STEP 1. Using scan tool (M.U.T.-III), check data list (ETACS-ECU).
(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)
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."
(2) Check that the following service data display contents are normal. (Refer to GROUP 54A, ETACS-ECU Date list reference table
).Item No.252: Ambient air temperature Sensor
Is the check result normal?
Go to Step 5
.
Go to Step 2
.
STEP 2. Using scan tool (M.U.T.-III), diagnose the CAN bus line
STEP 3. Check of open circuit in AMB+ and AMB- line (ETACS-ECU) between ambient temperature sensor connector and ETACS-ECU connector.
STEP 4. Inspection of the ambient temperature sensor
STEP 5. Retest the system.