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P1315 Toyota Code - Igniter Circuit Malfunction No. 4

- Code Popularity: 108,058 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 3/3
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What are the Possible Causes of the DTC P1315 Toyota?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Faulty Ignition Coil No. 4
  • Ignition Coil No. 4 harness is open or shorted
  • Ignition Coil No. 4 circuit poor electrical connection
  • Faulty Engine Control Module (ECM)
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How to Fix the DTC P1315 Toyota?

Review the 'Possible Causes' mentioned above and visually examine the corresponding wiring harness and connectors. Ensure to check for any damaged components and inspect the connector pins for signs of being broken, bent, pushed out, or corroded.

Code Tech Notes





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What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1315 Toyota code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.

When is the Code Detected?

The P1315 code is for the ignition coil No.4 and is set when there is no IGF signal to the ECM during engine operation.

What are Code Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

Code P1315 Toyota Description

Direct Ignition System (DIS) is a 1-cylinder ignition system that ignites one cylinder with one ignition coil. Ignitor is integral to ignition coil. The Engine Control Module (ECM) determines ignition timing and outputs a ignition signal (IGT) for each cylinder. Based on the IGT signals, power transistors in the ignitor cut of current to primary coil in ignition coil, causing ignition coil to fire spark plug. After delivering a command to turn off primary circuit on the IGT wire, ECM monitors IGF circuit to ensure primary switching occurred.

OBDII Code P1315 Toyota - Igniter Circuit Malfunction No. 4 - AutoCodes.com
P1315 Toyota Code - Igniter Circuit Malfunction No. 4

Need More Information on the Code?

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Information for Specific Toyota Models

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Code P1315 Toyota comments

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