This illustration show you guide on how perform diagnostic system check engine control for ISUZU 2021 RG01 Euro 4JJ3 AWR6B45 Engine Control 4JJ3 with DPD.
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In order to ensure the smooth functioning of the ISUZU 2021 RG01 Euro 4JJ3 AWR6B45 Engine Control 4JJ3 with DPD, it is essential to perform regular diagnostic system checks. These checks help in identifying any potential issues or malfunctions in the engine control system, allowing for timely repairs and maintenance. In this article, we will provide a step-by-step guide on how to perform a diagnostic system check for the ISUZU 2021 RG01 Euro 4JJ3 AWR6B45 Engine Control 4JJ3 with DPD.
Precautions:
Before proceeding with the diagnostic system check, it is important to keep the following precautions in mind:
1. If there are no drivability complaints, it is not necessary to perform the diagnostic steps unless instructed otherwise.
2. Always check for any related Service Bulletins before starting the diagnosis.
3. Do not clear the Diagnostic Trouble Codes (DTC) unless specifically instructed to do so in the diagnostic steps.
4. If a malfunction is found in the engine starting system, refer to the symptom diagnosis related to engine starting.
5. Ensure that the battery is fully charged before proceeding with the diagnostic check.
6. Verify that the battery cable is in normal condition and securely connected.
7. The ground of the Engine Control Module (ECM) should be securely connected to the correct position.
8. Ensure that the ECM harness connectors are clean and correctly connected.
9. Never attempt to crank the engine with the ECM harness connectors disconnected.
10. Check that the ECM terminals are clean and correctly connected.
11. Verify if the Injector ID Code is programmed correctly.
12. Check whether the immobilizer information is programmed correctly.
13. If fuel system DTCs such as P0088, P0089, P1093, or other DTCs are set, diagnose sensor DTCs, solenoid DTCs, actuator DTCs, and relay DTCs first.
Step-by-Step Diagnostic System Check Guide:
Step 1: Scan tool power-up check
– Connect the scan tool and check if it powers up.
– If the scan tool powers up, proceed to the next step.
– If the scan tool does not power up, refer to the troubleshooting guide for “Scan tool does not power up” in section 51 of the Engine Control 1A Troubleshooting manual.
Step 2: Scan tool communication verification
– Turn on the ignition switch.
– Using the scan tool, check if communication with the ECM can be established.
– If communication with the ECM is established, proceed to the next step.
– If communication with the ECM cannot be established, refer to the troubleshooting guide for “Lost communication with the ECM” in section 51 of the Engine Control 1A Troubleshooting manual.
Step 3: Immobilizer-related DTC check
– Observe the DTC information with the scan tool.
– Check if any of the following DTCs are set: P0633, P161B, U0167, U2300, U2301, U2302, or U2303.
– If any of the immobilizer-related DTCs are set, refer to the respective DTC diagnosis in section 51 of the Engine Control 1A Troubleshooting manual.
– If no immobilizer-related DTCs are set, proceed to the next step.
Step 4: Control module DTC check
– Observe the DTC information for each control module with the scan tool.
– Check if the scan tool displays any DTC for any control module.
– If any DTC is displayed for a control module, refer to the communication-related DTC check in the next step.
– If no DTC is displayed for any control module, proceed to the cranking check.
Step 5: Communication-related DTC check
– Observe the DTC information with the scan tool.
– Check if any DTC beginning with “U” or any DTC related to communication with other control modules is set.
– If any communication-related DTC is set, refer to the respective DTC diagnosis in section 51 of the Engine Control 1A Troubleshooting manual.
– If no communication-related DTC is set, proceed to the control module internal-related DTC check.
Step 6: Control module internal-related DTC check
– Observe the DTC information with the scan tool.
– Check if any of the following DTCs are set: P0601, P0602, P0604, P0606, P060B, or P1621.
– If any control module internal-related DTC is set, refer to the respective DTC diagnosis in section 51 of the Engine Control 1A Troubleshooting manual.
– If no control module internal-related DTC is set, proceed to the system voltage-related DTC check.
Step 7: System voltage-related DTC check
– Observe the DTC information with the scan tool.
– Check if DTC P0563 is set.
– If DTC P0563 is set, refer to the DTC P0563 diagnosis in section 51 of the Engine Control 1A Troubleshooting manual.
– If DTC P0563 is not set, proceed to the other DTC check.
Step 8: Other DTC check
– Observe the DTC information with the scan tool.
– Check if any other DTCs are set.
– If any other DTCs are set, refer to the applicable DTC diagnosis in section 51 of the Engine Control 1A Troubleshooting manual.
– If no other DTCs are set, proceed to the cranking check.
Step 9: Cranking check
– Crank the engine and check if it starts.
– If the engine cranks, proceed to the engine start check.
– If the engine does not crank, diagnose the cause of the lack of cranking by referring to the troubleshooting guide for “Engine does not turn over” in section 202 of the Engine 15D Symptom manual.
Step 10: Engine start check
– Start the engine and check if it starts successfully.
– If the engine starts, proceed to the customer’s concern check.
– If the engine does not start, refer to the starting system check in section 51 of the Engine Control 1A Troubleshooting manual.
Step 11: Customer’s concern check
– Check if the customer’s concern is related to systems other than the engine.
– If the customer’s concern is related to systems other than the engine, refer to the applicable control system inspection.
– If the customer’s concern is not related to systems other than the engine, proceed to the symptom check.
Step 12: Symptom check
– Check if any of the applicable symptoms are present.
– If any applicable symptom is present, repair the respective symptom by referring to the respective symptom diagnosis in section 202 of the Engine 15D Symptom manual.
– If no applicable symptom is present, refer to the intermittent conditions of the engine in section 202 of the Engine 15D Symptom manual.
Conclusion:
Performing a diagnostic system check for the ISUZU 2021 RG01 Euro 4JJ3 AWR6B45 Engine Control 4JJ3 with DPD is crucial for ensuring the proper functioning of the engine control system. By following the step-by-step guide provided in this article, you can effectively diagnose and troubleshoot any potential issues or malfunctions. Regular diagnostic system checks help in maintaining the performance and reliability of the engine, resulting in a smooth driving experience.
For more guide about ISUZU,please refer to:ISUZU Trouble Repair.