DTC P0617: Starter Relay Circuit High [11/2021 - ]: Description

WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.

While the engine is being cranked, battery voltage is applied to terminal STA of the TCM.

If the TCM detects the starter control (STA) signal while the vehicle is being driven, it determines that there is a malfunction in the STA circuit. The TCM then illuminates the MIL and stores this DTC.

This monitor runs when the vehicle is driven at 20 km/h (12.4 mph) or more for more than 20 seconds.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area	MIL	Memory
P0617	Starter Relay Circuit High	1. Diagnosis Condition 2. Malfunction Status 3. Malfunction Time 4. Other Positive (+B) battery voltage of 10.5 V or more applied to the TCM When conditions (a), (b) and (c) are met. Vehicle speed of 20 km/h (12.4 mph) or more Engine speed of more than 1000 rpm STA signal ON 20 seconds or more 1-trip detection logic	Park/neutral position switch assembly Starter relay circuit Cranking holding function circuit Harness and connector TCM	Comes on	DTC stored