DTC B1508-19: Turn Signal/Hazard Flasher Circuit Current Above Threshold [08/2021 - ]: Description

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2024 Lexus ES 300h, 2023 Lexus ES 300h, 2022 Lexus ES 300h, 2021 Lexus ES 300h, and 2020 Lexus ES 300h. 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
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 Headlight ECU sub-assembly Headlight unit assembly1 Front turn signal light bulb2 Outer Mirror Control ECU Assembly*3 Outer rear view mirror assembly Outer mirror retractor Side turn signal light assembly Rear combination light assembly Hazard warning signal switch assembly Harness or connector Combination meter assembly

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

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
- Headlight ECU sub-assembly
- Headlight unit assembly*1
- Front turn signal light bulb*2
Outer Mirror Control ECU Assembly*3
Outer rear view mirror assembly
- Outer mirror retractor
- Side turn signal light assembly
Rear combination light assembly
Hazard warning signal switch assembly
Harness or connector
Combination meter assembly

*1: for LED Type Turn Signal Light
*2: for Bulb Type Turn Signal Light
*3: w/ Seat Position Memory