P1315 (blink 15) on Toyota Corolla E120: IGNITER CIRCUIT MALFUNCTION(No.4)

Short answer: P1315 means “IGNITER CIRCUIT MALFUNCTION(No.4)”. The car’s computer has found a fault in the EFI 1NZ-FE/2NZ-FE system and turns on the Malfunction indicator lamp (Check Engine). First check: workshop check order (RM821E): CHECK SPARK PLUG AND SPARK -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−IGNITION COIL) -> INSPECT ECU -> CHECK HARNESS AND CONNECTOR(IGNITION SWITCH−IGNITION COIL) (See.

Code

P1315 · blink 15

System

EFI 1NZ-FE/2NZ-FE

Dashboard light

Malfunction indicator lamp (Check Engine)

Applies to

2NZ-FE 1.3 (PK XLi/GLi NZE120) and 1NZ-FE 1.5 (JDM NZE121/NZE124 Corolla/Fielder/Runx)

Confidence

high (official Toyota RM821E)

Source

toyotamanuals.gitlab.io

Symptoms and when it is set

1. No IGF signal to engine ECU while engine is running

Likely causes

1. Open or short in IGF1 or IGF2 and IGT1 − 4 circuit from ignition coil with igniter; No.1 − No.4 ignition coil with igniter; Engine ECU

What to check, in order

1. Workshop check order (RM821E): CHECK SPARK PLUG AND SPARK -> CHECK HARNESS AND CONNECTOR(ENGINE ECU−IGNITION COIL) -> INSPECT ECU -> CHECK HARNESS AND CONNECTOR(IGNITION SWITCH−IGNITION COIL) (See

Related on this car

• Ignition coil-on-plug failure / misfire
• All fault codes for this car
• Warning lights
• Where the parts are (parts map)
• Common problems

← P1310/14 P1335/13 →

Clearing the code does not fix the fault. If it comes back, the problem is still there. For brakes, airbags and steering, see a trained mechanic.