Engine Controls - Basic Testing: Diagnosis Toyota Paseo L50

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.

SPARK TEST

1. Disconnect spark plug wires. Remove spark plugs. Install spark plug on each spark plug wire. Ground spark plug against cylinder block. CAUTION: To prevent gasoline from being injected, DO NOT crank engine for longer than 5 seconds.
2. Crank engine and check for spark. If spark does not exist, check ignition coils and ignitor electrical connections. If electrical connections are okay, go to next step. If electrical connections are defective, repair as necessary and recheck for spark. NOTE: The DIS uses 2 ignition coils mounted on top of spark plugs and fires 2 cylinders simultaneously using the same ignition coil.
3. Using ohmmeter, check resistance of spark plug wire. Replace spark plug wire if resistance exceeds 25,000 ohms per wire. If resistance is within specification, go to next step.
4. Turn ignition on. Check for battery voltage at ignitor and ignition coil positive terminal. If battery voltage exists, go to next step. If battery voltage does not exist, check wiring between ignition switch, ignition coil and ignitor. See appropriate wiring diagram in «WIRING DIAGRAMS»(ref-22375) article.
5. Check ignition coil resistance. See «IGNITION COIL RESISTANCE (DISTRIBUTORLESS IGNITION SYSTEM)»(ref-22371-S40124354912001010300000) under IGNITION CHECKS (DISTRIBUTORLESS IGNITION SYSTEM). Replace ignition coil if resistance is not within specification. If ignition coil resistance is within specification, go to next step.
6. Check resistance of camshaft position sensor and crankshaft position sensor. See «CAMSHAFT POSITION SENSOR»(ref-22371-S20692333332001010300000) and «CRANKSHAFT POSITION SENSOR»(ref-22371-S28977067332001010300000) under IGNITION CHECKS (DISTRIBUTORLESS IGNITION SYSTEM).
7. Replace camshaft position sensor or crankshaft position sensor if resistance is not within specification. If camshaft position sensor and crankshaft position sensor resistances are within specification, go to next step.
8. Check ignition IGT signal from Engine Control Module (ECM). If ignition IGT signal from ECM is defective, a diagnostic trouble code P1300 will be set in the ECM memory to indicate a ignitor circuit malfunction. See «TESTS W/CODES»(ref-22376) article for diagnostic trouble code.
9. If IGT signal is okay, substitute another ignitor and recheck system operation. If IGT signal is defective, check wiring between Engine Control Module (ECM) and ignitor. See «ECM LOCATION TABLE (DISTRIBUTORLESS IGNITION SYSTEM)»(ref-22371-S30328337592001010300000) . If wiring is defective, repair wiring as necessary and recheck system operation. If wiring is okay, substitute another ECM and recheck system operation. Reinstall components.

ECM LOCATION