M1, M2 Set Switch Circuit
NOTE:
If not using the hand-held tester, begin with step 3.
For circuit description, see Fig 1.
- Check M1, M2 SET switch operation. Connect the hand-held tester to the DLC3. See Fig 2. Turn the ignition switch ON and the hand-held tester main switch ON. Select the DATA LIST mode on the hand-held tester. Check that the switch status (ON/OFF) changes on the screen of the hand-held tester as M1 and M2 SET switches of the vehicle are turned. If the switch status changes in the same way as the vehicle switch operation, go to the next step. If the results are not good, go to step 3.
- Check the power seat position memory function. Disconnect the negative (-) terminal of the battery, after 5 minutes reconnect it. Reset the memory of the power seat position ECU. Connect the hand-held tester to the DLC3. Turn the ignition switch ON and the hand-held tester main switch ON. Select the DATA LIST mode on the hand-held tester. When the driving position is recorded in the memory by turning M1 and M2 switches of the vehicle, check that the memory status changes from "NOT MEMORIZED" to "MEMORIZED" on the screen of the hand-held tester. If the switch status changes in the same way as the vehicle switch operation, check the seat position sensor circuit. See SEAT POSITION SENSOR CIRCUIT . If the results are not good, check and replace the power seat position ECU.
- Check the M1, M2 SET switch. See DRIVING POSITION MEMORY & RETURN SWITCH under COMPONENT TESTS in appropriate POWER MIRRORS article in MIRRORS. If the results are OK, check and repair the wiring harness or connector between the driver door ECU and switch. If the results are not good, replace the M1, M2 and SET switches.