Lack of Power ................................................................................................................................ 956 High Idle Engine Speed ................................................................................................................. 958 Solenoid Switch Malfunction.......................................................................................................... 959 Exhaust Brake Malfunction ............................................................................................................ 960 EGR System Malfunction...............................................................................................................
965 Variable Swirl System (VSS) System Malfunction (Equipped with Exhaust gas recirculation and VSS) ...................................................................................................................................... 968 Aneroid Compensator Malfunction................................................................................................. 972 Quick Warm System (QWS) Malfunction....................................................................................... 975 Fast Idle Control Device (FICD) System Malfunction ....................................................................
980 Special Tools ...................................................................................................................................... 983 Diagnosis (4HG1-T only) .................................................................................................................... 985 Strategy-Based Diagnostics........................................................................................................... 985 General Service Information ...............................................................................................................
986 Troubleshooting ............................................................................................................................. 987 Self-diagnosis Functions................................................................................................................ 987 Diagnosis Trouble Code (DTC) List............................................................................................... 990 Location of Sensor and Switch ......................................................................................................
991 Parts Location................................................................................................................................ 993 Engine Control Module (ECM)....................................................................................................... 994 Chart of Engine Control Module (ECM) Input/Output .................................................................... 995 Location of the Engine Control Module (ECM) Connector............................................................. 996 Location of Data Link Connector (DLC).........................................................................................
996 Engine Control Module (ECM) System Wiring Diagram ................................................................ 998 Auxiliary Engine Control System (Equipped with Exhaust gas recirculation (EGR)) ..................... 999 Vacuum Switching Valve (VSV) Circuit (Equipped with Exhaust gas recirculation (EGR)) ......... 1000 Exhaust Brake Control................................................................................................................. 1001 DTC-13 Engine Coolant Temperature (ECT) Sensor Circuit High Voltage ................................. 1002 DTC-14 Engine Coolant Temperature (ECT) Sensor Circuit Low Voltage ..................................
1005 DTC-21 Rack Sensor Circuit Low Voltage................................................................................... 1008 DTC-22 Rack Sensor Circuit High Voltage.................................................................................. 1011 DTC-31 Exhaust Gas Recirculation (EGR) Vacuum Switching Valve (VSV) Solenoid Control Low Voltage.................................................................................................... 1014 DTC-32 Exhaust Gas Recirculation (EGR) Vacuum Switching Valve (VSV) Solenoid Control High Voltage....................................................................................................
1017 DTC-41 Quick On Start (QOS) Relay Control Circuit Low Voltage.............................................. 1020 DTC-42 Quick On Start (QOS) Relay Control Circuit High Voltage............................................. 1024 DTC-52 Electronically Erasable Programmable Read Only Memory (EEPROM) Error .............. 1027 Without Diagnosis Trouble Code ...................................................................................................... 1028 Startup Failure (Quick On Start (QOS) only) ...............................................................................
1029 Black Smoke (Excessive) ............................................................................................................ 1031 Lack of Power .............................................................................................................................. 1033 Exhaust Brake Malfunction (Exhaust Brake only) ....................................................................... 1035 Exhaust Gas Recirculation (EGR) System Malfunction............................................................... 1041 Special Tools ....................................................................................................................................
1044 EXHAUST .............................................................................................................................................. 1045 General Description .......................................................................................................................... 1045 Component .................................................................................................................................. 1045 Gasket .........................................................................................................................................
1045 On-vehicle Service............................................................................................................................ 1047 Component .................................................................................................................................. 1047 Removal....................................................................................................................................... 1047 Installation....................................................................................................................................
1048 TURBOCHARGER................................................................................................................................. 1049 General Description ......................................................................................................................... 1049 On-vehicle Service ........................................................................................................................... 1050 Charge Air Pipe............................................................................................................................
1050 Intake Manifold............................................................................................................................. 1050 Turbocharger ............................................................................................................................... 1051 Inspection and Repair.................................................................................................................. 1052