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Inspection [09/2014 - 11/2017]: Procedure

  1. INSPECT STEERING PAD SWITCH ASSEMBLY 
    1. Measure the resistance according to the value(s) in the table below.
      GTY502289Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *A w/ Variable Gear Ratio Steering System *B w/ Dynamic Radar Cruise Control System
      *C w/ Lane Departure Alert System - -
      *a Component without harness connected
      (Steering Pad Switch Assembly)      		 *b Seek+
      *c Seek- *d Volume+
      *e Volume- *f MODE
      *g Off hook *h On hook
      *i Voice *j Up
      *k Down *l Left
      *m Right *n Enter
      *o Back *p Distance Control
      *q Top *r Lane Departure Alert Main

      Standard Resistance

      Tester Connection Condition Specified Condition
      z4-11 (AU1) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      SEEK+ switch pushed Below 2.5 Ω
      SEEK- switch pushed 313 to 345 Ω
      Volume+ switch pushed 950 to 1050 Ω
      Volume- switch pushed 2955 to 3265 Ω
      z4-10 (AU2) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      MODE switch pushed Below 2.5 Ω
      On hook switch pushed 313 to 345 Ω
      Off hook switch pushed 950 to 1050 Ω
      Voice switch pushed 2955 to 3265 Ω
      z4-3 (+DP2) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      Left switch pushed Below 2.5 Ω
      Up switch pushed 313 to 345 Ω
      Down switch pushed 950 to 1050 Ω
      Right switch pushed 2955 to 3265 Ω
      z4-2 (+DP) - z4-8 (EAU) No switch pushed 95 to 105 kΩ
      Enter switch pushed Below 2.5 Ω
      Top switch pushed 313 to 345 Ω
      Back switch pushed 950 to 1050 Ω
      z4-4 (DIST) - z4-7 (ECC) No switch pushed 1 MΩ or higher
      Distance control switch pushed*1 Below 2.5 Ω
      Lane departure alert main switch pushed*2 228 to 252 Ω
      z4-1 (HO) - A-1 (HO) Always Below 2.5 Ω
      z4-6 (SUP) - z6-1 (SUP) Always Below 2.5 Ω
      z4-7 (ECC) - z6-3 (ECC) Always Below 2.5 Ω
      z4-9 (GND1) - B-1 (VGRS)*3 Always Below 2.5 Ω
      z4-12 (SDN) - z6-2 (SDN) Always Below 2.5 Ω
      1. *1: w/ Dynamic Radar Cruise Control System
      2. *2: w/ Lane Departure Alert System
      3. *3: w/ Variable Gear Ratio Steering System

      HINT: 

      If the result is not as specified, replace the steering pad switch assembly.

    2. Check the illumination.
      GTY506796Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      *a Component without harness connected
      (Steering Pad Switch Assembly)      		 - -
      1. Connect a positive (+) lead from the battery to terminal 5 (IL+2) and a negative (-) lead to terminal 8 (EAU) of the steering pad switch assembly connector.
      2. Check that the switch illumination comes on.

        OK

        Steering pad switch illumination comes on.

        HINT: 

        If the result is not as specified, replace the steering pad switch assembly.

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