DTC P2530-14: Ignition Switch Circuit Short to Ground or Open [11/2016 - ]: Procedure

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Stop and Start / Data List / IG Switch.

   Powertrain > Stop and Start > Data List 

   Tester Display
   IG Switch

5. According to the display on the Techstream, read the Data List.

   Techstream Display	Result	Proceed to
   IG Switch	ON	A
   	OFF	B

Result: 

A 

USE SIMULATION METHOD TO CHECK.  Refer to HOW TO PROCEED WITH TROUBLESHOOTING [11/2016 - ] .

Result: 

B 

Go to next step 

1. Disconnect the engine stop and start ECU connector.
2. Remove the semiconductor PWR integration ECU from the No. 1 engine room relay block and No. 1 junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   F123-18 (IG2) - 1F-4	Always	Below 1 Ω
   F123-18 (IG2) or 1F-4 - Body ground and other terminals	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

Go to next step 

1. Inspect the IG2 relay.

   Refer to INSPECTION [12/2013 - ]

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SEMICONDUCTOR PWR INTEGRATION ECU.  Refer to REMOVAL [12/2013 - ] .

Result: 

OK 

Go to next step 

1. Remove the semiconductor PWR integration ECU from the No. 1 engine room relay block and No. 1 junction block assembly.

   Refer to REMOVAL [12/2013 - ]

2. Disconnect the certification ECU (smart key ECU assembly) connector. (w/ Smart Key System)
3. Disconnect the ignition or starter switch assembly connector. (w/o Smart Key System)
4. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   W/ SMART KEY SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   1E-1 - F10-3 (IG1D)	Always	Below 1 Ω
   1E-1 or F10-3 (IG1D) - Body ground and other terminals	Always	10 kΩ or higher

   W/O SMART KEY SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   1E-1 - F50-3 (IG2)	Always	Below 1 Ω
   1E-1 or F50-3 (IG2) - Body ground and other terminals	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

Go to next step 

1. Disconnect the engine stop and start ECU connector.
2. Remove the semiconductor PWR integration ECU from the No. 1 engine room relay block and No. 1 junction block assembly.

   Refer to REMOVAL [12/2013 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   A92-1 (+B) - 1G-8	Always	Below 1 Ω
   A92-1 (+B) or 1G-8 - Body ground and other terminals	Always	10 kΩ or higher

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

Go to next step 

1. Disconnect the ECM connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to ECM)

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   A43-4 (IGSW) - Body ground	Ignition switch ON	11 to 14 V

   Proceed to
   OK
   NG

Result: 

NG 

GO TO ECM POWER SOURCE CIRCUIT.  Refer to ECM Power Source Circuit [11/2016 - ] .

Result: 

OK 

Go to next step 

1. Inspect the EFI MAIN relay.

   Refer to INSPECTION [12/2013 - ]

   Proceed to
   OK
   NG

Result: 

NG 

REPLACE SEMICONDUCTOR PWR INTEGRATION ECU.  Refer to REMOVAL [12/2013 - ] .

Result: 

OK 

Go to next step 

HINT: 

If communication between the Techstream and vehicle is possible and SFI system data can be read 30 seconds after turning the ignition switch off a malfunction in the EFI MAIN relay circuit is suspected.

1. Remove the semiconductor PWR integration ECU from the No. 1 engine room relay block and No. 1 junction block assembly.

   Refer to REMOVAL [12/2013 - ]

2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1G-6 - A43-46 (MREL)	Always	Below 1 Ω
   1G-6 or A43-46 (MREL) - Body ground and other terminals	Always	10 kΩ or higher

   Result	Proceed to
   OK (w/ Smart Key System)	A
   OK (w/o Smart Key System)	B
   NG	C

Result: 

B 

See step  10

Result: 

C 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

A 

Go to next step 

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   F10-3 (IG1D) - Body ground	Engine switch on (ACC)	Below 1 V
   	Engine switch on (IG)	9 V or higher

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU.  Refer to REMOVAL [11/2016 - ] .

Result: 

NG 

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY).  Refer to REMOVAL [12/2013 - ] .

1. Inspect the ignition or starter switch assembly.

   Refer to INSPECTION [11/2016 - ]

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ENGINE STOP AND START ECU.  Refer to REMOVAL [11/2016 - ] .

Result: 

NG 

REPLACE IGNITION OR STARTER SWITCH ASSEMBLY.  Refer to REMOVAL [11/2016 - ] .