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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- If there are no complaints on drivability, do not perform these diagnostic steps unless otherwise instructed in other sections.
- Check for related Service Bulletins before starting the diagnosis.
- Do not clear the DTC unless instructed to do so in a diagnostic step.
- If a malfunction is found in the engine starting system, check the symptom diagnosis relating to the engine starting.
- The battery should be fully charged.
- The battery cable should be normal and securely connected.
- The ground of the ECM should be securely connected to the correct position.
- The ECM harness connectors should be clean and correctly connected.
- Do not attempt to crank the engine with the ECM harness connectors disconnected.
- The ECM terminals should be clean and correctly connected.
- Check if the Injector ID Code is programmed correctly.
- Check whether the immobilizer information is programmed correctly.
- If fuel system DTC P0088, P0089, P1093 or other DTCs are set, diagnose sensor DTCs, solenoid DTCs, actuator DTCs, and relay DTCs first.
Step 1:Scan tool power-up check
1) Connect the scan tool. Does the scan tool power up?
Yes
=>Go to Scan tool communication verification.
No
Go to Scan tool does not power up.
Refer to
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