STEP 1. Check the power supply fuses (fuse No. BF3).
STEP 2. Check of short to power supply, short to ground, and open circuit in IODI line between fusible link and ETACS-ECU connector.
Is the check result normal?
Go to Step 3 : Repair the connector(s) or wiring harness.
STEP 3. Using scan tool (M.U.T.-IIISE), read the OSS DTC.
(1) caution | To prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE). |
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect the Scan Tool (M.U.T.-IIISE)
."
(2) Check that the OSS-ECU set a DTC.
Is the DTC set?
Diagnose the OSS-ECU. Refer to GROUP 42B, Troubleshooting . Go to Step 4
STEP 4. Check of short to power supply, short to ground, and open circuit in ACC line between OSS-ECU (ACC) and ETACS-ECU connector.
STEP 5. Recheck for DTC.
Check again if the DTC is set in the ETACS-ECU.(1) Erase the DTC.
(2) Press the electric motor switch to turn the power supply mode from "OFF" to "ON."
(3) Check if DTC.
Is the DTC set?
Replace the ETACS-ECU. If the trouble symptom is resolved, an intermittent malfunction such as poorly engaged connector(s) or wiring harness is suspected. (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunction .)