how do I know if my Honda Accord 10th Generation (2018-2022) alternator is bad?

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, socket set, torque wrench.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Remove the Alternator

1. Access the alternator by removing any components obstructing it, such as the engine cover or air intake duct.
2. Disconnect the wiring harness from the alternator by releasing the locking tabs and gently pulling the connector away.
3. Remove the alternator belt by loosening the tensioner pulley using a socket wrench and sliding the belt off the alternator pulley.
4. Unbolt the alternator from its mounting bracket using the appropriate socket size. Note the torque specifications for reinstallation.

3. Inspect and Replace

1. Inspect the alternator for physical damage, burnt smell, or excessive wear.
2. If replacement is necessary, install the new alternator by reversing the removal steps.
   • Align it properly in the bracket and hand-tighten the mounting bolts.
   • Torque the bolts to the manufacturer's specifications.
3. Reconnect the wiring harness to the new alternator ensuring a secure fit.

4. Reassemble and Test

1. Reinstall the alternator belt, ensuring it is routed correctly around all pulleys.
2. Reconnect the negative battery terminal.
3. Start the engine and use the multimeter to check the voltage output from the alternator.