Code No.P186F: High side 3 system (Voltage low range out)



caution
  • If there is any problem in the CAN bus lines, an incorrect diagnosis code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
  • Whenever the ECU is replaced, ensure that the CAN bus lines are normal.

OPERATION




DIAGNOSIS CODE SET CONDITIONS




PROBABLE CAUSES



  • Malfunction of TC-SST-ECU

DIAGNOSIS PROCEDURE


STEP 1. M.U.T.-III CAN bus diagnostics.


Use M.U.T.-III to perform the CAN bus diagnosis.

Q. Is the check result normal?

Go to Step 2.
Repair the CAN bus lines. (Refer to GROUP 54C - Troubleshooting .) After repairing the CAN bus line, go to Step 2.

STEP 2. Check whether the diagnosis code is reset.


Q. Is diagnosis code No.P186F set?

Replace the TC-SST assembly. (Refer to .)
Intermittent malfunction. (Refer to GROUP 00 - How to Cope with Intermittent Malfunction .)