For 1990-2009 cars

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 |

1. Connect the scan tool to the data link connector (DLC).
2. Turn the ignition switch to the ON position. Do not start the engine.
3. Attempt to establish communication with the power steering control module.

Does the scan tool communicate with the power steering control module?

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Go to Step 3

Go to Step 2

2 | Go to Scan Tool Does Not Comm. with Heater and A/C Ctrl in Data Link Communications for diagnosis. Did you complete the repair or replacement? | -- | Go to Step 4 | --
3 | Use the scan tool to read the power steering control DTCs. Does the scan tool display any current DTCs? | -- | Go to Diagnostic Trouble Code (DTC) List | Go to Step 5
4 |

1. Drive the vehicle above 24 km/h (15 mph) for several minutes.
2. Connect the scan tool to the data link connector (DLC).
3. Turn the ignition switch to the ON position. Do not start the engine.
4. Use the scan tool to read the power steering control DTCs.

Does the scan tool display any current DTCs?

--

Go to Diagnostic Trouble Code (DTC) List

Go to Step 5

5 | Are there any history DTCs stored in memory? | -- | Go to Step 6 | System OK
6 |

1. Review the appropriate DTC diagnosis table for the history DTC.
2. Review the diagnostic aids and the conditions for setting the DTC.
3. Review the procedures in Intermittents and Poor Connections Diagnosis in Wiring Systems.

Did you complete any repairs?

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System OK

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