Toyota CH-R Service Manual: Rear Door LH ECU Communication Stop (B2324)

Toyota CH-R Service Manual / Networking / Lin Communication System / Rear Door LH ECU Communication Stop (B2324)

DESCRIPTION

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

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B2324	Rear Door LH ECU Communication Stop	No communication between power window regulator motor assembly (for rear LH door) and main body ECU (multiplex network body ECU) for 10 seconds or more.	Power window regulator motor assembly (for rear LH door) Main body ECU (multiplex network body ECU) Instrument panel junction block assembly Wire harness or connector DOOR R/L 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 is necessary to perform 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.	INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Remove the instrument panel junction block assembly.

Click here

Component without harness connected

(Instrument Panel Junction Block Assembly)

(b) Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.

HINT:

This inspection is to check the LIN communication line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

Standard Resistance:

Tester Connection	Condition	Specified Condition
3H-25 - MB-16 (LIN2)	Always	Below 1 Ω

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

2.	CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY - POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door))

(a) Disconnect the L2 power window regulator motor assembly (for rear LH 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
3H-25 - L2-9 (LIN)	Ignition switch off	Below 1 Ω
L2-9 (LIN) or 3H-25 - Body ground	Ignition switch off	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK HARNESS AND CONNECTOR (POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door) - BATTERY, BODY GROUND)

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

Standard Voltage:

Tester Connection	Condition	Specified Condition
L2-2 (B) - L2-1 (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
L2-1 (GND) - Body ground	Always	Below 1 Ω

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear LH Door)

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

Click here

5.	CHECK FOR DTC

(a) Clear the DTCs.

Click here

Body Electrical > Main Body > Clear DTCs

(b) Recheck for DTCs.

Body Electrical > Main Body > Trouble Codes

OK:

DTC B2324 is not output.

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

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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