Diagnosis & Repair
WARNING: This page is about a different car, the 2000 Toyota Celica. However, it is still accessible from the selected car via links, so may be relevant.
- Access ECM in driver's side of engine compartment, next to battery. Disconnect ECM harness connector E5. See Figure. Use DVOM, backprobe ECM harness connector and measure resistance between ground and terminal No. 27 (White wire) at ECM harness connector E5. Resistance should be one megohm or more. If resistance is as specified, go to step 3. If resistance is not as specified, go to next step.
- Disconnect knock sensor harness connector. Check continuity between knock sensor terminal and knock sensor housing. If continuity does not exist, go to next step. If continuity exists, replace knock sensor.
- Check for open or short in wiring between knock sensor and ECM. See WIRING DIAGRAMS article. If problem exists, repair wiring as necessary. If problem does not exist, substitute knock sensor with known-good knock sensor. Clear and then retrieve DTCs. If DTC P0325 is still displayed, replace ECM. If DTC P0325 is no longer displayed, replace knock sensor.