Stop and Start Priority Control System [10/2022 - ]: Procedure

CHECK PROBLEM SYMPTOMS

Check the problem symptoms.

HINT:

Check each symptom by checking the suspected areas in the table below.
By using the GTS and entering the following menus, the selected mode can be confirmed.
Powertrain / Stop and Start / Data List / Stop & Start A/C Mode

Result

Problem Symptoms	Trouble Area	Proceed to
Multi-information display screen does not change after pressing steering pad switch assembly	Steering pad switch assembly Spiral cable sub-assembly Combination meter assembly Engine stop and start ECU Wire harness or connector (steering pad switch assembly - combination meter assembly, radio and display receiver assembly or radio receiver assembly) CAN communication system	A
When the stop and start system cancel switch (eco-run cancel switch assembly) is pressed and held, the status change interrupt display in the combination meter assembly is not displayed, and control does not change	Stop and start system cancel switch (eco-run cancel switch assembly) Engine stop and start ECU Wire harness or connector (stop and start system cancel switch (eco-run cancel switch assembly) - engine stop and start ECU)	B
Even though the stop and start system cancel switch (eco-run cancel switch assembly) and steering pad switch assembly are operated, the multi-information display screen does not change, and control does not change	Engine stop and start ECU CAN communication system	C
Multi-information display screen changes without pressing steering pad switch assembly	Steering pad switch assembly Spiral cable sub-assembly Wire harness or connector (steering pad switch assembly - combination meter assembly, radio and display receiver assembly or radio receiver assembly)	D
The status change interrupt display in the combination meter assembly is not displayed, but control changes	Combination meter assembly	E
The status change interrupt display in the combination meter assembly is displayed, but control does not change	Air conditioning amplifier assembly CAN communication system	F
Control mode returns to default mode after turning ignition switch ON	Engine stop and start ECU	G

Result:

GO TO STOP AND START CANCEL SWITCH CIRCUIT. Refer to Stop and Start Cancel Switch Circuit [10/2022 - ]

Result:

See step 3

Result:

See step 4

Result:

GO TO METER / GAUGE SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

Result:

See step 7

Result:

See step 8

Result:

See step 2

CHECK OPERATION

Using the steering pad switch assembly, check that all functions other than "Stop & Start Settings" can be selected.

Result

Result	Proceed to
Only "Stop & Start Settings" cannot be selected	A
No function can be selected using the steering pad switch assembly	B

Result:

See step 3

Result:

See step 4

CHECK DTC OUTPUT

Perform a road test.

Read the DTCs.

Powertrain > Stop and Start > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
CAN DTCs are output	B

Result:

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

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - COMBINATION METER ASSEMBLY OR RADIO AND DISPLAY RECEIVER ASSEMBLY)

Disconnect the spiral cable sub-assembly connector.
Disconnect the combination meter assembly connector.
Disconnect the radio and display receiver assembly connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
H24-11 (+DP) - H21-29 (MSTI)*1	Always	Below 1 Ω
H24-11 (+DP) - H113-12 (MSTI)*2	Always	Below 1 Ω
H24-10 (+DP2) - H21-28 (MSM+)*1	Always	Below 1 Ω
H24-10 (+DP2) - H113-29 (MSM+)*2	Always	Below 1 Ω
H24-4 (EAU) - H107-20 (SWG)	Always	Below 1 Ω
H24-11 (+DP) or H21-29 (MSTI)*1 - Body ground and other terminals	Always	10 kΩ or higher
H24-11 (+DP) or H113-12 (MSTI)*2 - Body ground and other terminals	Always	10 kΩ or higher
H24-10 (+DP2) or H21-28 (MSM+)*1 - Body ground and other terminals	Always	10 kΩ or higher
H24-10 (+DP2) or H113-29 (MSM+)*2 - Body ground and other terminals	Always	10 kΩ or higher
H24-4 (EAU) or H107-20 (SWG) - Body ground and other terminals	Always	10 kΩ or higher

*1: except 12.3 Inch Display
*2: for 12.3 Inch Display

Result

Proceed to
OK
NG

Result:

REPAIR OR REPLACE HARNESS OR CONNECTOR

Result:

See step 5

INSPECT SPIRAL CABLE SUB-ASSEMBLY
Refer to INSPECTION [12/2019 - ]

Result

Proceed to

OK

NG

Result:

NG

REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result:

OK

See step 6
INSPECT STEERING PAD SWITCH ASSEMBLY
Refer to INSPECTION [12/2019 - ]

Result

Proceed to

OK

NG

Result:

OK

GO TO METER / GAUGE SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [12/2019 - ]

Result:

NG

REPLACE STEERING PAD SWITCH ASSEMBLY. Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

CHECK DTC OUTPUT

Perform a road test.

Read the DTCs.

Powertrain > Stop and Start > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
CAN DTCs are output	B

Result:

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY. Refer to REMOVAL [10/2022 - 11/2023] , or refer to REMOVAL [11/2023 - ]

Result:

GO TO CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [10/2022 - 11/2023] , or refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2023 - ]

CHECK DTC OUTPUT

Perform a road test.

Read the DTCs.

Powertrain > Stop and Start > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

Result:

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

Result:

GO TO DIAGNOSTIC TROUBLE CODE CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART [10/2022 - 11/2023] , or refer to DIAGNOSTIC TROUBLE CODE CHART [11/2023 - ]