STEP 2. Voltage measurement at the TCU connector (IG terminal).
(1) Disconnect the TCU connector, and measure at the wiring harness side.
(2) Turn the ignition switch from OFF position to ON position.
(3) Check the voltage between the TCU connector (IG terminal) and body ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 3. Repair the connector(s) or wiring harness.