Toyota 4Runner: Rear Door LH ECU Communication Stop (B2324)

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / Rear Door LH ECU Communication Stop (B2324)

DESCRIPTION

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

DTC Code	DTC Detection Condition	Trouble Area
B2324	No communication between the rear power window regulator motor assembly LH and main body ECU (multiplex network body ECU) for 10 seconds or more.	Rear power window regulator motor assembly LH Main body ECU (multiplex network body ECU) Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

When using the Techstream with the ignition switch off to troubleshoot:
Connect the Techstream to the vehicle and turn a courtesy light switch on and off at 1.5 second intervals until communication between the Techstream and vehicle begins.
Inspect the fuses and bulbs for circuits related to this system before performing the following inspection procedure.

HINT:

When communication between the rear power window regulator motor assembly LH and main body ECU (multiplex network body ECU) stops, DTC B2325 is also stored.

PROCEDURE

CLEAR DTC

(a) Clear the DTCs (See page ).

2.	CHECK FOR DTC

(a) Check for DTCs (See page ).

OK:

DTC B2324 is not output.

USE SIMULATION METHOD TO CHECK

3.	CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - REAR POWER WINDOW REGULATOR MOTOR LH)

(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly (See page ).

(b) Disconnect the K2 rear power window regulator motor assembly LH connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
A-16 (LIN2) - K2-9 (LIN)	Always	Below 1 Ω
A-16 (LIN2) or K2-9 (LIN) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.	CHECK HARNESS AND CONNECTOR (REAR POWER WINDOW REGULATOR MOTOR LH - BATTERY AND BODY GROUND)

(a) Disconnect the K2 rear power window regulator motor assembly LH connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
K2-1 (GND) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
K2-2 (B) - Body ground	Always	11 to 14 V

Text in Illustration

*a	Front view of wire harness connector (to Rear Power Window Regulator Motor Assembly LH)

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.	REPLACE REAR POWER WINDOW REGULATOR MOTOR ASSEMBLY LH

(a) Temporarily replace the rear power window regulator motor assembly LH with a new or normally functioning one (See page ).

CLEAR DTC

(a) Clear the DTCs (See page ).

7.	CHECK FOR DTC

(a) Check for DTCs (See page ).

OK:

DTC B2324 is not output.

END (REAR POWER WINDOW REGULATOR MOTOR LH IS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

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