Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Diagnosis Procedure
- CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
- Turn ignition switch ON.
- Select "SNOW MODE SW" in "DATA MONITOR" mode with CONSULT-III.
- Check "SNOW MODE SW" indication under the following conditions.
INDICATION CONDITION CHARTCONDITION INDICATION Snow mode switch: ON ON Snow mode switch: OFF OFF OK or NG
OK: GO TO 2.
NG: GO TO 3.
- CHECK SNOW MODE SWITICH OVERALL FUNCTION-II
- Turn ignition switch ON.
- Start engine.
- Check the snow mode indicator in the snow mode switch under the following condition.
INDICATION CONDITION CHARTCONDITION INDICATION Snow mode switch: ON ON Snow mode switch: OFF OFF OK or NG
OK: INSPECTION END
NG: GO TO 7.
- CHECK DTC WITH "UNIFIED METER AND A/C AMP."
Refer to "CONSULT-III FUNCTION (METER/M&A) ".
OK or NG
OK: GO TO 4.
NG: Follow the instructions of "CONSULT-III FUNCTION (METER/M&A) ".
- CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
- Turn ignition switch OFF.
- Disconnect snow mode switch harness connector.
- Turn ignition switch ON.
- Check voltage between snow mode switch terminal 1 and ground with CONSULT-III or tester.
Voltage: Battery voltage .
OK or NG
OK: GO TO 6.
NG: GO TO 5.
- DETECT MALFUNCTIONING PART
Courtesy of NISSAN MOTOR CO., U.S.A.
Check the following.
- Harness connectors E108, M15
- IPDM E/R harness connector E7
- 10 A fuse
- 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.
- CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
- Turn ignition switch OFF.
- Disconnect "unified meter and A/C amp." harness connector.
- Check harness continuity between snow mode switch terminal 4 and "unified meter and A/C amp." terminal 23. Refer to SYSTEM WIRING DIAGRAMS
article.
Continuity should exist .
- Also check harness for short to ground and short to power.
OK or NG
OK: GO TO 9.
NG: Repair open circuit or short to ground or short to power in harness or connectors.
- CHECK GROUND CONNECTIONS
- Turn ignition switch OFF.
- Loosen and retighten ground screws on the body.
Refer to "GROUND INSPECTION ".
OK or NG
OK: GO TO 8.
NG: Repair or replace ground connections.
- CHECK SNOW MODE INDICATOR LAMP GROUND CIRCUIT FOR OPEN AND SHORT
- Check harness continuity between snow mode switch terminal 2 and ground.
Refer to SYSTEM WIRING DIAGRAMS article.
Continuity should exist .
- Also check harness for short to power.
OK or NG
OK: GO TO 9.
NG: Repair open circuit or short to power in harness or connectors.
- Check harness continuity between snow mode switch terminal 2 and ground.
- CHECK SNOW MODE SWITCH
Refer to "COMPONENT INSPECTION ".
OK or NG
OK: GO TO 10.
NG: Replace snow mode switch.
- CHECK INTERMITTENT INCIDENT
Refer to "DIAGNOSIS PROCEDURE ".
INSPECTION END
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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