B1140

DTC Troubleshooting: B1140

DTC B1140:

Driver's Power Window Position Detect Circuit Malfunction

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A Troubleshooting - B-CAN System Diagnosis Test Mode A.

1. Clear the DTCs with the HDS.

2. Turn the ignition switch to LOCK (0) and then back to ON (II).

3. Open and close the driver's power window by using the power window master switch.

4. Check for DTCs with the HDS.

Are DTCs B1125 and B1126 also indicated?

YES -

Troubleshoot the indicated DTC(s) first.�

NO -

Go to step 5.

5. Do resetting the power window control unit Testing and Inspection.

6. Clear the DTCs with the HDS.

7. Turn the ignition switch to LOCK (0) and then back to ON (II).

8. Open and close the driver's power window by using the power window master switch.

9. Check for DTCs with the HDS.

Is DTC B1140 indicated?

YES -

Go to the power window master switch input test and do all power and ground input tests Power Window Master Switch (Door Multiplex Control Unit) Input Test. If the tests prove OK, replace the power window master switch Power Window Master Switch Replacement.�

NO -

The system is OK at this time. Check the connectors and terminals for poor or loose connections.