|
|
TROUBLESHOOTING ACTIVE STABILITY CONTROL SYSTEM (ASC) 35C-65 DIAGNOSIS CODE SET CONDITIONS • Missing wheel speed sensor signal • Wheel speed sensor signal continuously indi- cates low value. PROBABLE CAUSES Current trouble • Excessive gap between the wheel speed sensor and the wheel speed detection encoder • Adhesion of foreign materials on the wheel speed sensor • Wheel bearing malfunction • Deformation of the wheel speed detection encoder • Adhesion of foreign materials on the wheel speed detection encoder • Malfunction of wheel speed sensor • Improper installation of the wheel speed sensor • ASC-ECU malfunction • The number of poles on the Magnetic encoder for wheel speed detection (N-pole and S-pole) is Past trouble • When diagnosis code No.C102B is also set, carry out diagnosis with particular emphasis on wiring − How to Use Troubleshooting/How to Treat Past Trouble ). • When diagnosis code No.C102B is not set, the following conditions may be present: • Some wheels slip • Unstable vehicle attitude • External noise interference • Vehicle ran with the parking brake applied. • Rotate only two wheels with drum tester DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III CAN bus diagnosis Q: Is the check result normal? YES : Go to Step 3. NO : Repair the CAN bus lines (Refer to GROUP − CAN Bus Diagnostics Table ). On completion, go to Step 2. STEP 2. Diagnosis code recheck after resetting Q: Is the diagnosis code No.C1044 set? YES : Go to Step 3. NO : This diagnosis is complete. STEP 3. M.U.T.-III diagnosis code Q: Is the diagnosis code No. C102B also set? YES : Perform the diagnosis for the diagnosis code No. C102B (Refer to ). NO : Go to Step 4. STEP 4. Check for wheel speed sensor <RR> Q: Is the check result normal? YES : Go to Step 5. NO : Reinstall the wheel speed sensor <RR> ). Then go to Step 5. STEP 5. Check for wheel speed sensor <RR> Q: Is the check result normal? YES : Go to Step 6. NO : Replace the wheel speed sensor <RR> ). Then go to Step 9. STEP 6. Check for wheel bearing looseness . • Loose wheel bearing may increase the gap • Check the Rear wheel hub assembly <RR> − Wheel Bearing Axial Play Check ). Q: Is the check result normal? YES : Go to Step 7. NO : Replace the rear wheel hub assembly <RR> − Rear axle hub assembly ). Then go to Step 10. |