|
|
Content .. 1101 1102 1103 1104 ..
P2181-COOLING SYSTEM PERFORMANCE (CONTINUED) 2. LOW COOLANT LEVEL NOTE: If an Engine Coolant Temperature (ECT) DTC is set along with this code, diagnose the ECT DTC first. NOTE: Inspect the ECT terminals and related PCM terminals. Ensure the terminals are free from corrosion NOTE: The best way to diagnose this DTC is to allow the vehicle to sit overnight outside in order to have NOTE: Extremely cold outside ambient temperatures may have caused this DTC to set. NOTE: Need to make sure that no Cooling System DTCs are set or changes that would make the warm up WARNING: Never open the cooling system when the engine is hot. The system is under pressure. Failure to Is the coolant level and condition OK? Yes >> Go To 3 No >> Inspect the vehicle for a coolant leak and add the necessary amount of coolant. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 3. THERMOSTAT NOTE: This test works best if performed on a cold engine (cold soak). With a scan tool, read the Eng Coolant Tmp Deg value. If the engine was allowed to sit overnight (cold soak), the NOTE: If engine coolant temperature is above 82°C (180°F), allow the engine to cool until 65°C (150°F) is During engine warm-up monitor the Eng Coolant Tmp Deg value. The temp deg value change should be a smooth NOTE: As the engine warms up to operating temperature, the actual coolant temperature (thermometer read- Did the thermostat open at the proper temperature? Yes >> Go To 4 No >> Replace the thermostat. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 1008 ENGINE ELECTRICAL DIAGNOSTICS WK |