Cruise Control Switch Circuit: Wiring Diagram

1. Disconnect the cruise control main switch connector.
2. Measure the resistance according to the value(s) in the table below.
   Fig 2: Inspecting Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Switch condition	Tester connection	Resistance (Ω)
   Neutral	1 - 3	Infinity (No continuity)
   +/ RES	1 - 3	210 to 270
   -/ SET	1 - 3	560 to 700
   CANCEL	1 - 3	1,380 to 1,700
   Main Switch OFF	1 - 3	10 kΩ or higher
   Main Switch ON	1 - 3	1 Ω or less

NG : REPLACE CRUISE CONTROL MAIN SWITCH 

OK : Go to next step 

1. Disconnect the main switch side connector and spiral cable side connector.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specification
   Main switch side 1 - Spiral cable side 3	Always	1 Ω or less
   Main switch side 3 - Spiral cable side 4	Always	1 Ω or less

   Fig 3: Identifying Main Switch And Spiral Cable Side Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specification
   Main switch side 1 - Body ground	Always	10 kΩ or higher
   Main switch side 3 - Body ground	Always	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : Go to next step 

1. Disconnect the spiral cable connector.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Tester Connection	Specification
   Switch side 3 to ECM side 1	1 Ω or less
   Switch side 4 to ECM side 2	1 Ω or less

   Fig 4: Inspecting Spiral Cable Sub-Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE SPIRAL CABLE SUB-ASSEMBLY 

OK : Go to next step 

1. Disconnect the spiral cable connector and ECM connector.
2. Measure the resistance according to the value(s) in the table below.

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specification
   Spiral cable 1 - CCS (E6 - 24)	Always	1 Ω or less

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

   Resistance 

   TESTER CONNECTION - RESISTANCE TABLE
   
   

   Tester Connection	Condition	Specification
   CCS (E6 - 24) - Body ground	Always	10 kΩ or higher
   Spiral cable 2 - Body ground	Always	10 kΩ or higher

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK : Go to next step 

1. Remove the ECM with connector.
2. Turn the ignition switch to the ON position.
3. Measure the voltage according to the value(s) in the table below.

Fig 5: Identifying ECM Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Voltage 

NG : REPLACE ECM 

OK : PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE