CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO P0136, P0137 OR P0138)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (OPERATE EGR VALVE)
CHECK WHETHER DTC OUTPUT RECURS (DTC P0401)
READ OUTPUT DTC (DTC P0136, P0137 OR P0138)
READ VALUE USING INTELLIGENT TESTER (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT)
INSPECT HEATED OXYGEN SENSOR (CHECK FOR SHORT)
READ VALUE USING INTELLIGENT TESTER (OUTPUT VOLTAGE OF HEATED OXYGEN SENSOR)
PERFORM CONFIRMATION DRIVING PATTERN
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136)
PERFORM CONFIRMATION DRIVING PATTERN
CHECK WHETHER DTC OUTPUT RECURS (DTC P0136)
PERFORM ACTIVE TEST USING INTELLIGENT TESTER (INJECTION VOLUME)