Toyota CH-R Service Manual: Driver Side Door ECU Communication Stop (B2321)

Toyota CH-R Service Manual / Networking / Lin Communication System / Driver Side Door ECU Communication Stop (B2321)

DESCRIPTION

This DTC is stored when LIN communication between the power window regulator motor assembly (for driver door) and main body ECU (multiplex network body ECU) stops for 10 seconds or more.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

B2321

Driver Side Door ECU Communication Stop

No communication between power window regulator motor assembly (for driver door) and main body ECU (multiplex network body ECU) for 10 seconds or more.

  • Power window regulator motor assembly (for driver door)
  • Main body ECU (multiplex network body ECU)
  • Multiplex network master switch assembly
  • Wire harness or connector
  • POWER fuse

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • When a power window regulator motor assembly is replaced or removed and reinstalled, it requires initialization.

    Click here

  • If the main body ECU (multiplex network body ECU) is replaced, refer to Registration.*1

    Click here

    • *1: w/ Smart Key System

PROCEDURE

1.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

Body Electrical > Main Body > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

Result

Proceed to

Only DTC B2321 is output

A

DTC B1206 and B2321 are output simultaneously

B

HINT:

When DTC B1206 and B2321 are output simultaneously, perform troubleshooting for DTC B1206 first.

B

GO TO DTC B1206

A

2.

INSPECT MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Remove the multiplex network master switch assembly.

Click here

*a

Component without harness connected

(Multiplex Network Master Switch Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

16 (LIN2) - 17 (LIN1)

Always

Below 1 Ω

NG

REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

OK

3.

CHECK HARNESS AND CONNECTOR (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door))

(a) Disconnect the J2 power window regulator motor assembly (for driver door) connector.

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

NOTICE:

Make sure that each ECU is in sleep mode before performing the inspection. To enter sleep mode, turn the ignition switch from ON to off and wait for 180 seconds or more without operating any switches.

Standard Resistance:

Tester Connection

Switch Condition

Specified Condition

J6-16 (LIN2) - J2-9 (LIN)

Ignition switch off

Below 1 Ω

J6-16 (LIN2) or J2-9 (LIN) - Body ground

Ignition switch off

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) - BATTERY, BODY GROUND)

(a) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

J2-2 (B) - J2-1 (GND)

Always

11 to 14 V

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

J2-1 (GND) - Body ground

Always

Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door)

(a) Replace the power window regulator motor assembly (for driver door).

Click here

NEXT

6.

CHECK DTC OUTPUT

(a) Clear the DTCs.

Click here

Body Electrical > Main Body > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B2321 is not output.

OK

END (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Driver Door) WAS DEFECTIVE)

NG

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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