STEP 2. Using scan tool (M.U.T.-III), communicates with this system.
Check that the communication with scan tool (M.U.T.-III) is possible.note | If ETACS-ECU is not active, OSS-ECU cannot communicate with the scan tool (M.U.T.-III). |
(1) caution | To prevent damage to scan tool (M.U.T.-III), always turn the power supply mode of the engine switch to the OFF position before connecting or disconnecting scan tool (M.U.T.-III). |
Connect scan tool (M.U.T.-III). Refer to "How to connect scan tool (M.U.T.-III)
."
(2) Disconnect the negative battery terminal, and connect it again.
(3) After the negative terminal is connected, the OSS-ECU should communicate with the scan tool (M.U.T.-III) within approximately 30 seconds.
(4) Turn the power supply mode of the engine switch to OFF.
Is the check result normal?
Go to Step 3. Carry out the troubleshooting of "OSS-ECU power supply or ground circuit malfunction" (Refer to ).