DTC P0615-14: Starter Relay Circuit Short to Ground or Open [03/2023 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- READ VALUE USING GTS (STARTER SW)
- Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.
Powertrain > Engine > Data List
Tester Display Starter SW OK
Condition GTS Display (Starter SW) Ignition switch ON OFF Engine started ON Result
Proceed to OK NG
Result:
OK
CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [11/2021 - ]
Result:
NG
See step 2
- Check the value displayed on the GTS when the ignition switch is turned to the ON and START positions.
- CHECK HARNESS AND CONNECTOR (ECM - ST NO. 1 RELAY)
- Disconnect the ECM connector.
- Disconnect the engine stop and start ECU connector.
- Disconnect the certification ECU (smart key ECU assembly) connector.
- Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A19-16 (STA) - 2 (ST NO. 1 relay) Always Below 1 Ω Result
Proceed to OK NG
Result:
OK
REPLACE ECM. Refer to REMOVAL [11/2021 - ]
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR