DSG-423 ENGINE CONTROLS
08-1
Subject Page
General Information ........................................................................................................................................ 08 - 2
GCP and Sensors ..................................................................................................................................... 08 - 2
Fuel System Components - Gasoline........................................................................................................ 08 - 8
Coil-on-plug Ignition .................................................................................................................................. 08 - 9
Open Loop and Closed Loop Operation.................................................................................................. 08 - 10
Adaptive Learn........................................................................................................................................ 08 - 10
GCP Service Precautions........................................................................................................................ 08 - 10
Use of Circuit Testing Tools .................................................................................................................... 08 - 10
Electrostatic Discharge Damage............................................................................................................. 08 - 10
Diagrams and Schematics ...................................................................................................................... 08 - 11
Engine Component Locator View............................................................................................................ 08 - 23
Connector End Views.............................................................................................................................. 08 - 16
Diagnosis and Testing.................................................................................................................................. 08 - 24
Diagnostic Approach ............................................................................................................................... 08 - 24
GCP Diagnostic Overview....................................................................................................................... 08 - 24
On-Board Diagnostics - GCP .................................................................................................................. 08 - 24
Engine Control Module (GCP) Limp Home Mode Strategy..................................................................... 08 - 24
Intermittent MIL ....................................................................................................................................... 08 - 25
Malfunction Indicator Lamp (MIL) DTC Retrieval Procedure................................................................... 08 - 25
Diagnosis Using a Personal Computer ................................................................................................... 08 - 26
Visual Inspection ..................................................................................................................................... 08 - 36
Intermittent Problems.............................................................................................................................. 08 - 36
Symptom Charts...................................................................................................................................... 08 - 37
Engine Control Module (GCP) - Diagnostic Trouble Codes.................................................................... 08 - 40
Removal and Installation.............................................................................................................................. 08 - 43
Camshaft Position (CMP) Sensor - Replacement................................................................................... 08 - 43
Crankshaft Position (CKP) Sensor - Removal......................................................................................... 08 - 43
Crankshaft Position (CKP) Sensor - Installation...................................................................................... 08 - 44
Cylinder Head Temperature (CHT) Sensor - Replacement .................................................................... 08 - 45
Engine Coolant Temperature (ECT) Sensor - Replacement................................................................... 08 - 45
Heated Oxygen Sensor (HO2S) - Replacement ..................................................................................... 08 - 45
Knock Sensor (KS) - Replacement ......................................................................................................... 08 - 46
Temperature Manifold Absolute Pressure (TMAP) Sensor - Replacement............................................. 08 - 46
Actuator/Throttle Position (TP) Sensor - Replacement ........................................................................... 08 - 46
Specifications................................................................................................................................................ 08 - 47
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