Inspection Procedure

1. Connect the Techstream to the DLC3.
2. Turn the engine switch on (IG) and turn the Techstream main switch ON.
3. 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 (Cruise control): 

   MEASUREMENT ITEM/RANGE CHART
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Main SW M-CPU	Main switch signal (Main CPU) / ON or OFF	ON: Main switch ON (Pushed on) OFF: Main switch OFF (Pushed 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: SET / COAST switch ON OFF: SET / COAST switch OFF	-
   RES/ACC Switch	RES / ACC switch signal / ON or OFF	ON: RES / ACC switch ON OFF: RES / ACC switch OFF	-

   OK: 

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

   Result: 

   RESULT REFERENCE CHART
   
   

   Result	Proceed to
   OK	A
   N6 (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.
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

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Switch Condition	Specified Condition
   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	1,510 to 1,570 Ω
   1 - 3	Main Switch OFF	10 kΩ or higher
   1 - 3	Main Switch ON	Below 1 Ω

NG : REPLACE CRUISE CONTROL MAIN SWITCH 

OK : Go to next step. 

1. Disconnect the A and K20 spiral cable connectors.
2. Measure the resistance of the connectors.

   Standard resistance 

   STANDARD RESISTANCE
   
   

   Tester Connection	Specified Condition
   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 A7 ECM connectors.
2. Measure the resistance of the wire harness side connectors.

   Standard resistance (for 1UR-FSE) 

   STANDARD RESISTANCE
   
   

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

   Standard resistance (for 2GR-FSE) 

   STANDARD RESISTANCE
   
   

   Tester Connection	Condition	Specified Condition
   K20-1 - A54-31 (CCS)	Always	Below 1 Ω
   A54-31 (CCS) - Body ground	Always	10 kΩ or higher
   K20-1 - Body ground	Always	10 kΩ or higher

   HINT:

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

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR 

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

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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