Diagnosis Procedure

1. CHECK SNOW MODE SWITCH OVERALL FUNCTION-I

   Confirm the malfunctioning circuit (snow mode switch or snow mode indicator). Refer to "COMPONENT FUNCTION CHECK ".

   Which circuit is related to the incident? 

   Snow mode switch: GO TO 2.

   Snow mode indicator: GO TO  7.

2. CHECK DTC WITH "UNIFIED METER AND A/C AMP."

   Refer to "CONSULT FUNCTION (METER/M&A) ".

   Is the inspection result normal? 

   YES: GO TO 3.

   NO: Go to "WORK FLOW ".

3. CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
   1. Turn ignition switch OFF.
   2. Disconnect snow mode switch harness connector.
   3. Turn ignition switch ON.
   4. Check the voltage between snow mode switch harness connector and ground.

      Snow mode switch		Ground	Voltage
      Connector	Terminal
      M139	1	Ground	Battery voltage

      Is the inspection result normal? 

      YES: GO TO  5.

      NO: GO TO 4.

4. DETECT MALFUNCTIONING PART

   Check the following.

   • Harness connectors E106, M6
   • IPDM E/R harness connector E7
   • 10 A fuse (No. 43)
   • Harness for open or short between snow mode switch and fuse

     Repair open circuit or short to ground or short to power in harness or connectors.

5. CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
   1. Turn ignition switch OFF.
   2. Disconnect "unified meter and A/C amp." harness connector.
   3. Check the continuity between snow mode switch harness connector and "unified meter and A/C amp." harness connector.

      Snow mode switch		Unified meter and A/C amp.		Continuity
      Connector	Terminal	Connector	Terminal
      M139	4	M66	23	Existed

   4. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  7.

      NO: GO TO 6.

6. DETECT MALFUNCTIONING PART

   Check the following.

   • Harness for open or short between snow mode switch and "unified meter and A/C amp."

     Repair open circuit or short to ground or short to power.

7. CHECK GROUND CONNECTION
   1. Turn ignition switch OFF.
   2. Check ground connection M95. Refer to Ground Inspection in "CIRCUIT INSPECTION ".

      Is the inspection result normal? 

      YES: GO TO 8.

      NO: Repair or replace ground connection.

8. CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
   1. Check the continuity between snow mode switch harness connector and ground.

      Snow mode switch		Ground	Continuity
      Connector	Terminal
      M139	2	Ground	Existed

   2. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO  10.

      NO: GO TO 9.

9. DETECT MALFUNCTIONING PART

   Check the following.

   • Harness for open or short between snow mode switch and ground

     Repair open circuit or short to power in harness or connectors.

10. CHECK SNOW MODE SWITCH

    Refer to "COMPONENT INSPECTION ".

    Is the inspection result normal? 

    YES: GO TO 11.

    NO: Replace snow mode switch. Refer to "A/T MODELS: EXPLODED VIEW ".

11. CHECK INTERMITTENT INCIDENT

    Refer to "INTERMITTENT INCIDENT ".

INSPECTION END