Trouble Code No. 04
- Check all connections and repair as necessary. Check air intake temperature sensor resistance. See AIR INTAKE TEMPERATURE SENSOR under COMPONENT TESTING in this article.
- If resistance is okay, check for continuity between airflow meter terminal "THAa" and ECU terminal "2J". Determine terminal identification. See Figure and Figure .
- If no continuity exists, check for open wiring circuit. If continuity exists, check for shorted circuit or defective ECU.