Electrical Supply Unit (ESU) Inspection: Notes
WARNING: This page is about a different car, the 2021 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
- Disconnect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
- Remove the Electrical supply unit (ESU) (See ELECTRICAL SUPPLY UNIT (ESU) REMOVAL/INSTALLATION .)
- Connect the Electrical supply unit (ESU) connector.
- Connect the negative battery terminal. (See NEGATIVE BATTERY TERMINAL DISCONNECTION/CONNECTION (US) .)
- Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference). (See TERMINAL VOLTAGE TABLE (REFERENCE) .)
- If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.
- If the system does not work normally even though the inspection items are normal, identify the malfunctioning location according to the directions in [DIAGNOSTIC SYSTEM] and [SYMPTOM TROUBLESHOOTING] then perform repairs.
- If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s) and related wiring harnesses.