Diagnostic Procedure

CHECK OVERALL FUNCTION-I

Turn ignition switch ON.
Select "SNOW MODE SW" in "DATA MONITOR" mode with CONSULT-II.

Check "SNOW MODE SW" indication under the following conditions.

CONDITION INDICATION

CONDITION	INDICATION
Snow mode switch: ON	ON
Snow mode switch: OFF	OFF

Fig 1: CONSULT-II Display - DATA MONITOR

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 2.
NG: GO TO 3.

CHECK OVERALL FUNCTION-II

Turn ignition switch ON.
Check snow indicator in the snow mode switch under the following conditions.

CONDITION INDICATION

CONDITION	INDICATOR
Snow mode switch: ON	Illuminated
Snow mode switch: OFF	Not illuminated

OK or NG

OK: INSPECTION END
NG: GO TO 10.

CHECK DTC
Check that DTC U1000 or U1001 is not displayed.

OK or NG
1. OK: GO TO 4.
2. NG: Perform trouble diagnoses for DTC U1000, U1001. Refer to "DTC U1000, U1001 CAN COMMUNICATION LINE ".

CHECK SNOW MODE SWITCH CIRCUIT

Turn ignition switch OFF.
Disconnect combination meter harness connector.
Turn ignition switch ON.
Check voltage between combination meter terminal 16 and ground under the following conditions with CONSULT-II or tester.

VOLTAGE REFERENCE

CONDITION	VOLTAGE
Snow mode switch: ON	battery voltage (11 - 14V)
Snow mode switch: OFF	0V

Fig 2: Identifying Voltage Between Combination Meter Terminal 16 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 5.
NG: GO TO 6.

CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

OK or NG
1. OK: Replace combination meter.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
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 voltage between snow mode switch terminal 1 and ground with CONSULT-II or tester.
  Voltage: Battery voltage
  
  Fig 3: Identifying Voltage Between Snow Mode Switch Terminal 1 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 8.
2. NG: GO TO 7.
DETECT MALFUNCTIONING PART
Check the following.
- Harness connectors E105, M13
- IPDM E/R harness connector E8
- 10A 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
1. Turn ignition switch OFF.
2. Check harness continuity between snow mode switch terminal 4 and combination meter terminal 16.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
3. Also check harness for short to ground and short to power.
OK or NG
1. OK: GO TO 9.
2. NG: Repair open circuit or short to ground or short to power in harness or connectors.
CHECK SNOW MODE SWITCH
Refer to "COMPONENT INSPECTION ".

OK or NG
1. OK: GO TO 13.
2. NG: Replace snow mode switch.
CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten two ground screws on the body. Refer to "GROUND INSPECTION ".
  
  Fig 4: Locating Ground Connections
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: GO TO 12.
2. NG: Repair or replace ground connections.
CHECK SNOW INDICATOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Disconnect snow mode switch harness connector.
2. Check harness continuity between snow mode switch terminal 2 and ground.
  Refer to WIRING DIAGRAM .
  
  Continuity should exist.
3. Also check harness for short to power.
OK or NG
1. OK: GO TO 12.
2. NG: Repair open circuit or short to power in harness or connectors.

CHECK SNOW INDICATOR

Check continuity between snow mode switch terminals 2 and 4 under the following conditions.

CONTINUITY REFERENCE

CONDITION	Continuity
1	Should exist.
2	Should not exist.

Fig 5: Identifying Continuity Between Snow Mode Switch Terminals 2 And 4

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: GO TO 13.
NG: Replace snow mode switch.

CHECK INTERMITTENT INCIDENT
Refer to "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

INSPECTION END