Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG).
3. Turn the Techstream on.
4. Enter the following menus: Powertrain / Radar Cruise / Data List.
5. Check the Data List for proper functioning of the cruise control main switch.
   Fig 1: Checking Functioning Of Cruise Control Main Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   ECM (Radar Cruise): 

   MEASUREMENT ITEM/RANGE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   CCS Main SW M-CPU	Main switch signal (Main CPU) / ON or OFF	ON: Main switch ON OFF: Main switch OFF	-
   Cancel Switch	CANCEL switch signal / ON or OFF	ON: CANCEL switch ON OFF: CANCEL switch OFF	-
   SET/COAST Switch	SET/COAST switch signal / ON or OFF	ON: - (COAST)/SET switch ON OFF: - (COAST)/SET switch OFF	-
   RES/ACC Switch	RES/ACC switch signal / ON or OFF	ON: + (ACCEL)/RES (RESUME) switch ON OFF: + (ACCEL)/RES (RESUME) switch OFF	-

   OK: 

   When the cruise control main switch operation is performed, the result will be same as above. 

   Result 

   RESULT REFERENCE
   
   

   Result	Proceed to
   OK	A
   NG (all Items are defective)	B
   NG (1 to 3 Items are defective)	C

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

C : REPLACE CRUISE CONTROL MAIN SWITCH 

B : Go to next step. 

1. Disconnect the cruise control main switch connector.
   Fig 2: Inspecting Cruise Control Main Switch

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

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   1 - 2, 1 - 3	Neutral	10 kΩ or higher
   1 - 3	RES/ACC	235 to 245 Ω
   1 - 3	SET/COAST	620 to 640 Ω
   1 - 3	CANCEL	1510 to 1570 Ω
   1 - 3	Main Switch OFF	10 kΩ or higher
   1 - 3	Main Switch ON	Below 1 Ω
   1 - 2	MODE	Below 1 Ω

NG : REPLACE CRUISE CONTROL MAIN SWITCH 

OK : Go to next step. 

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

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Condition	Specified Condition
   A-1 - K20-7	Below 1 Ω
   A-3 - K20-1	Below 1 Ω
   A-4 - K20-2	Below 1 Ω

NG : REPLACE SPIRAL CABLE 

Fig 3: Inspecting Spiral Cable

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to next step. 

1. Disconnect the A6 and A7 ECM connectors.
2. Measure the resistance according to the value (s) in the table below.

   Standard resistance (for 1UR-FSE) 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K20-1-A7-15 (CCS)	Always	Below 1 Ω
   K20-7-A6-17 (CCHG)	Always	Below 1 Ω
   K20-1 - Body ground	Always	10 kΩ or higher
   K20-7 - Body ground	Always	10 kΩ or higher

   Standard resistance (for 2GR-FSE) 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K20-1 -A7-31 (CCS)	Always	Below 1 Ω
   K20-7 - A6-20 (CCHG)	Always	Below 1 Ω
   K20-1 - Body ground	Always	10 kΩ or higher
   K20-7 - Body ground	Always	10 kΩ or higher

   HINT:

   • *1: for 1UR-FSE
   • *2: for 2GR-FSE

NG : REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

Fig 4: Checking Wire Harness (Spiral Cable - ECM)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

OK : Go to next step. 

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

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K20-2 - Body ground	Always	Below 1 Ω

NG : REPAIR OR REPLACE WIRE HARNESS AND CONNECTOR 

Fig 5: Checking Wire Harness (Spiral Cable - Body Ground)

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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