Inspection Procedure
For circuit wiring diagram, see Fig 1.
- Check the continuity of the ECU-B2, RADIO No. 2, P FR DOOR and ECU-IG fuses. See COMPONENT LOCATIONS table. If there is continuity, go to the next step. If there is not continuity, replace the failed fuse.
- Check the voltage between terminals BECU, BSUB, IG and ACC and GND of the body ECU No. 1 connector. Turn the ignition switch OFF. Disconnect the body ECU No. 1 connector. Measure the voltage between terminals IG, ACC and GND. If voltage is between 10-14 volts, perform the next test procedure of the problem symptom. See BODY ECU NO. 1 PROBLEM SYMPTOM INDEX table. If the voltage is not as specified, go to the next step.
- Check for short to power, short to ground and continuity in the wiring harness and connector between body ECU No. 1 and body ground. If the results are OK, check and repair the wiring harness and connector between the body ECU No. 1 and battery. If the results are not OK, repair or replace the wiring harness or connector.