Denso Direct Ignition Coil 673-1309 Instruction Manual

1. Introduction

The Denso Direct Ignition Coil 673-1309 is a high-quality replacement component for your vehicle's ignition system. Denso, a leader in direct ignition technology, developed the auto industry’s first compact stick-type ignition coil. This space-saving design eliminates the need for high-tension ignition cables, fitting neatly into the engine’s spark plug bore. Denso ignition coils are designed and optimized for specific applications, ensuring maximum performance and consistent, high-energy ignition output for effective combustion in modern low-emission, high-efficiency engines.

2. Product Compatibility

This Denso Direct Ignition Coil (part number 673-1309) is compatible with a range of Lexus, Toyota, and Scion vehicles. Please verify compatibility with your specific vehicle model and year before installation.

Compatible Vehicle Models and Years:

• Lexus: ES300h (2013-2018), ES350 (2007-2018), GS300 (2006), GS350 (2007-2011 & 2013-2015), GS450h (2007-2011 & 2013-2016), GX460 (2010-2023), IS250 (2006-2015), IS300 (2016), IS350 (2006-2016), LS460 (2007-2017), LS600h (2008-2016), LX570 (2008-2011 & 2013-2021), NX300h (2015-2021), RC300 (2016), RC350 (2015-2016), RX350 (2007-2015), RX450h (2010-2015)
• Toyota: 4Runner (2010-2023), Avalon (2005-2018), Camry (2007-2017), Corolla (2019), FJ Cruiser (2010-2014), Highlander (2008-2019), Land Cruiser (2008-2011 & 2013-2021), RAV4 (2006-2018), Sequoia (2008-2022), Sienna (2007-2016), Tundra (2007-2021), Venza (2009-2015)
• Scion: tC (2011-2016)

3. Product Features

• Efficient Fuel Consumption
• Optimized for specific vehicle applications
• Compact stick-type design
• No high-tension ignition cable required
• Incorporates advanced features like micro-sized driver circuits and diagonal inductive windings

4. What's in the Box

• Denso Direct Ignition Coil (Model 673-1309)

Note: Additional components like spark plugs may be required for a complete ignition system overhaul and are sold separately.

5. Specifications

6. Setup and Installation

Safety First: Always ensure the vehicle's engine is off and cool. Disconnect the negative terminal of the battery before beginning any work on the ignition system to prevent electrical shock or damage.

1. Locate the Ignition Coils: Refer to your vehicle's service manual to identify the location of the ignition coils. They are typically found directly above the spark plugs.
2. Access: Depending on your vehicle model, you may need to remove engine covers, air intake components, or even parts of the intake manifold to gain access to all ignition coils.
3. Disconnect Electrical Connector: Carefully disconnect the electrical connector from the ignition coil. Press any release tabs or clips before pulling.
4. Remove Retaining Bolt: Use an appropriate wrench (often 10mm) to remove the bolt securing the ignition coil to the engine.
5. Remove Old Coil: Gently pull the old ignition coil straight up and out of the spark plug well. It may require some twisting to break free from the spark plug.
6. Inspect Spark Plug (Optional but Recommended): While the coil is removed, it is an opportune time to inspect or replace the spark plug in that cylinder. Ensure the new spark plug is correctly gapped according to your vehicle's specifications.
7. Install New Coil: Insert the new Denso 673-1309 ignition coil into the spark plug well, ensuring it seats properly over the spark plug.
8. Secure Coil: Reinstall and tighten the retaining bolt. Do not overtighten.
9. Reconnect Electrical Connector: Reattach the electrical connector to the new ignition coil until it clicks securely into place.
10. Repeat for Other Coils: If replacing multiple coils, repeat steps 3-9 for each.
11. Reassemble: Reinstall any removed engine covers or components.
12. Reconnect Battery: Reconnect the negative terminal of the battery.
13. Test: Start the engine and check for proper operation. If a Check Engine Light was on, it may need to be cleared using an OBD-II scanner.

Professional Installation Recommended: Due to the complexity of some vehicle designs and the critical role of ignition components, professional installation is recommended if you are not experienced with automotive repairs.

7. Operating Principles

The direct ignition coil is a crucial component of your vehicle's ignition system. Its primary function is to transform the low voltage from the vehicle's battery into the high voltage required to create a spark across the spark plug gap. This spark ignites the air-fuel mixture in the engine's combustion chamber, driving the engine's operation. Each cylinder typically has its own dedicated direct ignition coil, ensuring precise timing and strong spark delivery for optimal engine performance and fuel efficiency.

8. Maintenance

Ignition coils are generally designed for long service life, but they can degrade over time due to heat, vibration, and electrical stress. Regular maintenance involves:

• Periodic Inspection: During routine engine checks, visually inspect ignition coils for any signs of cracking, discoloration, or corrosion on the housing or electrical connectors.
• Spark Plug Replacement: It is good practice to replace ignition coils when replacing spark plugs, especially if the vehicle has high mileage, as worn spark plugs can put additional strain on the coils.
• Address Misfires Promptly: If your vehicle experiences misfires, have the ignition system diagnosed promptly to prevent further damage to other engine components.

9. Troubleshooting

Common symptoms of a failing ignition coil include:

• Engine Misfires: The engine may run rough, especially during acceleration.
• Rough Idle: The engine may shake or vibrate excessively when idling.
• Reduced Engine Power: Noticeable loss of acceleration or overall power.
• Check Engine Light: The Malfunction Indicator Lamp (MIL) will illuminate on the dashboard.
• Diagnostic Trouble Codes (DTCs): An OBD-II scanner may reveal codes such as P030x (where 'x' is the cylinder number indicating a misfire) or P035x (indicating an ignition coil primary/secondary circuit malfunction, e.g., P0354 for cylinder 4).

If you experience any of these symptoms, it is recommended to have your vehicle diagnosed by a qualified technician. While replacing a faulty coil can be a DIY task for some, proper diagnosis is key to avoid replacing parts unnecessarily.

10. Product Images

11. Product Videos

12. Warranty Information

Specific warranty details for the Denso Direct Ignition Coil 673-1309 are typically provided by the manufacturer or the retailer at the time of purchase. Please retain your proof of purchase and refer to the warranty documentation included with your product or contact Denso customer service for detailed information regarding warranty coverage and claims.

13. Support

For technical assistance, installation guidance, or any questions regarding your Denso Direct Ignition Coil 673-1309, please contact Denso customer support or the authorized retailer from whom you purchased the product. Have your product model number and vehicle information ready to ensure efficient service.