DTC P2530-14: Ignition Switch Circuit Short to Ground or Open [11/2021 - 03/2023]: Procedure

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

   Powertrain > Stop and Start > Data List 

   Tester Display
   IG Switch

   Result

   Tester Display	Result	Proceed to
   IG Switch	ON	A
   	OFF	B

Result: 

A 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2021 - ] 

Result: 

B 

See step  2

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch to ON.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   D40-18 (IGP) - Body ground	Ignition switch ON	9.5 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

NG 

See step  5

Result: 

OK 

See step  3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Turn the ignition switch to ON.
2. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A29-1 (+B) - Body ground	Ignition switch ON	9.5 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU. Refer to  REMOVAL [11/2021 - ] 

Result: 

NG 

See step  4

1. Disconnect the engine stop and start ECU connector.
2. Remove the EFI-MAIN NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A29-1 (+B) - 5 (EFI-MAIN NO. 1 relay holder)	Always	Below 1 Ω
   A29-1 (+B) - Body ground and other terminals	Always	10 kΩ or higher
   5 (EFI-MAIN NO. 1 relay holder) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO ECM POWER SOURCE CIRCUIT 

for A25A-FKS: Refer to ECM Power Source Circuit [11/2021 - ]

for T24A-FTS: Refer to ECM Power Source Circuit [11/2021 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

1. Disconnect the engine stop and start ECU connector.
2. Remove the IGP NO. 1 relay from the No. 1 engine room relay block and No. 1 junction block assembly
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D40-18 (IGP) - 3 (IGP NO. 1 relay holder)	Always	Below 1 Ω
   D40-18 (IGP) - Body ground and other terminals	Always	10 kΩ or higher
   3 (IGP NO. 1 relay holder) - Body ground and other terminals	Always	10 kΩ or higher

   Result

   Proceed to
   OK
   NG

Result: 

OK 

GO TO SMART ACCESS SYSTEM. Refer to  Power Source Mode does not Change to ON (IG) [11/2021 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR