B1243

DOOR LOCK: POWER DOOR LOCK CONTROL SYSTEM: B1243: GSW Terminal Circuit Malfunction
B1243 - GSW Terminal Circuit Malfunction

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 junction block 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 lock function, and collision door lock release function will be prohibited.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT

(a) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(b) Check for DTC.

OK:

B1243 output does not reoccur.

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

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

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

(a) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(b) Disconnect the center airbag sensor assembly connector.

(c) Disconnect the main body ECU RH (cowl side junction block RH) connector.





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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH ) (GSW VOLTAGE)

(a) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(b) Reconnect the main body ECU RH (cowl side junction block RH) connector.

(c) Connect the cable to the negative (-) battery terminal.

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





Standard Voltage:





NOTICE:
Turning the engine switch on (IG) with the center air bag sensor assembly connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

NG -- REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)
OK -- Continue to next step.

4. REPLACE CENTER AIRBAG SENSOR ASSEMBLY

(a) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(b) Replace the center airbag sensor assembly Removal.

NEXT -- Continue to next step.

5. CHECK DTC OUTPUT

(a) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

OK:

B1243 output does not reoccur.

NG -- REPLACE MAIN BODY ECU RH (COWL SIDE JUNCTION BLOCK RH)

OK -- END (CENTER AIR BAG SENSOR ASSEMBLY IS DEFECTIVE)