Pattern Select Switch Snow Mode Circuit: Procedure

HINT: 

The driving test should be performed on a paved road (nonskid road).

1. Start the engine.
2. Turn the 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 SNOW switch on and perform the same check as above.

   When driving the vehicle with the SNOW switch on and off, check that there is a difference in acceleration.

   OK

   There is a difference in acceleration.

NG → See step   2 

OK → See step   5 

1. Disconnect the connector of combination switch.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Specified Condition
   N59-4 (GND) - Body ground	Below 1 Ω

   TEXT IN ILLUSTRATION
   
   

   *1	Front view of wire harness connector (to Combination Switch Assembly)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   2 - 4	Press continuously combination switch (SNOW)	Below 10 Ω
   ↑	Release combination switch (SNOW)	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Component without harness connected (Combination Switch Assembly)

NG → See step   6 

OK: Go to next step 

1. Connect the connector of combination switch.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the ECM connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Switch Condition	Specified Condition
   A21-22 (SNWI) - Body ground	Press continuously combination switch (SNOW)	Below 10 Ω
   ↑	Release combination switch (SNOW)	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *1	Rear view of wire harness connector (to ECM)

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK → See step   5