RL V6-3.5L (2007)
Engine Control Module: Removal and Replacement
PCM Replacement
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 PCM after substituting a known good PCM, reinstall the original PCM, then do this procedure.
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During the procedure, if any READ DATA, WRITE DATA, or other data checks fail, note the failure, then continue.
1. Connect the HDS to the data link connector (DLC) (A) located under the driver's side of the dashboard.
2. Turn the ignition switch ON (II).
3. Make sure the HDS communicates with the PCM. 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 4 through 9, 16 through 18, 21, and 22, then do this after replacing the PCM:
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Replace the engine oil and the engine oil filter.
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Clean the throttle body.
4. Select the PGM-FI system with the HDS.
5. Select the INSPECTION MENU with the HDS.
6. 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.
7. Select the REPLACE PCM MENU, then select 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 PCM so you can later download (WRITE) it into the new PCM.
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If READ DATA indicates FAILED, continue with this procedure.
8. Turn the ignition switch OFF.
9. Jump the SCS line with the HDS.
10. Remove the panels (A), and pull back the carpet.
11. Remove the ducts (B).
12. Disconnect the PCM connectors (C).
13. Remove the bolts (D), then remove the PCM (E).
14. Install the parts in the reverse order of removal.
