Inspection Procedure

1. Start the engine.
2. Turn the ECT SNOW switch "OFF" (Normal drive mode).
3. Confirm vehicle response by driving from a parked position to fully depressing the accelerator pedal.
4. Turn the ECT SNOW switch "ON" and perform the same check as (c). Confirm that there is a difference between ECT SNOW switch "ON" and "OFF".

   HINT:

• Driving test should be done on a paved road (a nonskid road).
• Make sure not to use the TRAC system when testing a vehicle equipped with one.

OK: There is a difference in acceleration between "ON" and "OFF". 

1. NG: Go to step 2 
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  ) 

1. Disconnect the connector of pattern select switch (ECT SNOW switch).
2. Measure the resistance according to the value (s) in the table below.

   Standard: 

   SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   4 - Body ground	Below 1Ω

   Fig 1: Checking Harness And Connector (Pattern Select Switch Assy No. 1 - Body Ground)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
2. OK: GO TO NEXT STEP. 

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

   Standard: 

   Fig 2: Tester Specification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPLACE PATTERN SELECT SWITCH ASSY NO. 1 
2. OK: GO TO NEXT STEP. 
   Fig 3: Inspecting Pattern Select Switch Assy No. 1

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect the connector of pattern select switch (ECT SNOW switch).
2. Disconnect the multiplex network body ECU connector.
3. Measure the resistance between terminals SNOW of multiplex network body ECU and body ground.

   Standard: 

   Fig 4: Tester Specification

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   Fig 5: Harness And Connector (Pattern Select Switch Assy No. 1 - Multiplex Network Body ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (See  PROBLEM SYMPTOMS TABLE  )