

    Categories

    Turning the Engine Off

    Stop the vehicle completely. Manual transaxle: Shift into neutral and set the parking brake.

    Automatic transaxle: Shift the selector lever to the P position and set the parking brake.

    Press the push button start to turn off the engine. The ignition position is off.

    read more

     
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