LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2013 >> RX 350 Base, AWD >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Cruise Control Systems >> Dynamic Radar Cruise Control System (Diagnostic Codes & Circuit Tests) >> Dynamic Radar Cruise Control System >> Circuit Tests >> Cruise Control Switch Circuit >> Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cruise Control Switch Circuit: Procedure

  1. READ VALUE USING TECHSTREAM 
    1. Connect the Techstream to the DLC3.
    2. Turn the engine switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Powertrain / Radar Cruise / Data List.
    5. Check the Data List for proper functioning of the cruise control main switch.
      GTY256299Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 ON-OFF
      *2 CANCEL
      *3 -SET
      *4 +RES
      *5 MODE
      RADAR CRUISE

      Techstream Display Measurement Item/Range Normal Condition Diagnostic Note
      Main SW M-CPU Main switch signal (Main CPU) / ON or OFF ON: Main switch on
      OFF: Main switch off      		 -
      Cancel Switch CANCEL switch signal / ON or OFF ON: CANCEL switch on
      OFF: CANCEL switch off      		 -
      SET/COAST Switch -/SET switch signal / ON or OFF ON: -/SET switch on
      OFF: -/SET switch off      		 -
      RES/ACC Switch +/RES switch signal / ON or OFF ON: +/RES switch on
      OFF: +/RES switch off      		 -

      OK

      When the cruise control main switch is operated, the display changes as shown above.

    NG → See step   2 

    OK → See step   7 

  2. INSPECT CRUISE CONTROL MAIN SWITCH 
    1. Measure the resistance according to the value(s) in the table below.

      Remove the cruise control main switch. Refer to REMOVAL [03/2012 - ] .

      GTY353421Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Component without harness connected:
      (Cruise Control Main Switch)      		 *2 ON-OFF
      *3 CANCEL *4 -SET
      *5 +RES *6 MODE

      Standard Resistance

      Tester Connection Switch Condition Specified Condition
      A-1 (ECC) - A-2 (R/N) Main switch off 1 MΩ or higher
      A-1 (ECC) - A-3 (CCS) Main switch off 1 MΩ or higher
      A-1 (ECC) - A-3 (CCS) Main switch on Below 2.5 Ω
      A-1 (ECC) - A-2 (R/N) MODE Below 2.5 Ω
      A-1 (ECC) - A-3 (CCS) + RES 235 to 245 Ω
      A-1 (ECC) - A-3 (CCS) - SET 617 to 643 Ω
      A-1 (ECC) - A-3 (CCS) CANCEL 1509 to 1571 Ω
    2. Reinstall the cruise control main switch. Refer to INSTALLATION [03/2012 - ] .

    NG → See step   8 

    OK: Go to next step 

  3. CHECK CRUISE CONTROL SWITCH WIRE 
    1. Disconnect the cruise control switch wire connector from the spiral cable sub-assembly and cruise control main switch.
    2. Measure the resistance according to the value(s) in the table below.
      GTY410430Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard Resistance

      Tester Connection Condition Specified Condition
      A-1 (ECC) - z9-4 (ECC) Always Below 1 Ω
      A-2 (R/N) - z9-1 (R/N) Always Below 1 Ω
      A-3 (CCS) - z9-3 (CCS) Always Below 1 Ω
    3. Reconnect the cruise control switch wire connector.
      TEXT IN ILLUSTRATION

      *1 Cruise control switch wire
      (to Spiral Cable Sub-assembly)
      *2 Cruise control switch wire
      (to Cruise Control Main Switch)

    NG → REPAIR OR REPLACE CRUISE CONTROL SWITCH WIRE 

    OK: Go to next step 

  4. INSPECT SPIRAL CABLE SUB-ASSEMBLY 
    NOTE:

    The spiral cable sub-assembly is an important part of the SRS airbag system. Incorrect removal or installation of the spiral cable sub-assembly may cause airbag deployment. Be sure to read the procedures shown .

    HINT: 

    1. Remove the spiral cable sub-assembly. Refer to REMOVAL [03/2012 - 07/2012] .
    2. Measure the resistance according to the value(s) in the table below.
      GTY404423Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      TEXT IN ILLUSTRATION

      *1 Component without harness connected
      (Spiral Cable Sub-assembly)      		 - -

      Standard Resistance

      Tester Connection Condition Specified Condition
      z9-1 (R/N) - F98-8 (R/N) The spiral cable sub-assembly position is center Below 1 Ω
      The spiral cable sub-assembly position is 2.5 rotations to the left
      The spiral cable sub-assembly position is 2.5 rotations to the right
      z9-3 (CCS) - F98-1 (CCS) The spiral cable sub-assembly position is center Below 1 Ω
      The spiral cable sub-assembly position is 2.5 rotations to the left
      The spiral cable sub-assembly position is 2.5 rotations to the right
      z9-4 (ECC) - F98-2 (ECC) The spiral cable sub-assembly position is center Below 1 Ω
      The spiral cable sub-assembly position is 2.5 rotations to the left
      The spiral cable sub-assembly position is 2.5 rotations to the right

      HINT: 

      The spiral cable sub-assembly makes a maximum of approximately 5 rotations.

    3. Install the spiral cable sub-assembly. Refer to INSTALLATION [03/2012 - 07/2012] .

    NG → See step   9 

    OK: Go to next step 

  5. CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - ECM, BODY GROUND) 
    1. Disconnect the ECM connectors.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      F98-1 (CCS) - A43-45 (CCS) Always Below 1 Ω
      F98-8 (R/N) - A43-37 (CCHG) Always Below 1 Ω
      F98-1 (CCS) - Body ground Always 10 kΩ or higher
      F98-8 (R/N) - Body ground Always 10 kΩ or higher
      F98-2 (ECC) - Body ground Always Below 1 Ω
    3. Reconnect the ECM connector.

    NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

    OK → See step   6 

  6. REPLACE ECM. Refer to  REMOVAL [03/2012 - 07/2012] 
  7. PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE. Refer to  PROBLEM SYMPTOMS TABLE [03/2012 - 07/2012] 
  8. REPLACE CRUISE CONTROL MAIN SWITCH. Refer to  REMOVAL [03/2012 - ] 
  9. REPLACE SPIRAL CABLE SUB-ASSEMBLY. Refer to  REMOVAL [03/2012 - 07/2012] 
scientia non olet · About LEMON Manuals