Start Signal System Test
- Locate ECM harness connector. ECM is located under passenger's seat. Turn ignition switch to START position. Measure voltage between ground and ECM harness connector terminal No. 34 (Black/Yellow wire). See Figure . Battery voltage should be present in START position ONLY. Zero volts should be present in any other ignition switch position.
- If voltage is not as specified, repair open Black/Yellow wire between ECM and ignition switch. If voltage is as specified, check ECM terminals, harness, and connector terminals for damage or corrosion. Repair as necessary.
- Turn ignition on. Perform Mode IV (switch check). See the TESTS W/CODES - 2.4L article. Ensure Red LED is on while ignition switch in START position. If Red LED is on, system is functioning properly. If Red LED is not on, repeat step 1).