Diagnostic Test

CHECK FOR AN ACTIVE DTC
NOTE:
Make sure the Torque Sensor (Grey) harness connector is connected properly before continuing with this procedure.
1. Turn the ignition on.
2. With the scan tool, read DTCs and record on vehicle work order.
  NOTE:
  Do not erase the DTCs at this time.
3. With the scan tool, read and record the Environmental Data to help identify the conditions in which the DTC was set.
  Is the DTC active?
  
  Yes
  - Go To 4
  No
  - Go To 2
VERIFY CUSTOMER COMPLAINT
1. Check with customer to verify loss or degradation of power steering assist.
  Was the customer complaint related to a loss or degradation of power steering assist?
  
  Yes
  - Go To 4
  No
  - Go To 3
CHECK FOR AN ACTIVE DTC
NOTE:
This DTC must be active for the results of this test to be valid.
1. Turn the ignition on.
2. With the scan tool, read the EPS DTCs.
3. With the scan tool, erase EPS DTCs.
4. Test drive the vehicle at road speeds above 30 km/h (19 mph).
5. Park the vehicle.
6. Turn the steering wheel from stop to stop.
7. With the scan tool, read EPS DTCs.
  Is the DTC active?
  
  Yes
  - Go To 4
  No
  - The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension and repair as necessary. If no problems are found, test complete.
  - Perform the EPS VERIFICATION TEST. Refer to: EPS VERIFICATION TEST .
CHECK RELATED HARNESS CONNECTIONS
1. Turn the ignition off.
  NOTE:
  Do not disconnect the Torque Sensor (Grey) harness connector and make sure it is connected properly.
2. Disconnect the EPS Module C1 and C2 harness connectors.
3. Disconnect all related in-line harness connections (if equipped).
4. Disconnect the related component harness connectors.
5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
  - Proper connector installation.
  - Damaged connector locks.
  - Corrosion.
  - Other signs of water intrusion.
  - Weather seal damage (if equipped).
  - Bent terminals.
  - Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
  - Terminals that have been pushed back into the connector cavity.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
6. Connect the EPS Module harness connectors. Be certain that the harness connectors are fully seated and the connector locks are fully engaged.
7. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
8. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
9. With the scan tool, erase DTCs.
10. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
11. With the scan tool, read EPS Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Electric Power Steering (EPS) Module in accordance with Service Information. Refer to GEAR, REMOVAL AND INSTALLATION .
  - Perform the EPS VERIFICATION TEST. Refer to: EPS VERIFICATION TEST .
  No
  - Perform the EPS VERIFICATION TEST. Refer to: EPS VERIFICATION TEST .
  - Test complete.