DTC    P0234    Turbocharger / Supercharger Overboost Condition

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ANY OTHER DTCS OUTPUT (IN ADDITION TO DTC P0234 AND/OR P0299)

READ VALUE USING INTELLIGENT TESTER (MAP AND TARGET BOOSTER PRESSURE)

CHECK INTAKE SYSTEM

REPAIR OR REPLACE INTAKE SYSTEM

INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)

CHECK WHETHER DTC OUTPUT RECURS (DTC P0234 OR P0299)

INSPECT TURBOCHARGER SUB-ASSEMBLY (DC MOTOR)

CHECK HARNESS AND CONNECTOR (DC MOTOR - ECM)

READ VALUE USING INTELLIGENT TESTER (MANIFOLD ABSOLUTE PRESSURE)

CHECK HARNESS AND CONNECTOR (TURBO PRESSURE SENSOR - ECM)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (DIESEL THROTTLE TARGET ANGLE)

CHECK HARNESS AND CONNECTOR (DIESEL THROTTLE BODY - ECM)

PERFORM ACTIVE TEST USING INTELLIGENT TESTER (CONTROL THE EGR STEP POSITION)

CHECK HARNESS AND CONNECTOR (ELECTRIC EGR VALVE ASSEMBLY - ECM)

INSPECT ELECTRIC EGR CONTROL VALVE ASSEMBLY

CHECK FOR DEPOSIT (EGR PASSAGE)

CHECK EXHAUST GAS LEAK

REPLACE TURBOCHARGER SUB-ASSEMBLY

REPLACE TURBO PRESSURE SENSOR

REPLACE ELECTRIC EGR CONTROL VALVE ASSEMBLY

REPLACE DIESEL THROTTLE BODY ASSEMBLY

REPAIR OR REPLACE HARNESS OR CONNECTOR

REMOVE DEPOSIT (CLEAN EGR PASSAGE)

REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

CHECK WHETHER DTC OUTPUT RECURS (DTC P0234 OR P0299)

REPLACE ECM

CONFIRM WHETHER MALFUNCTION HAS BEEN SUCCESSFULLY REPAIRED