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Inspection Procedure

DRIVING TEST
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.
    Standard:
    
    There is a difference in acceleration between "ON" and "OFF".
1. NG: Go to step 2
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN ON PROBLEM SYMPTOMS TABLE

CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSY NO.1 - BODY GROUND)

Disconnect the connector of pattern select switch (ECT SNOW switch).

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

Standard:

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection	Specified Condition
4 - Body ground	Below 1 Ω

Fig 1: Identifying Pattern Select Switch Connector Terminals

G03008916

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE )
OK: Go to next step.

INSPECT PATTERN SELECT SWITCH ASSY NO.1
1. Measure the resistance according to the value(s) in the table below.
  Standard:
  
  Fig 2: Resistance Check Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 3: Inspecting Pattern Select Switch Assy No.1
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE PATTERN SELECT SWITCH ASSY NO.1
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR (PATTERN SELECT SWITCH ASSY NO.1 - MULTIPLEX NETWORK BODY ECU)
1. Connect the connector of pattern select switch (ECT SNOW switch).
2. Disconnect the instrument panel junction block assy (multiplex network body ECU) connector.
3. Measure the resistance between terminals SNOW of Instrument panel junction block assy (multiplex network body ECU) and body ground.
  Standard:
  
  Fig 4: Tester Connection Specified Condition Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Fig 5: Identifying Multiplex Network Body ECU Connector Terminals
  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 ON PROBLEM SYMPTOMS TABLE