Inspection and verification
WARNING: Observe all appropriate safety precautions when working on the fuel system. Failure to heed this warning could result in injury.
CAUTION: Maintain absolute cleanliness when handling these items. Always install plugs in all open holes or lines. Failure to follow this instruction may result in damage to the vehicle.
1. Check the customer's complaint.
2. Visually inspect for obvious signs of mechanical or electrical damage.
Visual check
|
Mechanical elements |
electrical equipment |
|
• Low/contaminated fuel • Fuel supply/return line (s) • Fuel tank and filler pipe • Leakage (And) fuel • Fuel filler cap • Fuel filter • Push-to-connect fittings • Fuel pressure control • Fuel manifold • injection pump • Exhaust gas recirculation system (EGR) |
• Fuses • Control lamp for glow plugs • Inertial fuel shutdown sensor (IFS) • Sensor (And) • The engine control unit (ECM) • Fuel intake control valve • Fuel rail pressure sensor • Fuel temperature sensor • Fuel burner (And) • EGR system |
3. If there is an obvious reason for the problem you identified or described by the client, eliminate it before proceeding to further actions (if possible).
4. Before Referring to the Symptom Table or DTC Index (DTC) read all DTCs with a validated diagnostic system or scan tool.
- Clear all DTCs after troubleshooting.
Symptom table
| sign | Possible reasons | Operation |
| The crankshaft turns, but the engine does not start | Check if the inertial switch is activated. Check if DTC P068A-00 is set (De-energization of the power supply relay of the engine control unit: early activation). See DTC help. Check ECM main relay and circuits. Refer to the electrical manual. Check the level and condition of the fuel. Drain approximately 1 liter of fuel and let it sit for 1 minute. Check that there is no separation indicating the presence of water or other liquid in the fuel. Check air intake system for leaks. Check the low pressure fuel system for leaks/damage. Check the fuel filter, check for DTCs indicating a malfunction of the injection pump. Check high pressure fuel pump: For more information refer to: Fuel pump (303-04A Fuel supply and controls - Diesel engine ID4 2.4L, Removal and installation). Check the CKP sensor circuits. Refer to electrical manuals. Install a new crankshaft position sensor if necessary (TFR). For more information refer to: Crankshaft Position Sensor (TFR) (303-14 Electronic controls - Diesel engine ID4 2.4L, Removal and installation). | |
| Difficult start | NOTE: Make sure the latest throttle inlet EGR valve is installed. Using the manufacturer approved diagnostic system, check and install the latest software version on the engine control unit. Check the electrical circuits of the glow plugs. Refer to electrical manuals. Check fuel level/condition. Drain approximately 1 liter of fuel and let it sit for 1 minute. Check that there is no separation indicating the presence of water or other liquid in the fuel. Check air intake system for leaks. Check the low pressure fuel system for leaks/damage. Check the fuel filter, check for DTCs indicating a fuel intake control valve failure. EGR valve checks: For more information, see: Emission Control (303-08 Emission Control - ID4 2.4L Diesel Engine, Diagnostics and Checks). | |
| Uneven idle operation | NOTE: Make sure the latest throttle inlet EGR valve is installed. Using the manufacturer approved diagnostic system, check and install the latest software version on the engine control unit. Check air intake system for leaks. Check fuel level/condition. Drain approximately 1 liter of fuel and let it sit for 1 minute. Check that there is no separation indicating the presence of water or other liquid in the fuel. Check the low pressure fuel system for leaks/damage. Check the fuel filter, check for DTCs indicating a fuel intake control valve failure. EGR valve checks: For more information, see: Emission Control (303-08 Emission Control - ID4 2.4L Diesel Engine, Diagnostics and Checks). | |
| Ned remaining power during acceleration | NOTE: Make sure the latest throttle inlet EGR valve is installed. Using the manufacturer approved diagnostic system, check and update the engine control unit with the latest software version. Check the air intake system for leaks or blockages. Check for blockage/clogging in the exhaust system, install new elements if necessary. For more information refer to: Catalytic Converter (309-00 Exhaust system -Diesel engine ID4 2.4L, Removal and installation). Check for diagnostic trouble codes (DTC), indicating incorrect fuel pressure. For EGR valve checks: For more information, refer to: Emission Control (303-08 Emission Control -ID4 2.4L Diesel Engine, Diagnostics and Checks). Check if the variable geometry turbocharger actuator lever moves. For more information refer to: Turbocharger actuator rod (303-04B Fuel supply and controls - turbocharger - ID4 2.4L diesel engine, Removal - Refitting). For turbocharger actuator checks: For more information refer to: Turbocharger (303-04B Fuel supply and controls - turbocharger - Diesel engine ID4 2.4L, | |
| Engine stops/stops | NOTE: Make sure the latest throttle inlet EGR valve is installed. Using the manufacturer's approved diagnostic system, check and install the latest software on the engine control unit. Check the air intake system for leaks. Check fuel level/condition. Drain approximately 1 liter of fuel and let it sit for 1 minute. Check that there is no separation indicating the presence of water or other liquid in the fuel. Check the fuel system for leaks/damage. Check for DTCs indicating a malfunction in the fuel intake control valve. EGR valve checks: For more information, see: Emission Control (303-08 Emission Control -ID4 2.4L Diesel Engine, Diagnostics and Checks). | |
| Engine vibration | Check fuel level/condition. Drain approximately 1 liter of fuel and let it sit for 1 minute. Check that there is no separation indicating the presence of water or other liquid in the fuel. Check air intake system for leaks. Check the low pressure fuel system for leaks/damage. Check the high pressure fuel system for leaks. Check for DTCs indicating a malfunction in the fuel intake control valve. Check high pressure fuel pump: For more information refer to: Fuel pump (303-04A Fuel supply and controls - Diesel engine ID4 2.4L, Removal and installation). | |
| Excessive fuel consumption | NOTE: Make sure the latest throttle inlet EGR valve is installed. Using the manufacturer approved diagnostic system, check and install the latest software on the engine control unit. Check the low pressure fuel system for leaks/damage. Check for DTCs indicating a malfunction in the fuel intake control valve. Check the fuel temperature sensor, high pressure fuel pump, etc. for leaks. Check for injector related DTCs. EGR valve checks: For more information, see: Emission Control (303-08 Emission Control -ID4 2.4L Diesel Engine, Diagnostics and Checks). |
See section 100-00 for a complete list of DTCs that can be logged in the vehicle. For more information, see: How to use this manual (100-00 General information, Description and principle of operation).
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