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
STEP 3. Using scan tool (M.U.T.-III), read the OSS diagnostic trouble code
(1) caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III)
."
(2) Check that the OSS-ECU store a DTC.
Is the DTC stored?
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 ignition switch (ACC) <vehicles without one touch start system>or OSS-ECU (ACC) <vehicles with one touch start system> and ETACS-ECU connector
STEP 5. Recheck for diagnostic trouble code.
Check again if the DTC is stored in the ETACS-ECU.(1) Erase the DTC.
(2) Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3) Check if DTC.
Is the DTC stored?
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 .)