Pattern Select Switch Circuit: Procedure

HINT: 

ECUs that are correctly connected to the CAN communication system can be displayed on the Techstream.

1. Connect the Techstream to the DLC3.
2. Turn the ignition switch to ON.
3. Enter the following menus: System Select / CAN Bus Check.

   Result

   Result	Proceed to
   All of the ECUs and sensors that are currently connected to the CAN communication system are displayed.	A
   None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed (w/ Smart Key System).	B
   None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed (w/o Smart Key System).	C

B → See step   6 

C → See step   9 

A: Go to next step 

1. Check for DTCs of all systems by following the prompts on the Techstream screen.

   Result

   Result	Proceed to
   No DTCs are output.	A
   DTCs other than hybrid control system DTCs are output.	B

B → GO TO DTC CHART 

A: Go to next step 

1. Enter the following menus: Body Electrical / Combination Meter / Active Test / Indicat. ECO.
2. Check the condition of the pattern select indicator light (ECON mode light) by operating the Techstream.
   OK:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Indicat. ECO	Pattern select indicator light (ECON mode light)	ON or OFF	-

   Result

   Result	Proceed to
   The ECON mode light comes on.	A
   The ECON mode light does not come on.	B

B → See step   7 

A: Go to next step 

1. Turn the ignition switch off.
2. Disconnect the pattern select switch assembly (ECON mode switch) connector.
3. Measure the resistance according to the value(s) in the table below.
   Fig 1: Checking Pattern Select Switch Assembly (ECON Mode Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   9 (2ND) - 6 (E)	ECON mode switch on	Below 1 Ω
   9 (2ND) - 6 (E)	ECON mode switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Component without harness connected (Pattern Select Switch Assembly (ECON Mode Switch))

NG → REPLACE PATTERN SELECT SWITCH ASSEMBLY (ECON MODE SWITCH) 

OK: Go to next step 

1. Connect the pattern select switch assembly connector.
2. Disconnect connector D73 from the hybrid vehicle control ECU.
3. Measure the resistance according to the value(s) in the table below.
   Fig 2: Checking Harness And Connector (Hybrid Vehicle Control ECU - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard Resistance

   Tester Connection	Switch Condition	Specified Condition
   D73-27 (ECO) - Body ground	ECON mode switch on	Below 1 Ω
   D73-27 (ECO) - Body ground	ECON mode switch off	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a	Rear view of wire harness connector (to Hybrid Vehicle Control ECU)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   8