How to Troubleshoot DTCs
The troubleshooting procedures assume that the cause of the problem is still present and the EPS indicator is still on, Following the procedure when the EPS indicator does not come on can result in incorrect diagnosis.
Question the customer about the conditions when the problem occurred, and try to reproduce the same conditions for troubleshooting. Find out when the EPS indicator came on, such as during EPS control, after EPS control, when the vehicle was at a certain speed, etc.
When the EPS indicator does not come on during the test-drive, but troubleshooting is done based on the DTC, check for loose connectors, poor terminal contact, etc, in the affected circuit before you start troubleshooting.
After troubleshooting, clear the DTC and test-drive the vehicle. Be sure the EPS indicator does not come on.
Did you have any codes from this system?
If the motor fails, it will cause no assist. Did the motor come with the used rack?
I also attached a wiring diagram as well.
Images (click to enlarge)
Saturday, December 29th, 2012 AT 8:38 PM