DTC P0615-12: Starter Relay Circuit Short to Battery [12/2019 - 10/2022]: Procedure

READ VALUE USING GTS (STARTER SW)

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List

Tester Display
Starter SW

Standard

Condition	Starter SW
Ignition switch ON	OFF

According to the display on the GTS, read the Data List while the vehicle is being driven with an engine speed of 1000 rpm or more at a vehicle speed of 20 km/h (12.43 mph) or more.

Powertrain > Engine > Data List

Tester Display
Vehicle Speed
Engine Speed
Starter SW

WARNING:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

Standard

Condition	Starter SW
Driving at 20 km/h (12.43 mph) or more (engine speed 1000 rpm or more)	OFF

HINT:

If the result of either of the above is not as specified, proceed to the next step with the ignition switch ON, GTS connected and Data List item "Starter SW" selected.

Result

Result	Proceed to
OK	A
NG (w/ Stop and Start System)	B
NG (w/o Stop and Start System)	C

HINT:

If the starter assembly operates continuously when the ignition switch is turned to ON, proceed to the next step without reading the Data List item "Starter SW".

Result:

CHECK FOR INTERMITTENT PROBLEMS. Refer to CHECK FOR INTERMITTENT PROBLEMS [12/2019 - 10/2022]

Result:

See step 8

Result:

See step 2

INSPECT ST RELAY (CHECK FOR SHORT CIRCUIT)

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List

Tester Display
Starter SW

Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.

Result

Result	Proceed to
The Data List item "Starter SW" does not change from ON	A
The Data List item "Starter SW" changes from ON to OFF	B

HINT:

When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST relay is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE ST RELAY

Result:

See step 3

CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

HINT:

The purpose of this step is to check for ST relay terminal voltage under abnormal conditions.

Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Turn the ignition switch to ON.

Measure the voltage between ST relay terminal 2 and body ground.

HINT:

Make a note of the measured voltage as it will be necessary for the inspecting the change in voltage in the next step. As the next step should be conducted under the same conditions, keep the ignition switch ON and do not install the ST relay.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.
If any voltage was measured with the ignition switch ON, one of the following malfunctions is suspected:
- Short to +B in the circuit of a connected ECU or the switch.
- Short to +B in the wire harness.

Result

Proceed to
NEXT

Result:

See step 4

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (CHECK FOR SHORT CIRCUIT)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

Disconnect the park/neutral position switch assembly connector.

Measure the voltage between ST relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

Result

Result	Proceed to
The voltage between ST relay terminal 2 and body ground does not change when the connector is disconnected.	A
The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected.	B

HINT:

If the voltage is the same before and after disconnecting the connector, the park/neutral position switch assembly is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

for 2WD models: Refer to REMOVAL [12/2019 - 10/2022]
for AWD models: Refer to REMOVAL [12/2019 - 10/2022]

Result:

See step 5

INSPECT ECM (CHECK FOR SHORT CIRCUIT)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

Disconnect the ECM connector.

Measure the voltage between ST relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

Result

Result	Proceed to
The voltage between ST relay terminal 2 and body ground does not change when the connector is disconnected.	A
The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected.	B

HINT:

If the voltage is the same before and after disconnecting the connector, the ECM is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE ECM. Refer to REMOVAL [12/2019 - 09/2020] , or refer to REMOVAL [09/2020 - 10/2022]

Result:

See step 6

INSPECT ENGINE STOP AND START ECU (CHECK FOR SHORT CIRCUIT)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

Disconnect the engine stop and start ECU connector.

