DTC B1508-19: Turn Signal/Hazard Flasher Circuit Current Above Threshold [11/2022 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2025 Toyota GR Corolla, 2025 Toyota Corolla, 2024 Toyota GR Corolla, 2024 Toyota Corolla, and 2023 Toyota GR Corolla. However, it is still accessible from the selected car via links, so may be relevant.

This DTC is stored when the combination meter assembly detects a short in a turn signal light circuit.

HINT:

If there is a short in a turn signal light circuit, the turn signal lights on the side with the short circuit will blink faster than usual.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	DTC Output from	Priority
B1508-19	Turn Signal/Hazard Flasher Circuit Current Above Threshold	Diagnosis Condition: Auxiliary battery voltage is 10 V or more Malfunction Status: Short in turn signal light circuit	Headlight assembly Rear Combination Light Assembly Outer rear view mirror assembly Side turn signal light assembly Harness or connector Combination meter assembly	Combination Meter	A

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

DTC Output from

Priority

B1508-19

Turn Signal/Hazard Flasher Circuit Current Above Threshold

Diagnosis Condition:

Auxiliary battery voltage is 10 V or more

Malfunction Status:

Short in turn signal light circuit

Headlight assembly
Rear Combination Light Assembly
Outer rear view mirror assembly
Side turn signal light assembly
Harness or connector
Combination meter assembly

Combination Meter