STEP 1. Voltage measurement at +B1 connector (+B1 line)
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the power supply mode of the engine switch from "ON" to "OFF."
(3) Measure the voltage between the +B connector (+B1 line) and the body ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 3. Go to Step 2.