DTC P2533-14: Ignition Switch On/Start Position Circuit Low Circuit Short to Ground or Open [09/2022 - ]: Procedure

1. Read the Data List.

   Powertrain > Engine > Data List 

   Tester Display
   IGR

   Result

   Result	Proceed to
   The value of IGR is ON	A
   None of the above conditions are met	B

Result: 

A 

CHECK FOR INTERMITTENT PROBLEMS. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] 

Result: 

B 

See step  2

Pre-procedure1

• Disconnect the ECM connector.
• Turn the ignition switch to ON.

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

  Standard Voltage

  Tester Connection	Switch Condition	Specified Condition	Result
  A11-7 (IGR) - Body ground	Ignition switch ON	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

REPLACE ECM. Refer to  REMOVAL [09/2022 - ] 

Result: 

NG 

See step  3

Refer to ON-VEHICLE INSPECTION [09/2022 - ]

Result

Result: 

NG 

REPLACE IGR NO. 4 RELAY 

Result: 

OK 

See step  4

Pre-procedure1

• Remove the IGR NO. 4 relay from the No. 2 engine room relay block and junction block assembly.

  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

  *1	No. 2 Engine Room Relay Block and Junction Block Assembly
  *2	IGR NO. 4 Relay

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

  Standard Voltage

  Tester Connection	Condition	Specified Condition	Result
  5 (IGR NO. 4 relay) - Body ground	Always	11 to 14 V	V

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (AUXILIARY BATTERY - IGR NO. 4 RELAY) 

Result: 

OK 

See step  5

Pre-procedure1

• Remove the IGR NO. 4 relay from the No. 2 engine room relay block and junction block assembly.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  1 (IGR NO. 4 relay) - Body ground	Always	Below 1 Ω	Ω

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result: 

OK 

See step  6

Pre-procedure1

• Remove the IGR NO. 4 relay from the No. 2 engine room relay block and junction block assembly.
• Disconnect the ECM connector.

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

  Standard Resistance

  Tester Connection	Condition	Specified Condition	Result
  3 (IGR NO. 4 relay) - A11-7 (IGR)	Always	Below 1 Ω	Ω
  3 (IGR NO. 4 relay) or A11-7 (IGR) - Body ground and other terminals	Always	10 kΩ or higher	kΩ

  Result

  Proceed to
  OK
  NG

Post-procedure1

• None

Result: 

OK 

GO TO SMART KEY SYSTEM (FOR START FUNCTION). Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [09/2022 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR