January 3, 2024

Acura TL 1999-2003 Stalling and Starting Issues

Acura TL battery, starting, stalling. DIY. As an owner of a 1999-2003 Acura TL, I’ve experienced a common issue with this car that was preventing starting, and I chose to try the DIY route. Annoying, especially when you’re in a hurry. I’ve found this is often caused by the ignition switch. In fact, some Acura models were even recalled for this issue. If these problems sound like your problems, like failure to start, engine stalling, or intermittent battery power, you’re in the right place.  I’ll walk through a step-by-step process to diagnose, test, and replace the ignition switch. I’ll also discuss relevant OBD codes. Let’s get started!

First let’s check for recalls for this issue.  Contact your Acura dealer with your VIN (Vehicle Identification Number) to confirm. If your car was recalled, the dealer might fix it for free.

Something else?  Rough idle, starting, stalling, engine light?  Transmission?

Troubleshooting Your Acura TL – DIY

First, confirm the symptoms. If your TL is failing to start, stalling unexpectedly, or showing signs of battery power issues, the ignition switch could be the reason. These symptoms can also be accompanied by the dashboard lights flickering or not turning on at all.

OBD Codes

Sometimes, the car’s computer (OBD system) may store codes related to the ignition system. Use an OBD scanner to check these. Common codes related to ignition issues include P0300 (Random/Multiple Cylinder Misfire Detected) and P0350 (Ignition Coil Primary/Secondary Circuit Malfunction).

You may also see these secondary issues, P0340, P0341, P0325, P0562, P1682, U0100, B2784.  You can find causes for each here.

Let’s Look Closer at Your Acura TL – DIY

To diagnose and replace the ignition switch, you’ll need a few tools:

  • Screwdrivers (Phillips and flathead)
  • Socket set
  • Multimeter
  • A wiring diagram for your specific Acura TL model

Disconnect the negative cable from your car’s battery. Locate the ignition switch, usually found on the steering column.

  1. Visual: Look for any obvious damage.
  2. Access the Ignition Switch:
    • The ignition switch is usually located on the steering column or behind the ignition lock cylinder.
    • Remove any covers or panels to access the switch. This may involve removing screws or panels under the steering column.
  3. Identify the Switch Connectors:
    • Use the wiring diagram for your Acura TL to identify the ignition switch connectors and the corresponding wires.
  4. Visible Damage:
    • Inspect the ignition switch and its connectors for any visible damage.
  5. Multimeter Tests.
    • Set the digital multimeter to the continuity setting (represented by the diode symbol or a sound wave symbol).
      • Insert the key into the ignition and turn it to the first position (ACC or accessory position).
      • Using the multimeter, test for continuity between the terminals as shown in the wiring diagram.
      • Repeat this test for each key position (ON, START) and check the wiring diagram to confirm each circuit is functioning as it should when the key is turned to these positions.
    • Voltage Testing (if above inconclusive):
      • Check for voltage at the switch’s terminals in each key position.
      • Connect the to the appropriate terminals, set it to the multimeter to voltage setting, and check readings as you turn the key.
    • Ensure that all connections to the ignition switch are secure and there are no loose wires or damaged terminals.
  6. Reassemble Everything
    • Once testing is complete, reassemble with either the original part, or a new one.
  7. Reconnect the Battery

Final Thoughts

Dealing with a stalling or non-starting Acura TL can be challenging, but with a systematic approach, you can often resolve these issues yourself. Remember, if you’re not confident in performing these tasks, it’s always best to seek professional help. Safe driving!

Keywords: stalling, TL, won’t start.