Measure the voltage between ST relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

Result

Result	Proceed to
The voltage between ST relay terminal 2 and body ground does not change when the connector is disconnected.	A
The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected.	B

HINT:

If the voltage is the same before and after disconnecting the connector, the engine stop and start ECU is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE ENGINE STOP AND START ECU. Refer to REMOVAL [12/2019 - 10/2022]

Result:

See step 7

CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY - ENGINE STOP AND START ECU - ST RELAY)

Disconnect the ECM connector.
Disconnect the park/neutral position switch assembly connector.
Disconnect the certification ECU (smart key ECU assembly) connector.
Disconnect the engine stop and start ECU connector.
Remove the ST 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
A28-43 (STA), C52-9 (L), A34-21 (STA), A19-20 (STA) or 2 (ST relay) - Other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

CHECK SMART KEY SYSTEM (CHECK FOR STA TERMINAL VOLTAGE OF SMART KEY ECU ASSEMBLY). Refer to TERMINALS OF ECU [12/2019 - 10/2021] , or refer to TERMINALS OF ECU [10/2021 - 10/2022]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

INSPECT ST RELAY (CHECK FOR SHORT CIRCUIT)

According to the display on the GTS, read the Data List.

Powertrain > Engine > Data List

Tester Display
Starter SW

Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.

Result

Result	Proceed to
The Data List item "Starter SW" does not change from ON	A
The Data List item "Starter SW" changes from ON to OFF	B

HINT:

When the result of the above inspection is "The Data List item "Starter SW" does not change from ON", the ST relay is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE ST RELAY

Result:

See step 9

CHECK TERMINAL VOLTAGE (POWER SOURCE OF ST RELAY)

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

HINT:

The purpose of this step is to check for ST relay terminal voltage under abnormal conditions.

Remove the ST relay from the No. 1 engine room relay block and No. 1 junction block assembly.
Turn the ignition switch to ON.

Measure the voltage between ST relay terminal 2 and body ground.

HINT:

Make a note of the measured voltage as it will be necessary for the inspecting the change in voltage in the next step. As the next step should be conducted under the same conditions, keep the ignition switch ON and do not install the ST relay.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.
If any voltage was measured with the ignition switch ON, one of the following malfunctions is suspected:
- Short to +B in the circuit of a connected ECU or the switch.
- Short to +B in the wire harness.

Result

Proceed to
NEXT

Result:

See step 10

INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY (CHECK FOR SHORT CIRCUIT)

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

Disconnect the park/neutral position switch assembly connector.

Measure the voltage between ST relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

Result

Result	Proceed to
The voltage between ST relay terminal 2 and body ground does not change when the connector is disconnected.	A
The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected.	B

HINT:

If the voltage is the same before and after disconnecting the connector, the park/neutral position switch assembly is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

for 2WD models: Refer to REMOVAL [12/2019 - 10/2022]
for AWD models: Refer to REMOVAL [12/2019 - 10/2022]

Result:

See step 11

INSPECT ECM (CHECK FOR SHORT CIRCUIT)

*1	No. 1 Engine Room Relay Block and No. 1 Junction Block Assembly
*2	ST Relay

Disconnect the ECM connector.

Measure the voltage between ST relay terminal 2 and body ground and compare it to the voltage measured in the previous step.

Result

Result	Proceed to
The voltage between ST relay terminal 2 and body ground does not change when the connector is disconnected.	A
The voltage between ST relay terminal 2 and body ground changes when the connector is disconnected.	B

HINT:

If the voltage is the same before and after disconnecting the connector, the ECM is normal.
DTCs may be stored during this inspection. Check for DTCs and clear them using the GTS.

Result:

REPLACE ECM. Refer to REMOVAL [12/2019 - 09/2020] , or refer to REMOVAL [09/2020 - 10/2022]

Result:

See step 12

CHECK HARNESS AND CONNECTOR (ECM - PARK/NEUTRAL POSITION SWITCH ASSEMBLY - SMART KEY ECU ASSEMBLY - ST RELAY)

Disconnect the ECM connector.
Disconnect the park/neutral position switch assembly connector.
Disconnect the certification ECU (smart key ECU assembly) connector.
Remove the ST 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
A28-43 (STA), C52-9 (L), A19-20 (STA) or 2 (ST relay) - Other terminals	Always	10 kΩ or higher

Result

Proceed to
OK
NG

Result:

CHECK SMART KEY SYSTEM (CHECK FOR STA TERMINAL VOLTAGE OF SMART KEY ECU ASSEMBLY). Refer to TERMINALS OF ECU [12/2019 - 10/2021] , or refer to TERMINALS OF ECU [10/2021 - 10/2022]

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR