VISUAL INSPECTION
Visually inspect all electrical wiring, looking for chafed, stretched, cut or pinched wiring. Ensure electrical connectors fit tightly and are not corroded. Ensure vacuum hoses are properly routed and are not pinched or cut. See VACUUM DIAGRAMS article to verify routing and connections (if necessary). Inspect air induction system for possible vacuum leaks.
MECHANICAL INSPECTION
| WARNING | DO NOT use ignition switch during compression tests on fuel injected vehicles. Use a remote starter to crank engine. Fuel injectors on many models are triggered by ignition switch during cranking mode, which can create a fire hazard or contaminate the engine's oiling system. |
SPARK TEST
Note. ES300 uses a Distributorless Ignition System (DIS). Separate ignition coil for each cylinder is located on valve covers.
| CAUTION | To prevent fuel from being injected during cranking in the following procedure, crank engine for no more than 1-2 seconds at a time. |
- Unplug ignition coil connector. Remove ignition coil. Remove spark plug. Connect spark plug to coil and reconnect ignition coil connector. Ground the spark plug.
- Check plug for spark while cranking engine. If spark is not present, turn ignition off. Check ignition coil, ignitor and distributor connectors. Repair as necessary. If connections are good, check for voltage at positive terminal (Black/Orange wire) of ignition coil connector and ignitor.
- If battery voltage is not present, repair circuit. If battery voltage is present, check resistance between terminals of ignition coil connector (ignition coil primary resistance). If resistance is not as specified, replace ignition coil. See IGNITION COIL RESISTANCE table.
- If resistance is as specified, check resistance between terminals of camshaft position sensor. See «SENSOR RESISTANCE»(ref-21759-S27538503222001010300000) table. If resistance is not as specified, replace camshaft position sensor. If resistance is as specified, check resistance between terminals of crankshaft position sensor. See «SENSOR RESISTANCE»(ref-21759-S27538503222001010300000) table.
- If resistance is not as specified, replace crankshaft position sensor. If resistance is as specified, check for ignitor circuit malfunction. See procedure for Code P1300 in appropriate «TESTS W/CODES - OBD-II»(ref-21746) article. If ignitor circuit is okay, replace ignitor.
| Application | Primary | Secondary |
|---|
| Cold (1) | .54-.84 | (2) |
| Hot (3) | .68-.98 | (2) |
| (1) Coil temperature of 14-122°F (-10-50°C). (2) Information is not available from manufacturer. (3) Coil temperature of 123-212°F (51-100°C). |
| (1) | Coil temperature of 14-122°F (-10-50°C). |
| (2) | Information is not available from manufacturer. |
| (3) | Coil temperature of 123-212°F (51-100°C). |
IGNITION COIL RESISTANCE - Ohms
| Application | Ohms |
|---|
| Camshaft Sensor |
| Cold (1) | 835-1400 |
| Hot (2) | 1060-1645 |
| Crankshaft Sensor |
| Cold (1) | 1630-2740 |
| Hot (2) | 2060-3225 |
| (1) Sensor temperature of 14-122°F (-10-50°C). (2) Sensor temperature of 123-212°F (51-100°C). |
| (1) | Sensor temperature of 14-122°F (-10-50°C). |
| (2) | Sensor temperature of 123-212°F (51-100°C). |
