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ENGINE DRIVEABILITY AND EMISSIONS 6E–229 7 1. Using a Tech 2, display the engine coolant temperature and note the value. 2. Check the resistance of the engine coolant temperature sensor. Is the actual resistance near the resistance value in — Go to Step 8 Replace the ECT sensor. Verify repair 8 1. Using a Tech 2, display the MAP sensor value in comparison with atmosphere temperature. 2. Check for a faulty, plugged, or incorrectly installed MAP sensor. Was the problem found? — Verify repair Go to Step 9 9 Visually/physically inspect all spark plug high-tension • Verify that the resistance of all spark plug high- tension cables are less than the specified value. • Verify that the all spark plug high-tension cables are correctly fitted to eliminate cross-fitting. • Verify that the all spark plug high-tension cables are not arcing to ground. Was a problem found? #1 cyl. 4.4k Ω #2 cyl. 3.6k Ω #3 cyl. 3.1k Ω #4 cyl. 2.8k Ω Verify repair Go to Step 10 10 Check for proper ignition voltage output with a spark — Verify repair Go to Step 11 11 1. Remove the spark plugs and check for gas or oil fouling cracks, wear, improper gap, burned 2. If spark plugs are fouled, the cause of fouling must be determined before replacing the spark plugs. Was a problem found? — Verify repair Go to Step 12 12 Check for a loose ignition control module ground. — Verify repair Go to Step 13 13 1. Check the ignition coil secondary resistance. 2. Replace the coil if it is greater than the specified resistance. Did the coil require replacement? 2.5k Ω Verify repair Go to Step 14 Step Action Value(s) Yes No Temperature (°C) Resistance ( Ω) (Approximately) -20 32040 0 9788 20 3516 40 1439 60 656 80 327 100 175 120 100 |