Chart 9

SYSTEM/COMPONENT	REFERENCE (PINPOINT TESTS -- GASOLINE MODELS unless noted)
Verify the engine operates at normal temperature	Visual. REFER to the appropriate ENGINE COOLING article or STEP 2: NO DIAGNOSTIC TROUBLE CODES (DTCS) PRESENT SYMPTOM CHART INDEX to diagnose any cooling system concerns that are present.
Verify correct coolant level and coolant concentration	REFER to the appropriate ENGINE COOLING article for proper coolant concentrations and fill procedures.
MAF Sensor	GO to Pinpoint Test DC .
Base Engine	REFER to the appropriate ENGINE article .
Fuel Delivery System	GO to Pinpoint Test HC .
Secondary Ignition System	For vehicles equipped with a coil pack ignition system, GO to Pinpoint Test JC . For all others, GO to Pinpoint Test JB .
PCV System	GO to Pinpoint Test HG .
Engine Oil Quality	Visual
Additional Testing	GO to Pinpoint Test Z .