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EC-842 [QG (WITHOUT EURO-OBD)] IAT SENSOR Diagnostic Procedure EBS00R23 1. CHECK OVERALL FUNCTION 1. Turn ignition switch “ON”. 2. Check voltage between ECM terminal 34 and ground with CON- OK or NG OK >> INSPECTION END. NG >> GO TO 2. 2. CHECK INTAKE AIR TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 1. Turn ignition switch “OFF”. 2. Disconnect mass air flow sensor (intake air temperature sensor 3. Turn ignition switch “ON”. 4. Check voltage between mass air flow sensor terminal 5 and OK or NG OK >> GO TO 3. NG >> Repair open circuit or short to ground or short to power in harness or connectors. 3. CHECK INTAKE AIR TEMPERATURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. 2. Disconnect ECM harness connector. 3. Check harness continuity between ECM terminal 67 and mass air flow sensor terminal 3. 4. Also check harness for short to ground and short to power. OK or NG OK >> GO TO 4. NG >> Repair open circuit or short to ground or short to power in harness or connectors. Voltage: Approximately 0 - 4.8V MBIB0041E MBIB0096E Voltage: Approximately 5V PBIB0066E Continuity should exist. |