DTC P0615-11: Starter Relay Circuit Short to Ground [10/2022 - ]: Procedure
WARNING: This page is about a different car, the 2025 Lexus RX 350, 2024 Lexus RX 350, and 2023 Lexus RX 350. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - BBC FUSE)
Pre-procedure1
- Disconnect the engine stop and start ECU connector.
- Remove the BBC NO. 1 and BBC NO. 2 fuses 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 Result A24-1 (BIN2) - BBC NO. 2 fuse terminal 2 Always Below 1 Ω Ω A24-3 (BIN1) - BBC NO. 1 fuse terminal 2 Always Below 1 Ω Ω A24-1 (BIN2) - Body ground Always 10 kΩ or higher kΩ A24-3 (BIN1) - Body ground Always 10 kΩ or higher kΩ BBC NO. 1 fuse terminal 2 - Body ground Always 10 kΩ or higher kΩ BBC NO. 2 fuse terminal 2 - Body ground Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST NO. 1 RELAY)
Pre-procedure1
- Disconnect the engine stop and start ECU connectors.
- Remove the ST NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
- Remove the BBC NO. 1 and BBC NO. 2 fuses from the No. 1 engine room relay block and No. 1 junction block assembly.
- Disconnect the certification ECU (smart key ECU assembly) connector.
- Disconnect the ECM connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result A25-21 (STA) - ST NO. 1 relay terminal 2 Always Below 1 Ω Ω A25-21 (STA) - Body ground Always 10 kΩ or higher kΩ ST NO. 1 relay terminal 2 - Body ground Always 10 kΩ or higher kΩ A24-1 (BIN2) - A25-21 (STA) Always 10 kΩ or higher kΩ A24-3 (BIN1) - A25-21 (STA) Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
Result:
OK
See step 3
- CHECK ENGINE STOP AND START ECU
Pre-procedure1
- Disconnect the engine stop and start ECU connector.
*a Component without harness connected
(Engine Stop and Start ECU)- -
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition Result A25-21 (STA) - A25-6 (DGND) Always 10 kΩ or higher kΩ Result
Proceed to OK NG
Post-procedure1
- None.
Result:
NG
REPLACE ENGINE STOP AND START ECU. Refer to REMOVAL [10/2022 - ]
Result:
OK
See step 4
- Disconnect the engine stop and start ECU connector.
- INSPECT RELAY (ST NO. 1 RELAY)
- Inspect the ST NO. 1 relay.
Refer to ON-VEHICLE INSPECTION [10/2022 - ]
Result
Proceed to OK NG
Result:
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - ]
Result:
NG
REPLACE RELAY (ST NO. 1 RELAY)
- Inspect the ST NO. 1 relay.