HYBRID CONTROL SYSTEM Pattern Select Switch Snow Mode Circuit

DESCRIPTION

When the SNOW mode switch (combination switch assembly) is operated, a SNOW mode control signal is sent to the ECM to control the driving force to improve drivability according to operation of the accelerator pedal when road conditions are slippery, etc.

WIRING DIAGRAM

PROCEDURE

1. READ VALUE USING GTS (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. B

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter the following menus: System Select / CAN Bus Check.

      
      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. B

   4. Turn the power switch off.

   
   

   B

   GO TO CAN COMMUNICATION SYSTEM Click here

   A

2. CHECK DTC OUTPUT (HEALTH CHECK)

   Result
   Proceed to No DTCs are output. DTCs are output.

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter the following menus: System Select / Health Check.

   4. Check for DTCs.

      Result
      Proceed to No DTCs are output. DTCs are output.

   5. Turn the power switch off.

   
   

   DTCs are output.

   GO TO DTC CHART

   No DTCs are output.

3. READ VALUE USING GTS (SNOW MODE)

   
   

   1. Connect the GTS to the DLC3.

   2. Turn the power switch on (IG).

   3. Enter the following menus: Powertrain / Hybrid Control / Data List / Snow Mode.

      
      Powertrain > Hybrid Control > Data List

      Tester Display
      Snow Mode

   4. Read the value displayed on the GTS.

      
      Powertrain > Hybrid Control > Data List

      Tester Display	Measurement Item	Range	Normal Condition
      Snow Mode	Snow mode switch signal	ON or OFF	SNOW mode switch (combination switch assembly) being pushed and held: ON

      Result
      Result Proceed to The GTS display changes according to the SNOW mode switch (combination switch assembly) operation. A The GTS display does not change according to the SNOW mode switch (combination switch assembly) operation. B

   5. Turn the power switch off.

   
   

   A

   CHECK FOR INTERMITTENT PROBLEMS Click here

   B

4. INSPECT SNOW MODE SWITCH (COMBINATION SWITCH ASSEMBLY)

   
   

   1. Remove the SNOW mode switch (combination switch assembly).

      Click here

   2. 

      *a	Component without harness connected (SNOW Mode Switch (Combination Switch Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition 3 (SNSW) - 16 (E) SNOW mode switch (combination switch assembly) being pushed and held Below 50 Ω SNOW mode switch (combination switch assembly) not pushed 10 kΩ or higher

   3. Install the SNOW mode switch (combination switch assembly).

      Result
      Proceed to OK NG

   
   

   NG

   REPLACE SNOW MODE SWITCH (COMBINATION SWITCH ASSEMBLY) Click here

   OK

5. CHECK HARNESS AND CONNECTOR (EV DRIVE MODE SWITCH (COMBINATION SWITCH ASSEMBLY) - BODY GROUND)

   
   

   1. Disconnect the O78 SNOW mode switch (combination switch assembly) connector.

   2. 

      *a	Front view of wire harness connector (to SNOW Mode Switch (Combination Switch Assembly))

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

      Standard Resistance
      Tester Connection Condition Specified Condition O78-16 (E) - Body ground Always Below 1 Ω

   3. Reconnect the O78 SNOW mode switch (combination switch assembly) connector.

      Result
      Proceed to OK NG

   
   

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR

   OK

6. CHECK HARNESS AND CONNECTOR (ECM - SNOW MODE SWITCH (COMBINATION SWITCH ASSEMBLY))

   
   

   1. Disconnect the O78 SNOW mode switch (combination switch assembly) connector.

   2. Disconnect the A72 ECM connector.

   3. 

      *a	Front view of wire harness connector (to SNOW Mode Switch (Combination Switch Assembly))
      *b	Front view of wire harness connector (to ECM)

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

      Standard Resistance
      Tester Connection Condition Specified Condition A72-43 (SNWI) - O78-3 (SNSW) Always Below 1 Ω A72-43 (SNWI) or O78-3 (SNSW) - Body ground Always 10 kΩ or higher

   4. Reconnect the A72 ECM connector.

   5. Reconnect the O78 SNOW mode switch (combination switch assembly) connector.

      Result
      Proceed to OK NG

   
   

   OK

   REPLACE ECM Click here

   NG

   REPAIR OR REPLACE HARNESS OR CONNECTOR