CRUISE CONTROL SYSTEM Cruise Control Switch Circuit

DESCRIPTION

• The cruise control main switch outputs the signals of the power source for cruise control and the signals of the various operation switches to the ECM.

• The ECM performs cruise control in accordance with the signals from the cruise control main switch.

WIRING DIAGRAM

PROCEDURE

1. READ VALUE USING INTELLIGENT TESTER

   
   

   1. Use the Data List to check if the cruise control main switch is functioning properly Click here.

      Cruise Control

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Main SW M-CPU	Cruise control main switch (Main CPU) / ON or OFF	ON: Cruise control main switch on OFF: Cruise control 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
      On screen, each item changes between ON and OFF according to above chart.

   
   

   OK

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

   NG

2. INSPECT SPIRAL CABLE SUB-ASSEMBLY

   
   

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

   2. 

      If there are any defects as follows, replace the spiral cable with a new one: scratches, cracks, dents or chips on the connector or spiral cable.

   3. Check the spiral cable.

      
      

      1. Set the spiral cable to the center position Click here.

      2. Rotate the spiral cable 2.5 times clockwise and measure the resistance according to the value(s) in the table below. Then rotate the spiral cable 5 times counterclockwise and measure the resistance according to the value(s) in the table below.

         Note

         As the spiral cable may break, do not rotate the spiral cable more than the specified amount.

         Standard Resistance
         Tester Connection Condition Specified Condition 3 (CCS) - 1 (CCS) Always Below 1 Ω 4 (ECC) - 2 (ECC)

      3. Set the spiral cable to the center position and rotate the spiral cable 2.5 times clockwise. Then, while rotating the spiral cable 5 times counterclockwise, measure the resistance according to the value(s) in the table below.

         Standard Resistance
         Tester Connection Condition Specified Condition 3 (CCS) - 1 (CCS) Always Below 1 Ω 4 (ECC) - 2 (ECC)

   
   

   NG

   REPLACE SPIRAL CABLE SUB-ASSEMBLY Click here

   OK

3. INSPECT CRUISE CONTROL SWITCH WIRE

   
   

   1. 

      Disconnect the z7 spiral cable connector.

   2. Disconnect the A switch connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition z7-3 (CCS) - A-3 (CCS) Always Below 2.5 Ω z7-4 (ECC) - A-1 (ECC) z7-3 (CCS) - Body ground Always 1 MΩ or higher z7-4 (ECC) - Body ground

   
   

   NG

   REPLACE CRUISE CONTROL SWITCH WIRE

   OK

4. INSPECT CRUISE CONTROL MAIN SWITCH

   
   

   1. Remove the cruise control main switch Click here.

   2. Inspect the cruise control main switch Click here.

   
   

   NG

   REPLACE CRUISE CONTROL MAIN SWITCH Click here

   OK

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

   
   

   1. Disconnect the G40 spiral cable connector.

   2. Disconnect the G56*1, G57*2, G181*3 or G185*4 ECM connector.

      
      

      • *1: for 1GR-FE

      • *2: for 1KD-FTV

      • *3: for 2TR-FE

      • *4: for 1GD-FTV

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

      Standard Resistance
      for 1GR-FE, Automatic Transmission Tester Connection Condition Specified Condition G40-1 (CCS) - G56-1 (CCS) Always Below 1 Ω G40-2 (ECC) - Body ground G40-1 (CCS) - Body ground Always 10 kΩ or higher
      for 1GR-FE, Manual Transmission Tester Connection Condition Specified Condition G40-1 (CCS) - G56-11 (CCS) Always Below 1 Ω G40-2 (ECC) - Body ground G40-1 (CCS) - Body ground Always 10 kΩ or higher
      for 1KD-FTV Tester Connection Condition Specified Condition G40-1 (CCS) - G57-14 (CCS) Always Below 1 Ω G40-2 (ECC) - Body ground G40-1 (CCS) - Body ground Always 10 kΩ or higher
      for 2TR-FE Tester Connection Condition Specified Condition G40-1 (CCS) - G181-22 (CCS) Always Below 1 Ω G40-2 (ECC) - Body ground G40-1 (CCS) - Body ground Always 10 kΩ or higher
      for 1GD-FTV Tester Connection Condition Specified Condition G40-1 (CCS) - G185-26 (CCS) Always Below 1 Ω G40-2 (ECC) - Body ground G40-1 (CCS) - Body ground Always 10 kΩ or higher

      Result

      Result	Proceed to
      OK (for 1GR-FE)	A
      OK (for 2TR-FE)	B
      OK (for 1KD-FTV)	C
      OK (for 1GD-FTV)	D
      NG	E

   
   

   A

   REPLACE ECM Click here

   B

   REPLACE ECM Click here

   C

   REPLACE ECM Click here

   D

   REPLACE ECM Click here

   E

   REPAIR OR REPLACE HARNESS OR CONNECTOR