LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2023 >> Sequoia TRD Pro >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine Control System - Service Information >> Relay >> On-Vehicle Inspection [09/2022 - ] >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

On-Vehicle Inspection [09/2022 - ]: Procedure

  1. INSPECT NO. 1 ELECTRONIC FUEL INJECTION MAIN RELAY (EFI MAIN NO. 1) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY776398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the No. 1 electronic fuel injection main relay (EFI MAIN NO. 1).

  2. INSPECT NO. 2 ELECTRONIC FUEL INJECTION MAIN RELAY (EFI MAIN NO. 2) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY447534Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the No. 2 electronic fuel injection main relay (EFI MAIN NO. 2).

  3. INSPECT NO. 3 ELECTRONIC FUEL INJECTION MAIN RELAY (EFI MAIN NO. 3) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the No. 3 electronic fuel injection main relay (EFI MAIN NO. 3).

  4. INSPECT ELECTRONIC DRIVER UNIT RELAY (EDU) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY776398Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the electronic driver unit relay (EDU).

  5. INSPECT AIR FUEL RATIO SENSOR HEATER RELAY (A/F) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the air fuel ratio sensor heater relay (A/F).

  6. INSPECT INJECTOR RELAY (IGN/INJ) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the injector relay (IGN/INJ).

  7. INSPECT IGP RELAY (IGP NO. 1) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the IGP relay (IGP NO. 1).

  8. INSPECT NO. 2 IGP RELAY (IGP NO. 2) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the No. 2 IGP relay (IGP NO. 2).

  9. INSPECT NO. 3 IGNITION RELAY (IGR NO. 3) 
    1. Measure the resistance according to the value(s) in the table below.
      GTY751946Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition Result
      3 - 5 Auxiliary battery voltage not applied between terminals 1 and 2 10 kΩ or higher kΩ
      3 - 5 Auxiliary battery voltage applied between terminals 1 and 2 Below 1 Ω Ω

      If the result is not as specified, replace the No. 3 ignition relay (IGR NO. 3).

scientia non olet · About LEMON Manuals