Note. If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A (see TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
Scheme 87
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Wait for 6 seconds or more.
- Check for DTCs with the HDS. Is DTC U0199 indicated? YES - Go to step 5 . NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections between the power seat control unit and the door multiplex control unit.
- From the BODY ELECTRICAL system select menu, select UNIT INFORMATION, and then select CONNECTED UNIT. Is the power window master switch (door multiplex control unit) detected? YES - Replace the power seat control unit. • NO - Go to step 6 .
- Turn the ignition switch to LOCK (0).
- Disconnect the power window master switch 37P connector.
- Disconnect power seat control unit connector B (40P).
- Check for continuity between power seat control unit connector B (40P) terminals No. 39 and No. 40 and the door multiplex control unit 37P connector terminals No. 33 and No. 35 individually. Is there continuity? YES - Faulty door multiplex control unit; replace the power window master switch (see «POWER WINDOW MASTER SWITCH REPLACEMENT»(ref-333619-S07541619552009072100000) ). • NO - Repair an open in the B-CAN wire between the door multiplex control unit and the power seat control unit.