Past trouble

WARNING: This page is about a different car, the 2008 Mitsubishi Lancer. However, it is still accessible from the selected car via links, so may be relevant.

When DTC No. C1020 is also set, perform the diagnosis with a particular emphasis on the wiring harness and connector failures between ASC-ECU and the wheel speed sensor. For diagnosis procedures, refer to How to Treat Past Trouble ( HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS ).
When DTC No. C1020 is not set simultaneously, the followings can be suspected.
- Wheel(s) spinning
- Unstable vehicle attitude (spin)
- External noise interference
- Vehicle ran with the parking brake applied.
- Only two wheels are rotated on a drum tester.