DYNAMIC RADAR CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch is used to turn the dynamic radar cruise control system on and off, as well as operate 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP and CANCEL. The SET, TAP-DOWN and - (COAST) functions, and the RES (RESUME), TAP-UP and + (ACCEL) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. The internal contact points of the cruise control main switch turn on with switch operation. Then the hybrid vehicle control ECU assembly reads the voltage value that has been changed by the switch operation to control the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.

PROCEDURE

1. Click here

   READ VALUE USING GTS (CANCEL SWITCH, -SET SWITCH, +RES SWITCH, CRUISE READY MAIN-CPU, CRUISE READY SUB-CPU)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Radar Cruise1 / Data List.

   5. Read the Data List according to the display on the GTS.

      Table 1. Radar Cruise1

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Cancel Switch	CANCEL switch status / ON or OFF	ON: CANCEL switch on OFF: CANCEL switch off	-
      -SET Switch	-/SET switch status / ON or OFF	ON: -/SET switch on OFF: -/SET switch off	-
      +RES Switch	+/RES switch status / ON or OFF	ON: +/RES switch on OFF: +/RES switch off	-
      Cruise Ready Main-CPU	Dynamic radar cruise control system standby condition / ON or OFF	Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes	-
      Cruise Ready Sub-CPU	Dynamic radar cruise control system standby condition / ON or OFF	Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes	-

      OK
      The Data List items shown in the table change according to the operation of the cruise control main switch.

   6. Turn the power switch off.

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE (Click here)

   • NGClick here
2. Click here

   INSPECT CRUISE CONTROL MAIN SWITCH

   
   

   1. Remove the cruise control main switch (Click here).

   2. Inspect the cruise control main switch (Click here).

   3. Reinstall the cruise control main switch (Click here).

   
   
   • OKClick here
   • NG

     REPLACE CRUISE CONTROL MAIN SWITCH (Click here)

3. Click here

   INSPECT STEERING PAD SWITCH ASSEMBLY

   
   

   1. Remove the steering pad switch assembly (Click here).

   2. Inspect the steering pad switch assembly (Click here).

   3. Reinstall the steering pad switch assembly (Click here).

   
   
   • OKClick here
   • NG

     REPLACE STEERING PAD SWITCH ASSEMBLY (Click here)

4. Click here

   INSPECT SPIRAL CABLE SUB-ASSEMBLY

   
   

   1. Remove the spiral cable sub-assembly (Click here).

   2. Inspect the spiral cable sub-assembly (Click here).

   3. Reinstall the spiral cable sub-assembly (Click here).

   
   
   • OKClick here
   • NG

     REPLACE SPIRAL CABLE SUB-ASSEMBLY (Click here)

5. Click here

   CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - HYBRID VEHICLE CONTROL ECU ASSEMBLY AND BODY GROUND)

   
   

   1. Disconnect the H211 hybrid vehicle control ECU assembly connector.

   2. Disconnect the H22 spiral cable sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition H211-28 (CCS) - H22-7 (CCS) Always Below 1 Ω

      Standard Resistance (Check for Short)
      Tester Connection Condition Specified Condition H211-28 (CCS) or H22-7 (CCS) - Body ground Always 10 kΩ or higher

   4. Reconnect the H22 spiral cable sub-assembly connector.

   5. Reconnect the H211 hybrid vehicle control ECU assembly connector.

   
   
   • OKClick here
   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR

6. Click here

   CHECK HARNESS AND CONNECTOR (SPIRAL CABLE SUB-ASSEMBLY - BODY GROUND)

   
   

   1. Disconnect the H22 spiral cable sub-assembly connector.

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

      Standard Resistance (Check for Open)
      Tester Connection Condition Specified Condition H22-2 (ECC) - Body ground Always Below 1 Ω

   3. Reconnect the H22 spiral cable sub-assembly connector.

   
   
   • OK

     REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY (Click here)

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR