STEP 1. Check of short to power supply, short to ground or open circuit in STO line between KOS&OSS-ECU connector and ETACS-ECU connector
STEP 2. Check of short to power supply, short to ground or open circuit in ST line between ETACS-ECU connector and ECM connector
STEP 3. Using scan tool (M.U.T.-IIISE), check the other system data list
STEP 4. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.(1) Turn the power supply mode of the engine switch from "OFF" to "ON."
(2) On completion, check that the DTC is not set, after 10 seconds or more have elapsed since the engine switch "ON."
Is the DTC set?
Replace the ECM and register the chassis number and key codes [Refer to GROUP 00 - How to Perform VIN Writing ], and go to Step 6. : Go to Step 5.
STEP 5. Check whether the DTC is set again.
STEP 6. Check whether the DTC is set again.
Check again if the DTC is set in the KOS&OSS-ECU.(1) Erase the DTC.
(2) Turn the power supply mode of the engine switch from "OFF" to "ON."
(3) On completion, check that the DTC is not set again.
Is the DTC set?
Replace the KOS&OSS-ECU and register the ID codes (Refer to ). Intermittent malfunction is suspected (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction ).