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Purpose

Check for unacceptable engine performance at full load and rated speed by means of maximum boost, minimum fuel pressure, and minimum Injection Control Pressure (ICP)

Tools

• Electronic Service Tool (EST) with ServiceMaxx™

software

• NAVCoM or NAVLink Interface Kit

WARNING: To prevent personal injury or death, read all safety instructions in the “Safety Information” section of this manual.

1. Turn ignition switch to ON, engine OFF.

2. Using ServiceMaxx™ software, load the Performance session.

3. Start engine.

4. Find an open stretch of road. Start recording.

When driving conditions are safe, select a suitable gear, press the accelerator pedal fully to the floor, and accelerate to rated speed at 100 percent load.

Figure 112 Performance Diagnostics

5. When road test is complete, stop recording.

6. Review recorded results at 100 percent engine load at the rated speed specified in the Performance Specifications.

• If FDP is below 517 kPa (75 psi), see Fuel System (page 113) in “HARD START AND NO START DIAGNOSTICS”.

• If engine does not accelerate smoothly, feels unbalanced, (not running on all cylinders), perform Fuel Aeration Test (page 136), Relative Compression Test (page 145), and Cylinder Cut Out Test (page 146).

• If DPFDP is above kPa 14 (2 psi), go to AFT System (Aftertreatment) (page 194) in “ELECTRONIC CONTROL SYSTEM DIAGNOSTICS”.

• If ICP is below specification, go to ICP System Test (page 138).

• If EBP is above specification, remove turbocharger intake tube and inspect for turbocharger damage.

• If IMP is below specification, check for exhaust or intake restriction, wastegate system faults, engine brake faults, fueling issues, turbo issues, air cleaner issues, or ETV faults. Perform the Crankcase Pressure Test (page 143).

Table of Contents

Description...153 Section Information...153 Electronic Control System Diagnostics Form EGED-495...154 Diagnostic Form Example...154 Sensor and Actuator Locations...155 Engine Mounted Components...155 Vehicle Mounted Components...160 Diagnostic Procedure Process...160 Description...160 Diagnostics with EST...160 Diagnostics without EST...160 Sensor End Diagnostics (with ServiceMaxx™ software)...161 Sensor End Diagnostics (2-Wire)...161 Sensor End Diagnostics (3-Wire)...163 Pin-point Diagnostics (without ServiceMaxx™ software)...166 Actuator Operational Voltage Check – Output State Test...166 Harness Resistance Check...167 Operational Voltage Check...168 Circuit Diagnostics...169 ACT PWR Relay (Actuator Power)...169 ACT PWR Relay Pin-point Diagnostics...170 ACT PWR Circuit Operation...172 ACM Power (Aftertreatment Control Module)...173 ACM PWR Pin-point Diagnostics...174 ACM VREF Circuits...177 ACM VREF Circuit...178 AFTFD (aftertreatment Fuel Doser)...180 AFTFD Connector End Diagnostics...182 Aftertreatment Fuel Inlet Sensor (AFTFIS)...184 AFTFIS Sensor End Diagnostics...185 AFTFIS Pin-Point Diagnostics...186 AFTFIS Circuit Operation...187 Aftertreatment Fuel Pressure 2 Sensor (AFTFP2)...188 AFTFP2 Sensor End Diagnostics...189 AFTFP2 Pin-point Diagnostics...190 AFTFP2 Circuit Operation...190

DPF Filter Cleanliness Test...204 Regen Inhibitors...206 Parked Regen Checks...207 DPF Filter Inspection...209 AMS (Air Management System)...217 AMS Diagnostics...218 APP Sensor (Accelerator Pedal Position)...223 APP Sensor End Diagnostics...224 APP Pin-point Diagnostics...227 APP Circuit Operation... 228 ATA Datalink (American Trucking Association)...229 ATA Pin-point Diagnostics...230 ATA Operation...231 CCS (Cruise Control System)...232 CCS Pin-point Diagnostics ...233 CKP Sensor (Crankshaft Position)...235 CKP Pin-point Diagnostics...236 CKP Circuit Operation...237 CMP Sensor (Camshaft Position)...238 CMP Pin-point Diagnostics...239 CMP Circuit Operation...240 Cylinder Balance...241 Cylinder Balance Operation...241 Cylinder Balance Diagnostics...242 DOCIT Sensor (Diesel Oxidation Catalyst Inlet Temperature)...244 DOCIT Sensor End Diagnostics...246 DOCIT Pin-point Diagnostics...248 DOCIT Circuit Operation...248 DPFDP Sensor (Diesel Particulate Filter Differential Pressure)...249 DPFDP Sensor End Diagnostics...251 DPFDP Pin-point Diagnostics...254 DPFDP Circuit Operation...254 DPFIT Sensor (Diesel Particulate Filter Inlet Temperature)...255 DPFIT Sensor End Diagnostics...257 DPFIT Pin-point Diagnostics...259 DPFIT Circuit Operation...259 DPFOT Sensor (Diesel Particulate Filter Outlet Temperature).. .. . .. .. .. .. .. .. . .. .. .. .. .. .. .. . .. .. ..260 DPFOT Sensor End Diagnostics...262 DPFOT Pin-point Diagnostics...264 DPFOT Circuit Operation...264 EBP Sensor (Exhaust Back Pressure)...265 EBP Sensor End Diagnostics...266 EBP Pin-point Diagnostics...268 EBP Circuit Operation... 268 EBPV (Exhaust Back Pressure Valve)...269 EBPV Pin-point Diagnostics...270 EBPV Circuit Operation...271 ECB Valve (Engine Compression Brake)...272 ECB Pin-point Diagnostics...273 ECB Circuit Operation...275 ECBP Sensor (Engine Compression Brake Pressure)...276

