Civic L4-1.8L CNG (2008)
Engine Control Module: Removal and Replacement
ECM/PCM Replacement
Special Tools Required
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Honda diagnostic system (HDS) tablet tester
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Honda interface module (HIM) and an iN workstation with HDS and CM update software
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HDS pocket tester
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GNA-600 and an iN workstation with HDS and CM update software
NOTE:
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Make sure the HDS is loaded with the latest software version.
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If you are replacing the ECM/PCM after substituting a known-good ECM/PCM, reinstall the original ECM/PCM, then do this procedure.
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During the procedure, is any READ DATA, WRITE DATA, or other data checks fail, note the failure, then continue.
1. Make sure you have the anti-theft code for the audio system or the navigation system (if equipped), then write down the audio presets.
2. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
3. Turn the ignition switch ON (II).
4. Make sure the HDS communicates with the ECM/PCM and other vehicle systems. If it doesn't, go to the DLC circuit troubleshooting. See:
Powertrain Management/Computers and Control Systems/Testing and Inspection/Component Tests and General Diagnostics/DLC Circuit
Troubleshooting If you are returning from DLC circuit troubleshooting, skip steps 5 through 10,19 through 24, and 27 through 29, and do these
procedures after replacing the ECM/PCM (USA, Canada models):
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Replace the engine oil and the engine oil filter.
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Replace the ATF (A/T model).
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Clean the throttle body.
5. USA, Canada models: Select the PGM-FI system with the HDS.
6. USA, Canada models: Select the INSPECTION MENU with the HDS.
7. USA, Canada models: Select the ETCS TEST, then select the TP POSITION CHECK, and follow the screen prompts.
NOTE: If the TP POSITION CHECK indicates FAILED, continue with this procedure.
8. USA, Canada models: Select the REPLACE ECM/PCM MENU, then READ DATA, and follow the screen prompts.
NOTE:
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Doing this step copies (READS) the engine oil life data from the original ECM/PCM so you can later download (WRITES) it into the new
ECM/PCM.
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If READ DATA indicates FAILED, continue with this procedure.
9. USA, Canada models A/T: Select the A/T system with the HDS.
10. USA, Canada models A/T: Select the REPLACE TCM/PCM MENU, then READ DATA, and follow the screen prompts.
NOTE:
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Doing this step copies (READS) the ATF life data from the original PCM so you can later download (WRITES) it into the new PCM.
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If READ DATA indicates FAILED, continue with this procedure.
11. Turn the ignition switch OFF.
12. Remove the battery.
13. Remove the cover (A).
