B1243

DESCRIPTION

If the collision door lock release function does not operate normally, or an open or short in the GWS input circuit of the main body ECU RH (cowl side J/B RH) is detected, DTC B1243 will be output.

HINT:

If DTC B1243 is output, the speed-sensitive automatic door lock function, shift-linked automatic door unlock function, and collision door lock release function will be prohibited.

DTC No.	DTC Detection Condition	Trouble Area
B1243	A malfunction occurs in the GWS input circuit of the main body ECU RH (cowl side J/B RH).	Main body ECU RH (Cowl side J/B RH) Center airbag sensor Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK HARNESS AND CONNECTOR (CENTER AIRBAG SENSOR - MAIN BODY ECU RH)

1. Connect the negative (-) terminal cable to the battery, and wait for at least 90 seconds.

2. Disconnect the center airbag sensor J47 and J/B RA connectors.

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

   Standard resistance:

   Tester Connection (Symbols)	Condition	Specified Condition
   J47-18 (GSW) - RA-7 (GSW)	Always	Below 1 Ω
   RA-7 (GSW) - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2. INSPECT COWL SIDE JUNCTION BLOCK RH (MAIN BODY ECU RH)

1. Reconnect the J/B RA connector.

2. Turn the engine switch on (IG).

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

   Standard voltage:

   Tester Connection (Symbols)	Condition	Specified Condition
   RA-7 (GSW) - Body ground	Engine switch on (IG)	4.5 to 5.5 V

NG	REPLACE COWL SIDE JUNCTION BLOCK RH

OK
REPLACE CENTER AIRBAG SENSOR