Toyota Corolla Cross: RR-Door P/W Motor Component Internal Failure (B231F96)

DESCRIPTION

The main body ECU (multiplex network body ECU) communicates with the power window regulator motor assembly (for rear RH door) via LIN communication.

This DTC is stored when a power window regulator motor assembly (for rear RH door) is malfunctioning, or the ECU built into the power window regulator motor assembly (for rear RH door) determines that the fully closed power window position has deviated approximately 20 mm (0.787 in.) or more from the normal position.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
B231F96	RR-Door P/W Motor Component Internal Failure	Either condition is met: Power window regulator motor assembly (for rear RH door) is malfunctioning ECU in power window regulator motor assembly (for rear RH door) determines that fully closed power window position has deviated approx. 20 mm (0.787 in.) or more from normal position	Incorrect installation of power window components Overheated power window regulator motor assembly (for rear RH door) Power window regulator motor assembly (for rear RH door) Harness or connector

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

• Inspect the fuses for circuits related to this system before performing the following procedure.
• If a power window regulator motor assembly (for rear RH door) has been replaced with a new one, initialize the power window control system.

  Click here

• If a power window regulator motor assembly (for rear RH door) and door window regulator sub-assembly have been removed and installed, or if a power window regulator motor assembly (for rear RH door) was reused when a door glass or door glass run was replaced, initialize the power window control system.

  Click here

• The power window control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power window control system after confirming that the communication system is functioning properly.

  Click here

PROCEDURE

1.

CLEAR DTC

(a) Clear the DTCs.

Body Electrical > Main Body > Clear DTCs

NEXT

2.	CHECK FOR DTC

(a) Check for DTCs.

Body Electrical > Main Body > Trouble Codes

Result	Proceed to
DTCs are not output	A
B231F96 is output	B

A

USE SIMULATION METHOD TO CHECK

B

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

(a) Disconnect the power window regulator motor assembly (for rear RH door) connector.

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

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
I3-2 (B) - Body ground	Ignition switch off	11 to 14 V

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I3-1 (GND) - Body ground	Always	Below 1 Ω

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.	PERFORM ACTIVE TEST USING GTS

(a) Perform the Active Test according to the display on the GTS.

Body Electrical > Main Body > Active Test

Tester Display	Measurement Item	Control Range	Diagnostic Note
RR Door Power Window UP	Rear RH door power window up activate	OFF/ON	-
RR Door Power Window DOWN	Rear RH door power window down activate	OFF/ON	-

Body Electrical > Main Body > Active Test

Tester Display
RR Door Power Window UP

Body Electrical > Main Body > Active Test

Tester Display
RR Door Power Window DOWN

HINT:

Up and down movement does not occur if the arrow is not pressed and held.

OK:

Rear RH Door power window operates normally.

NG

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)

OK

5.	PERFORM INITIALIZATION

(a) Initialize the power window regulator motor assembly (for rear RH door).

Click here

NEXT

6.	CHECK POWER WINDOW CONTROL SYSTEM

(a) Check that the rear RH door power window operates normally by opening and closing it.

Click here

OK:

Rear RH door power window operates normally.

NG

REPLACE POWER WINDOW REGULATOR MOTOR ASSEMBLY (for Rear RH Door)

OK

7.	CHECK WHETHER PARTS HAVE BEEN INSTALLED CORRECTLY

(a) Check that the rear RH door power window components are installed correctly.

OK:

Rear RH door power window components are installed correctly.

OK

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

NG

INSTALL PARTS CORRECTLY

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