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Test No. 1: Ecu Power Source Circuit: Testing

  1. Check DOOR fuse, located in junction block, under left side of instrument panel. If fuse is okay, go to next step. If fuse is open, locate and repair short circuit. See WIRING DIAGRAMS . Replace fuse.
  2. Turn ignition off. Disconnect body ECU connectors. Measure voltage between body ECU harness 25-pin connector terminal No. 14 and ground. If voltage is 9-14 volts, go to next test listed. See appropriate TROUBLE SHOOTING SYMPTOMS table under TROUBLE SHOOTING. If voltage is not 9-14 volts, go to next step.
  3. Check for faulty wiring and connectors between body ECU and ground. See WIRING DIAGRAMS . Repair ground circuit as necessary. If ground circuit is okay, repair wiring or connectors between battery and body ECU.
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