Cruise Control Switch Circuit: Wiring Diagram

1. Choose the diagnosis method.
   DIAGNOSIS METHOD DESCRIPTION
   
   

   Method	Proceed to
   Using intelligent tester	A
   Not using intelligent tester	B

   B : Go to step 3 

   A : Go to next step 

1. Connect the intelligent tester to the DLC3.
2. Turn the ignition switch to the ON position.
3. According to the display on the tester, read the "DATA LIST".
   Fig 2: Turning Ignition Switch To ON Position

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ECM (Cruise Control) 

   CRUISE CONTROL DIAGNOSTIC CHART
   
   

   Item	Measurement Item / Display (Range)	Normal Condition	Diagnostic Note
   MAIN SW (MAIN)	Main SW signal (Main CPU) ON or OFF	ON: Main SW ON (Pushed on) OFF: Main SW OFF (Pushed off)	-
   MAIN SW (SUB)	Main SW signal (Sub CPU) ON or OFF	ON: Main SW ON (Pushed on) OFF: Main SW OFF (Pushed off)	-
   CANCEL SW	CANCEL SW signal ON or OFF	ON: CANCEL SW ON OFF: CANCEL SW OFF	-
   SET / COAST SW	SET/- SW signal ON or OFF	ON: SET/- SW ON OFF: SET/- SW OFF	-
   RES / ACC SW	RES/+ SW signal ON or OFF	ON: RES/+ SW ON OFF: RES/+ SW OFF	-

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

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   OK	A
   NG (All items are detective.)	B
   NG (One to four items are defective.)	C

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

C : REPLACE CRUISE CONTROL MAIN SWITCH ASSEMBLY 

B 

1. Disconnect the cruise control main switch connector.
   Fig 3: Inspecting Cruise Control Main Switch Assembly

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

   Standard resistance 

   RESISTANCE CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   4 - 5	Neutral	10 kΩor higher
   4 - 5	RES/+	210 to 270 Ω
   4 - 5	SET/-	560 to 700 Ω
   4 - 5	CANCEL	1,380 to 1,700 Ω
   4 - 5	Main switch OFF	10 kΩor higher
   4 - 5	Main switch ON	Below 1 Ω

NG : REPLACE CRUISE CONTROL MAIN SWITCH ASSEMBLY 

OK: GO TO NEXT STEP 

1. Disconnect the S7 spiral cable connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE CONDITION
   
   

   Tester Connection	Condition	Specified Condition
   A-4 - S7-4	Always	Below 1 Ω
   A-5 - S7-5	Always	Below 1 Ω

   Fig 4: Identifying Cruise Control Main Switch Connector Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG : REPLACE SPIRAL CABLE SUB-ASSEMBLY 

OK: GO TO NEXT STEP 

1. Disconnect the E5 connector from the ECM.
2. Measure the resistance according to the value(s) in the table below.

   Standard resistance 

   RESISTANCE CONDITION
   
   

   Tester Connection	Connection	Specified Condition
   S7-5 - E5-24 (CCS)	Always	Below 1 Ω
   E5-24 (CCS) - Body ground	Always	10 kΩor higher
   S7-4 - Body ground	Always	Below 1 Ω

   Fig 5: Disconnecting E5 Connector From ECM

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

OK: REPAIR OR REPLACE HARNESS AND CONNECTOR