CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

The cruise control switch is used to turn the 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 switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after it is released. The internal contact points of the cruise control switch turn on with switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control the SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL functions.

CAUTION / NOTICE / HINT

PROCEDURE

1. Click here

   READ VALUE ON GTS

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the engine switch on (IG).

   3. Turn the GTS on.

   4. Enter the following menus: Powertrain / Cruise Control / Data List.

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

      
      
      1. Powertrain > Cruise Control > Data List

         Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
         Main SW M-CPU	Cruise control switch signal (Main CPU)	ON or OFF	ON: Cruise control switch (ON/OFF button) pushed OFF: Cruise control switch (ON/OFF button) released	-
         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	-

      2. 
         
         10. 
             
         11. 
             
         12. 
             
         13. 
             
      
      
      1. Powertrain > Cruise Control > Data List

         Tester Display
         Main SW M-CPU
         Cancel Switch
         SET/COAST Switch
         RES/ACC Switch

      2. 
         
         1. 
            
      3. 
         
         10. 
             
         11. 
             
         12. 
             
         13. 
             

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

      Result
      Proceed to OK NG

   
   
   • OK

     PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLEClick here

   • NGClick here
2. Click here

   INSPECT CRUISE CONTROL SWITCH

   
   

   1. Remove the cruise control switch.

      Click here

   2. Inspect the cruise control switch.

      Click here

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE CRUISE CONTROL SWITCHClick here

3. Click here

   CHECK CRUISE CONTROL SWITCH WIRE

   
   
   1. 

      *a	Front view of wire harness connector (to Spiral with Sensor Cable Sub-assembly)
      *b	Front view of wire harness connector (to Cruise Control Switch)

      Remove the cruise control switch wire.

      Click here

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

      Standard Resistance
      Tester Connection Condition Specified Condition z5-3 (CCS) - B3-3 (CCS) Always Below 1 Ω z5-4 (ECC) - B3-1 (ECC) Always Below 1 Ω z5-3 (CCS) or B3-3 (CCS) - Body ground Always 10 kΩ or higher z5-4 (ECC) or B3-1 (ECC) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE CRUISE CONTROL SWITCH WIREClick here

4. Click here

   INSPECT SPIRAL WITH SENSOR CABLE SUB-ASSEMBLY

   
   

   1. Remove the spiral with sensor cable sub-assembly.

      Click here

   2. Inspect the spiral with sensor cable sub-assembly.

      Click here

      Result
      Proceed to OK NG

   
   
   • OKClick here
   • NG

     REPLACE SPIRAL WITH SENSOR CABLE SUB-ASSEMBLYClick here

5. Click here

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

   
   

   1. Disconnect the O25 spiral with sensor cable sub-assembly connector.

   2. Disconnect the A78 ECM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition O25-1 (CCS) - A78-16 (CCS) Always Below 1 Ω O25-2 (ECC) - Body ground Always Below 1 Ω O25-1 (CCS) or A78-16 (CCS) - Body ground Always 10 kΩ or higher

      Result
      Proceed to OK NG

   
   
   • OK

     REPLACE ECMClick here

   • NG

     REPAIR OR REPLACE HARNESS OR CONNECTOR