Transmission Mode Switch: Testing and Inspection

SNOW MODE SWITCH

Description

The snow mode switch signal is sent to the "unified meter and A/C amp." from the snow mode switch. The
"unified meter and A/C amp." then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode is activated, the vehicle speed will not accelerator as quickly as normal to avoid vehicle slip. In other words, ECM controls rapid engine torque change by controlling the electric throttle control actuator operating speed.


Component Function Check


1. CHECK SNOW MODE SWITCH FUNCTION

With CONSULT
1.Turn ignition switch ON.
2.Select "SNOW MODE SW" in "DATA MONITOR" mode with CONSULT.
3.Check "SNOW MODE SW" indication as per the following conditions.





Is the inspection result normal?
YES- GO TO 2.
NO- Proceed to .

2. CHECK SNOW MODE INDICATOR FUNCTION

1.Turn ignition switch ON.
2.Check the snow mode indicator in the snow mode switch as per the following condition.





Is the inspection result normal?
YES- INSPECTION END
NO- Proceed to .


Diagnosis Procedure


1. CHECK SNOW MODE SWITCH OVERALL FUNCTION

Confirm the malfunctioning circuit (snow mode switch or snow mode indicator). .
Which circuit is related to the incident?
Snow mode switch-GO TO 2.
Snow mode indicator-GO TO 6.

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

CONSULT Function.
Is the inspection result normal?
YES- GO TO 3.
NO- Proceed to Work Flow.

3. CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect snow mode switch harness connector. Removal And Installation.
3.Turn ignition switch ON.
4.Check the voltage between snow mode switch harness connector and ground.





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, 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.





4.Also check harness for short to ground and short to power.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair open circuit, short to ground or short to power in harness or connector.

6. 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 7.
NO- Repair or replace ground connection.

7. CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT

1.Check the continuity between snow mode switch harness connector and ground.





2.Also check harness for short to power.
Is the inspection result normal?
YES- GO TO 8.
NO- Repair open circuit or short to power in harness or connectors.

8. CHECK SNOW MODE SWITCH

.
Is the inspection result normal?
YES- GO TO 9.
NO- Replace snow mode switch.

9. CHECK INTERMITTENT INCIDENT

Perform Intermittent Incident.
- INSPECTION END


Component Inspection


1. CHECK SNOW MODE SWITCH

1.Turn ignition switch OFF.
2.Disconnect snow mode switch harness connector. Removal And Installation.
3.Check the continuity between snow mode switch terminals as per the following conditions.





Is the inspection result normal?
YES- INSPECTION END
NO- Replace snow mode switch. Removal And Installation.