ECBP Sensor End Diagnostics...277 ECBP Pin-point Diagnostics...279 ECBP Circuit Operation...280 ECI Circuit (Engine Crank Inhibit)...281 ECI Circuit Diagnostics...282 ECI Circuit Operation...285 ECL Switch (Engine Coolant Level)...286 ECL Switch Pin-point Diagnostics...287 ECL Circuit Operation...288 ECM PWR (Engine Control Module Power)...289 ECM PWR Pin-point Diagnostics...290 ECM PWR Circuit Operation...292 ECM Self Diagnostics (Engine Control Module)...293 ECM Self Diagnostic DTC’s...294 ECT1 Sensor (Engine Coolant Temperature 1)...295 ECT1 Sensor End Diagnostics...297 ECT1 Pin-point Diagnostics...299 ECT1 Circuit Operation...299 EFC (Engine Fan Control)...300 EFC Circuit Diagnostics...301 EFC Circuit Operation...303 EGR Actuator (Exhaust Gas Recirculation)...304 EGR Pin-point Diagnostics...305 EGR Circuit Operation...307 EGT Sensor (Exhaust Gas Temperature)...308 EGT Sensor End Diagnostics...310 EGT Pin-point Diagnostics...311 EGT Circuit Operation... 312 EOP Sensor (Engine Oil Pressure)...313 EOP Sensor End Diagnostics...314 EOP Pin-point Diagnostics...315 EOP Circuit Operation...316 EOT Sensor (Engine Oil Temperature)...317 EOT Sensor End Diagnostics...318 EOT Pin-point Diagnostics...321 EOT Circuit Operation... 321 ETV (Engine Throttle Valve)...322 ETV Actuator End Diagnostics...324 ETV Actuator Pin-point Diagnostics...326 EWPS (Engine Warning and Protection System)...329 EWPS Programmable Parameters...331 FDP Sensor (Fuel Delivery Pressure) ...334 FDP Sensor End Diagnostics...335 FDP Pin-point Diagnostics...338 FDP Circuit Operation...338

ICP Sensor (Injection Control Pressure)...349 ICP Sensor End Diagnostics...350 ICP Pin-point Diagnostics...352 ICP Circuit Operation...353 ICP System (Injection Control Pressure)...354 ICP System Diagnostics...356 ICP System Operation...358 IMP Sensor (Intake Manifold Pressure)...360 IMP Sensor End Diagnostics...362 IMP Pin-point Diagnostics...364 IMP Circuit Operation...364 IMT Sensor (Intake Manifold Temperature)...365 IMT Sensor End Diagnostics...366 IMT Pin-point Diagnostics...368 IMT Circuit Operation...368 Injector Circuits...369 Injector 1 Checks...371 Injector 2 Checks...373 Injector 3 Checks...375 Injector 4 Checks...377 Injector 5 Checks...379 Injector 6 Checks...381 Injector Circuit Operation...383 IPR (Injection Pressure Regulator)...384 IPR Pin-point Diagnostics...385 IPR Circuit Operation...386 IST System (Idle Shutdown Timer)...387 Function...387 J1939 Data Link...390 J1939 Data Link Pin-point Diagnostics...391 J1939 Data Link Circuit Operation...392 MAF Sensor (Mass Air Flow)/Air Intake Temperature Sensor (AIT). .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. ..394 MAF/AIT Sensor End Diagnostics...395 MAF Pin-point Diagnostics...399 MAF Circuit Operation...400 TC2WC Solenoid (Turbocharger 2 Wastegate Control)...401 Service Interval Messages...402 TC2WC Pin-point Diagnostics...403 TC2WC Circuit Operation...404 VREF (Reference Voltage)...405 VREF Pin-point Diagnostics...407 VREF Circuit Operation...412 WIF Sensor (Water In Fuel)...413 WIF Pin-point Diagnostics...414 WIF Circuit Operation...416

Description

Section Information

All electrical faults in the engine control system can be diagnosed in this section. All components are divided into separate test procedures and contain the following information:

• DTC with possible cause

• Circuit diagram

• Component function

• Circuit operation

• Component location

• Diagnostic tool list

• Sensor End Diagnostics (with ServiceMaxx™

software)

• Pin-point Diagnostics (without ServiceMaxx™

software)

• Harness resistance check

• Operational voltage check (most components)

Electronic Control System