DTC P0615-19: Starter Relay Circuit Current Above Threshold [11/2016 - ]: Procedure
WARNING: This page is about a different car, the 2019 Toyota Highlander, 2018 Toyota Highlander, and 2017 Toyota Highlander. 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 AND BBC NO. 2 FUSE)
- Disconnect the engine stop and start ECU connector.
- Remove the BBC fuse and BBC NO. 2 fuse 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 A91-1 (BIN2) - BBC fuse terminal 2 Always Below 1 Ω A91-3 (BIN1) - BBC NO. 2 fuse terminal 2 Always Below 1 Ω A91-1 (BIN2) or BBC fuse terminal 2 - Body ground and other terminals Always 10 kΩ or higher A91-3 (BIN1) or BBC NO. 2 fuse terminal 2 - Body ground and other terminals Always 10 kΩ or higher Result
Proceed to OK NG
Result: 2
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - BBC FUSE OR BBC NO. 2 FUSE)
Result: 1
OK
See step 2
- CHECK HARNESS AND CONNECTOR (ENGINE STOP AND START ECU - ST RELAY AND ST NO. 2 RELAY)
- Disconnect the engine stop and start ECU connectors.
- Remove the ST relay and ST NO. 2 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
- Disconnect the certification ECU (smart key ECU assembly) connector. (w/ Smart Key System)
- Disconnect the park/neutral position switch 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 A92-21 (STA) - ST relay terminal 2 Always Below 1 Ω A92-23 (STA2) - ST NO. 2 relay terminal 2 Always Below 1 Ω A92-21 (STA) or ST relay terminal 2 - Body ground and other terminals Always 10 kΩ or higher A92-23 (STA2) or ST NO. 2 relay terminal 2 - Body ground and other terminals Always 10 kΩ or higher A91-1 (BIN2) - A92-21 (STA) Always 10 kΩ or higher A91-3 (BIN1) - A92-21 (STA) Always 10 kΩ or higher A91-1 (BIN2) - A92-23 (STA2) Always 10 kΩ or higher A91-3 (BIN1) - A92-23 (STA2) Always 10 kΩ or higher Result
Proceed to OK NG
Result: 2
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR (ENGINE STOP AND START ECU - ST RELAY OR ST NO. 2 RELAY)
Result: 1
OK
See step 3
- CHECK ENGINE STOP AND START ECU
*a Component without harness connected
(Engine Stop and Start ECU)- - - Disconnect the engine stop and start ECU connector.
- Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection Condition Specified Condition A92-21 (STA) - A92-6 (DGND) Always 10 kΩ or higher A92-23 (STA2) - A92-6 (DGND) Always 10 kΩ or higher Result
Proceed to OK NG
Result: 2
NG
REPLACE ENGINE STOP AND START ECU. Refer to REMOVAL [11/2016 - ]
Result: 1
OK
See step 4
- INSPECT RELAY (ST RELAY AND ST NO. 2 RELAY)
- Inspect the ST relay.
Refer to PROCEDURE - Step 1
- Inspect the ST NO. 2 relay.
Refer to PROCEDURE - Step 2
Result
Proceed to OK NG
Result: 1
OK
USE SIMULATION METHOD TO CHECK. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ]
Result: 2
NG
REPLACE RELAY (ST RELAY OR ST NO. 2 RELAY)
- Inspect the ST relay.