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P2681 ENGINE COOLANT BYPASS VALVE EC-1201 < DTC/CIRCUIT DIAGNOSIS > [R9M] C D E F G H I J K L M A EC N P O Is the inspection result normal? YES >> GO TO 4. NO >> GO TO 3. 3. CHECK ENGINE COOLANT BYPASS VALVE POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect IPDM E/R harness connector. 3. Check the continuity between engine coolant bypass valve harness connector and IPDM E/R harness 4. Also check harness for short to gound. Is the inspection result normal? YES >> Check IPDM E/R. NO >> Repair or replace error-detected parts. 4. CHECK ENGINE COOLANT BYPASS VALVE CONTROL CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between engine coolant bypass valve harness connector and ECM harness connec- 4. Also check harness for short to power and short to ground. Is the inspection result normal? YES >> GO TO 5. NO >> Repair or replace error-detected parts. 5. CHECK ENGINE COOLANT BYPASS VALVE Check the engine coolant bypass valve. Refer to EC-1201, "Component Inspection" . Is the inspection result normal? YES >> INSPECTION END NO >> Replace engine coolant bypass valve. Component Inspection INFOID:0000000010935909 1. CHECK ENGINE COOLANT BYPASS VALVE 1. Turn ignition switch OFF. 2. Disconnect engine coolant bypass valve harness connector. 3. Check the resistance between engine coolant bypass valve as per the following conditions. + - Voltage Engine coolant bypass valve Connector Terminal F160 2 Ground Battery voltage + - Continuity Engine coolant bypass valve IPDM E/R Connector Terminal Connector Terminal F160 2 F72 73 Existed + - Continuity Engine coolant bypass valve ECM Connector Terminal Connector Terminal F160 1 F117 53 Existed |