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 323
Scheme 324
Scheme 325
Scheme 326
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0), and then back to ON (II).
- Operate the power seat with the driving position memory switch.
- Check for DTCs with the HDS. Is DTC B1843 indicated? YES -Go to step 5. NO -Intermittent failure, the system is OK at this time. Check for loose or poor connections.
- Turn the ignition switch to LOCK (0).
- Disconnect the power seat control unit connectors and power mirror control unit connector (24P).
- Check for continuity between power seat control unit connector B (40P) terminal No. 23 and power mirror control unit 24P connector terminal No. 24. Is there continuity? YES -Go to step 8. NO -Repair an open in the UART wire between the power mirror control unit 24P connector and power seat control unit connector B (40P).
- Check for continuity between body ground and power seat control unit connector B (40P) terminal No. 23. Is there continuity? YES -Repair a short to ground in the UART wire. NO -Go to step 9.
- Reconnect the power mirror control unit 24P connector.
- Measure the voltage between body ground and power mirror control unit 24P connector terminal No. 13. Is there battery voltage? YES -Go to step 11. NO -Check No. A15 (10 A) fuse in the under-hood fuse/relay box. If the fuse is OK, repair an open or high resistance in the wire.
- Turn the ignition switch to ON (II).
- Measure the voltage between body ground and power mirror control unit 24P connector terminal No. 15. Is there 0.2 V or more? YES -Replace the power mirror control unit (see «POWER MIRROR CONTROL UNIT INPUT TEST/REPLACEMENT»(ref-512950-S02432368472012110500000) ). NO -Repair an open or high resistance in the wire between the power mirror control unit and G401. If the wire is OK, repair G401.