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HOMESERVICE MANUALSTOYOTA2013SEQUOIA LIMITED, 5.7L ENG VIN WREPAIR AND DIAGNOSISTRANSMISSIONAUTOMATIC TRANSAUTOMATIC TRANSMISSION (AB60F) (DIAGNOSTIC CODES & CIRCUIT TESTS)AUTOMATIC TRANSMISSION SYSTEMCIRCUIT TESTSPATTERN SELECT SWITCH CIRCUITPROCEDURE
2013 Toyota Sequoia Limited, 5.7L Eng VIN W

Pattern Select Switch Circuit: Procedure

2013 Toyota Sequoia Limited, 5.7L Eng VIN WSECTION Procedure
  1. INSPECT TOW/HAUL PATTERN SELECT SWITCH ASSEMBLY 
    1. Remove the tow/haul pattern select switch.
      Fig 1: Identifying Tow/Haul Pattern Select Switch Connector Terminals
      GTY244325Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      1 - 4 Tow/haul pattern select switch ON Below 1 Ω
      Tow/haul pattern select switch OFF 10 kΩ or higher

    NG → REPLACE TOW/HAUL PATTERN SELECT SWITCH ASSEMBLY 

    OK: Go to next step 

  2. CHECK HARNESS AND CONNECTOR (TOW/HAUL PATTERN SELECT SWITCH - BODY GROUND) 
    1. Disconnect the H30 tow/haul pattern select switch connector.
      Fig 2: Identifying H30 Connector Terminals
      GTY244326Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      H30-1 - Body ground Always Below 1 Ω

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK: Go to next step 

  3. CHECK HARNESS AND CONNECTOR (TOW/HAUL PATTERN SELECT SWITCH - ECM) 
    1. Disconnect the A27 ECM connector.
      Fig 3: Identifying A27 ECM Connector Terminals
      GTY227991Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A27-51 (PWR) - Body ground Tow/haul pattern select switch ON Below 1 Ω
      Tow/haul pattern select switch OFF 10 kΩ or higher

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   4 

  4. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE 
RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.