DTC P0615-15: Starter Relay Circuit Short to Battery or Open [10/2022 - ]: Procedure

1. Read the values displayed on the GTS when the ignition switch is ON and START.

   Powertrain > Stop and Start > Data List 

   Tester Display
   Starter

   OK

   Tester Display	Condition	Normal Condition
   Starter	Ignition switch ON	OFF
   	Ignition switch START	ON

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  6

Result: 

OK 

See step  2

1. Check if the stop and start system operates.

   Refer to OPERATION CHECK [12/2019 - ]

   Result

   Result	Proceed to
   OPERATES	A
   DOES NOT OPERATE	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

B 

See step  3

1. Clear the DTC.

   Powertrain > Stop and Start > Clear DTCs 

   Result

   Proceed to
   NEXT

2. Turn the ignition switch off and wait for 30 seconds or more.

Result: 

NEXT 

See step  4

1. Check if the stop and start system operates.

   HINT: 

   Refer to OPERATION CHECK [12/2019 - ]

   Result

   Result	Proceed to
   OPERATES	A
   DOES NOT OPERATE	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ] 

Result: 

B 

See step  5

1. Read the DTCs.

   Powertrain > Stop and Start > Clear DTCs 

   Result

   Proceed to
   DTCs are not output	A
   P0615-15 is output	B

Result: 

A 

END 

Result: 

B 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

1. Disconnect the engine stop and start ECU connector.
2. Disconnect the park/neutral position switch assembly connector.
3. Disconnect the ECM connector.
4. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
5. Disconnect the certification ECU (smart key ECU assembly) connector.
6. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A83-16 (STA) - ST relay terminal 2	Always	Below 1 Ω
   A34-21 (STA) - A83-16 (STA)	Always	Below 1 Ω
   A83-16 (STA) - Body ground	Always	10 kΩ or higher
   A34-21 (STA) - Body ground	Always	10 kΩ or higher
   ST relay terminal 2 - Body ground	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  7

1. Inspect the ST relay.

   Refer to ON-VEHICLE INSPECTION [10/2022 - ]

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE RELAY (ST RELAY) 

Result: 

OK 

See step  8

1. Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   ST relay terminal 1 - Body ground	Always	Below 1 Ω

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [10/2022 - 11/2023]  , or refer to  REMOVAL [11/2023 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR