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EC-1154 < COMPONENT DIAGNOSIS > [K9K] P0380 GLOW RELAY P0380 GLOW RELAY DTC Logic INFOID:0000000001162618 DTC DETECTION LOGIC NOTE: The DTC is declared present after attempts have been made to start the engine. • Special notes: If the DTC is present, it will be difficult to start the vehicle, or even impossible when cold, or preheating will Diagnosis Procedure INFOID:0000000001162619 1. CHECK GLOW RELAY POWER SUPPLY CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect glow relay harness connector. 3. Turn ignition switch ON. 4. Check the voltage between glow relay connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> GO TO 2. 2. DETECT MALFUNCTIONING PART Check the following. >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK GLOW RELAY INPUT CIRCUIT FOR OPEN AND SHORT-I 1. Turn ignition switch OFF. 2. Disconnect ECM harness connector. 3. Check the continuity between glow relay harness connector and ECM harness connector. 4. Also check harness for short to ground and short to power. Is the inspection result normal? YES >> GO TO 4. NO >> Repair open circuit or short to ground or short to power in harness or connectors. DTC No. Trouble diagnosis name Possible cause P0380 GLOW PLUG DIAGNOSTIC CONNECTION • Harness or connectors (The glow relay circuit is open or shorted.) • Glow relay Glow relay Ground Voltage Connector Terminal F55 3 Ground Battery voltage Glow relay ECM Continuity Connector Terminal Connector Terminal F55 9 F11 80 Existed |