my Volvo XC90 won't start and only clicks, what does that mean?

Solution

1. Preparation

• Gather tools and parts required.
• Ensure the vehicle is in park (automatic) or neutral (manual).
• Disconnect the negative battery cable to prevent electrical shock.

2. Battery Inspection

• Sub-steps:
  1. Reconnect the battery and check voltage again.
  2. Clean battery terminals with a wire brush if corrosion is present.
  3. Tighten any loose connections.
• Tools Required: Multimeter, wire brush.

3. Starter Motor Testing

• Sub-steps:
  1. Locate the starter motor under the vehicle.
  2. Use jumper cables to connect the battery directly to the starter motor terminals.
  3. If the starter engages and the engine cranks, the starter is faulty.
• Tools Required: Jumper cables, socket set.

4. Replace Faulty Components

• Sub-steps:
  1. If the starter motor is confirmed faulty, remove it by unscrewing the mounting bolts.
  2. Disconnect the electrical connectors from the starter.
  3. Install the new starter motor by reversing the removal steps.
  4. Torque the mounting bolts to manufacturer specifications (consult service manual).
• Tools Required: Socket set, torque wrench.

5. Reconnect Battery and Test

• Sub-steps:
  1. Reconnect the negative battery cable.
  2. Attempt to start the engine.
• Safety Warnings: Ensure all tools are removed from the engine bay before starting.