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P2181-COOLING SYSTEM PERFORMANCE (CONTINUED) For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS). For a complete wiring diagram Refer to Section 8W. • When Monitored: • Set Condition: Possible Causes LOW COOLANT LEVEL (K2) ECT SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE (K2) ECT SIGNAL CIRCUIT OPEN (K900) SENSOR GROUND CIRCUIT OPEN (K2) ECT SIGNAL CIRCUIT SHORTED TO GROUND (K2) ECT SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND THERMOSTAT ECT SENSOR PCM Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - Diagnostic Test 1. ACTIVE DTC Ignition on, engine not running. NOTE: If this code sets during extreme ambient temperatures, improper installation of a block heater could Diagnose all other ECT and Cooling System codes before continuing. Is the DTC active at this time? Yes >> Go To 2 No >> Refer to the INTERMITTENT CONDITION Diagnostic Procedure. Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE) 9 - 958 ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L DR/DH |