For 1990-2009 cars

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Steering Assist Schematics Connector End View Reference: Steering Assist Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Raise the vehicle's drive wheels. Refer to Lifting and Jacking the Vehicle .
3. Start the engine.
4. Place the transmission into drive for an automatic transmission or third gear for a manual transmission.
5. With the scan tool, observe the Vehicle Speed parameter in the Speed Sensitive Steering data list.

Does the Vehicle Speed parameter match the speedometer display?

Go to Symptoms - Power Steering System

Go to Step 3

3 | Test for an open or poor connection on the vehicle speed circuit of the speed sensitive power steering (SSPS) control module. Refer to Testing for Continuity and LINK . Did you find and correct the condition? | Go to Step 6 | Go to Step 4
4 | Test for a poor connection on the ground circuit of the SSPS control module. Refer to Testing for Continuity and LINK . Did you find and correct the condition? | Go to Step 6 | Go to Step 5
5 | Replace the SSPS control module. Refer to Power Steering Control Module Replacement . Is the repair complete? | Go to Step 6 | --
6 | Operate the system in order to verify the repair. Did you correct the condition? | System OK | Go to Step 2